Electricity Saving Tips For Homes And Offices

Choose right inverter for home and maintain it right to manage electricity bills

By on April 22, 2016
Hindi Translation: घर के बिजली के बिल का उचित प्रबंधन करने के लिए सही इन्वर्टर का चुनाव

Power supply situation continues to be bad in India with power failures ranging from 2 to 4 hours in cities and 8 hours or more in small towns and villages. This makes it difficult to manage daily life and thus installing power backups is inevitable.

Although there are many solutions to this problem but the most common solution that most people apply in India; is to go for an Inverter-Battery system. However when somebody plans to purchase an inverter, the first question that comes to his/her mind is “which inverter to purchase?” and how one knows what suits best for its requirements. When you think of buying a new inverter, it is important to escape from the marketing gimmicks, and understand some basic related facts, eventually of much help before purchasing an inverter. Selecting the right kind of an inverter/battery system is one such important factor. And not just selecting the right inverter-battery system, it is important to select the right solution that solves your need.

In this slightly longish post, we will discuss on various power backup solutions, their pros and cons in different situations and will also help you choose the right one suitable for your need.

What are the various alternate power supply solutions?

  • Inverter: It is a simple device that stores electricity from the grid in a battery and uses the DC (direct current) power from battery and converts it into AC (alternating current) that is used by appliances. Although interchangeably used, but Inverter and UPS are slightly different and we will explain that later in this post. Inverters are generally good if you want backup for small household appliances like lights, fans, TV, computers, etc. However these days’ bigger inverters can also support Refrigerators, Washing Machines and Mixer Grinders. But then adding these big appliances significantly increases the size of Inverter-Battery system and it is best if one can avoid using them on Inverter. Using inverters for ACs is strictly not suggested.
  • DG Sets: DG sets use the power of Diesel to generate electricity. They generate instantaneous electricity rather than storing it. They are good for larger loads. So if you want to run ACs, Refrigerators, Motors, etc on power backup, then using DG set can be a good solution.
  • Solar Power: Solar PV is slowly and steadily gaining popularity and is a great way to generate power backup. Energy from Sunlight is converted into electricity and stored in batteries. However the limitations of Solar Power are similar to that of regular inverters, so they are still not the best solution for bigger loads.

Now we will cover each of them in detail in different sections of this website, but in this article, we will mainly focus on Inverter-battery system.

First understand your Power Requirement

Before purchasing any of the solutions mentioned above, the most important thing is to understand your requirement. To evaluate the power requirement, it is very important for you to know two things upfront:

  • The total load that you want to run on backup: This is essential to get the right size of inverter of power backup solution. And from size we mean the VA value. To get to the VA value, it is very important for you know the wattage (or watts) of each appliance that you want to run on the backup. More details on this are explained in the section below.
  • Total number of hours for which backup is required: This is essential to size the batteries that you need (or in DG sets the litre capacity that you need).

To give you a analogy, imagine the car or vehicle that you have. It has a certain CC capacity (like 800 CC, 1200 CC, 1500 CC), which determines the power that the car has. More power can run faster or can take more load. This is similar to the VA value of inverter, which determines the load that it can take.

The amount of fuel (storage tank capacity) a car/vehicle can store (along with its efficiency) can determine how long (distance) it can go. Similarly battery bank size determines how many hours you can get as backup.

So what do you need to know?

Look at the list of appliances that you want to run on backup and their wattage. Check the list below to get some standard values used for calculations:

  • 1 Fan – Fans Consume 75-90 Watts. For calculation we take 90 watts.
  • 1 tube light – Assume 45-50 watts for standard tube lights. 28 watts for T5 tubelights.
  • 1 CFL – 25 watts (default) or take the actual number if known.
  • 1 Television – LED TVs take 30-100 watts depending on size. LCD TVs consume 50-150 watts. CRT takes about 120 watts.
  • Set top boxes consume anywhere between 8 watts and 25 watts. Standard Definition set top boxes consume 8 Watts. HD boxes consume about 18 watts and HD DVR boxes consumed 25 watts.
  • Desktops consume 120-250 watts depending on type. Those with LCD screens consume about 150 watts and those with CRT about 250.
  • Laptops consume about 50 watts.
  • Wi-Fi routers, modems, mobile phone chargers, etc consume 5 watts or less.
  • Gaming stations and home theatre systems consume 100 watts or more depending on type and size. It should be available on product manual or on manufacturers’ website.
  • A room air cooler would be about 250-300 watts.
  • Induction cooker would be 1000-1500 watts (or 1 – 1.5 kW)
  • Mixer Grinder would also be about 350 watts.

Suppose you want 1 Fans, 1 Tube lights, 1 CFL & 1 CRT television to operate at the time of power failure, i.e. running on inverter. Therefore the total power requirement (based on table above) comes out to be (1*90 + 1*50 + 1*25 + 1*120) = 285 watts. 285 watts here is the total load (as mentioned in point 1 above)

If you want a backup of 6 hours, then you need to store 285 x 6 = 1710 Watt-hour or 1.71 kilo watt hour (or units) of electricity. This is the storage that you need (as mentioned in point 2 above).

Now the calculation above assumes that every appliance will be “switched on” at any given point in time. Taking this exact value is safe. But if you still want to economize the size (to save costs) you can multiply the values by 0.8 if the appliances are for a 1 bed room home, 0.6 for a 2 bedroom home and 0.4 for a three bedroom home (assuming lesser number of appliances will be on at any given time).

Find the VA rating of the inverter you require

Now in an ideal situation the total Watt value (sum of wattage of all appliances as calculated above) should be the same as VA value. But due to a factor called “Power Factor” (explained in this article: link), it is not the same. For a residential house we assume power factor to be about 0.7 to 0.8 (to be super safe assume 0.7 and to be economical assume 0.8). So VA value is Total load in Watts divided by 0.8. So in the case above VA value would be:

285 / 0.8 = about 356 VA

Now you may not get an inverter of exact 356 VA but you will have to go with an inverter with VA value more than 356 (say 400 VA). As it is everything is an assumption, so we assume a value that is safe.

Find the battery size that you require

Now in the example above we needed a 356 VA inverter and we want a backup of 6 hours, then the total VAh that we need is:

356 x 6 = 2136 VAh

A regular inverter battery available in market is of 12 V, so the Ah value of battery required would be:

2136 / 12 = 178 Ah

If you go the market to purchase a battery then the first thing that you need to look at is the Ah value, which is representative of how much energy a battery can store. Typical Ah value of inverter batteries in market are: 100 Ah, 120 Ah, 150 Ah, 180 Ah, 200 Ah.

So in our example a 180 Ah battery would be ideal for the system.

What about bigger appliances?

Appliances like Refrigerator and Air Conditioners have motors in their compressors that need huge amount of current to start (unless you have inverter technology refrigerator or air conditioner). This significantly increases the VA and size requirement for an inverter.

A typical 250 lts refrigerator has a compressor which in steady state would consume about 300-350 watts, but just because it needs more current to start up, one would need about 2.5 kVA inverter to support such refrigerator. However because the compressor starts and stops as per the cooling needs, the total energy consumption per day for a refrigerator would only be about 1.5-2 units or kWh per day. So including a refrigerator in the appliance mix increases the size of the inverter significantly, but not of the battery.

Also the reason we do not recommend including Air Conditioners on inverters is because the demands of air conditioners is quite high. A 1 ton AC which typically consumes 1000 watts (or 1 kW) would need 3.5 kVA inverter just to manage its starting load. A 1.5 ton AC consumes 1500 watts and needs 5 kVA inverter to manage its load. The electricity consumption of ACs is also quite high, and a 1 ton AC would consume about 0.8-1 unit of electricity in an hour and a 1.5 ton would consume about 1.5 units in an hour. So number of batteries needed also significantly increase if you put AC on inverter.

Note: Inverter technology Refrigerators and ACs do not need high amount of current to start and thus if you have an appliance with inverter technology, then you can include AC or Refrigerator in the sample calculations (of other appliances) as above (and need not worry about high kVA value).

Issues with longer backup needs and Voltage of Inverter.

Many people have long power cuts (8-10 hours) and in such case, setting up inverters becomes difficult unless the load is less. As we have seen above, typical batteries available are of 12 V and of size 100 Ah, 120 Ah, 150 Ah, 180 Ah and 200 Ah. If for longer backup you need about 400 Ah battery storage, then you will have to go for two numbers of 200 Ah batteries. But this brings another challenge: that of Voltage of Inverter.

Typical small inverters (less than 1400 VA) are generally of 12 V. Which means you can either connect only 1 battery or if you want to add more batteries then you have to put them in parallel (as shown below).

Source: www.gizmology.net

Batteries in Parallel (Source: www.gizmology.net)

But typical charging current of an inverter is about 10-15 Amp. Which means if you have one number of 200 Ah battery then it will charge in:

200 Ah / 10 A = 20 hrs

If you put two such batteries in parallel then the current will divide into two parts and thus charging time will become:

200 Ah x 2 / 10 A = 40 hrs

In such case if you have power cuts every day, then the battery itself will not charge in a full day. In fact if you put a 200 Ah battery and you need 10 hrs backup, then that itself will not happen because charging time is 20 hrs.

Solution

A possible solution is to go for an inverter with higher Voltage (say 24 V or 48 V or more). In canse you go for a 24 V inverter system, then you can connect batteries in series (as shown below), which does not divide the current (same amount of current charges both the batteries).

Batteries in Series (Source: www.gizmology.net)

Batteries in Series (Source: www.gizmology.net)

So if you need 200 Ah backup, then you can go for two numbers of 100 Ah batteries and put them in series. And the charging time will be

100 Ah / 10 A = 10 hrs

But then inverter with higher voltage are of higher VA value. Like 24 V system starts with 1400 VA onwards.

So it is important to go for right Voltage inverter.

What is “C rating” of batteries?

Although it is irrelevant to think about this while buying batteries, but we have got questions on it in past. If you are not curious, you can choose to ignore this section.

But if you are curious then the C rating (or the coulomb rating) of the battery (or cell), is the measure of the quantity of charge in a fully charged cell. The Coulomb capacity is provided in AH or Amp Hour unit. In other words, we can say that the C rating of a battery indicates the continuous current drawn (in amps), the cell will support. By multiplying the C rating with the cell capacity in milli-ampere-hours (mAH), the continuous current in milli-amperes (mA) of a cell can be determined. For example, in a 1,000 mAH battery with a C20 rating, the continuous current that may be drawn out of the battery is 1,000 mAH x 20 = 20,000 mA, or 20 amps (A) (divide by 1000). Keep in mind that 1,000 milliamps equals one amp. So from the above calculation, we ascertain that the battery will produce 20 amps of continuous discharge.

However, a C20 rating battery is considered ideal for the inverters and that is the C rating with which most inverter batteries are available in market. So if you ask for inverter battery, you will mostly get one with C20 rating.

Types of Inverter and How to Choose One

There are two types of inverters available in Market: Pure Sine Wave Inverter and Modified Sine Wave Inverter (or Square Wave Inverter). The choice will depend on the kind of appliances that you have.

If you want to run electronic appliances (like TVs, Computers, etc) on inverter, then go for Pure Sine wave Inverter, else you can go for Modified Sine Wave Inverter.

Please not Modified Sine Wave Inverter can cause humming noise when used with induction motors like ceiling fans, etc.

Difference between UPS and Inverter:

Although used interchangeably, there is a difference between UPS and Inverter. The basic function and architecture remains the same, but the difference is minor.

The difference between a UPS and Inverter lies in the time in which it can switch to battery power when a power cut happens. A UPS can switch to battery power in 3-5 milli seconds, whereas an inverter does it in 100 milli seconds. The choice between the two will depend on how critical is the switching to backup for the appliances that you want to support. For e.g. a desktop computer would need faster switching as you can loose data if it switches off even for a few milli seconds.

Even in UPS there are Online and Offline UPS. Online UPS are those in which the power is drawn from the battery irrespective of the availability of power from main line. This makes sure that there is no loss of work even for a few milli seconds when there is a power cut. Offline UPS is one where the power is drawn from battery only when there is power cut. All other times it is drawn from mains.

Types of Batteries and how to choose one

There are 3 types of batteries available in market: Flat Plate, Tubular and Maintenance Free. Without getting too much into details, all we can say is that Tubular Batteries are the best choice for inverters. They may cost slightly more than Flat Plate, but they will last longer. Maintenance Free batteries may sound good, but they have lesser life (4-5 years as compared to 7-8 years of a tubular battery). But the most important thing to run batteries for a longer times is to make sure that it is topped (filled) with distilled or RO water frequently and the fluid levels are maintained.

What would be the cost of 500 VA inverter and 100 AH battery?

The cost of an inverter with 500 VA would be around Rs. 3,000 and for 100 AH battery would be approximately Rs. 10,000. Therefore, if you are looking for an inverter with 500 VA and 100 AH battery, it would cost you around Rs. 13,000. Why not go online to search and compare the best deals and save the money that you may have to pay to the middle man, the quality of products and warranty is same and since now some of the e-commerce sites are providing the options of cash on delivery, there is no need to worry more about the delivery.

Other things to consider

Warranties: While purchasing batteries, one must look for maximum warranty. An inverter battery combo of the same brand is useful at times as manufacturers send their engineers for maintenance on a regular basis, which increases the life of the inverter/battery system.

In past Inverters and batteries were manufactured by different manufacturers. Su-kam, Luminous, Microtek were known manufacturers of inverter, whereas Amaron, Exide, etc were known manufacturers of batteries. But now all of them have inveter-battery combos where batteries and inverters are designed to work well with each other. So a combo system works well.

Inverter is a maintenance free product and shall not require any schedule maintenance except failure attention. Maintenance is only needed for batteries.

Efficiency of Inverter/battery system

Inverters are not 100% efficient and thus running the same appliances on inverter would cost you about 25% more. But DG sets will be slightly more expensive (which is about 33% more).

Inverters use some energy to drive its electronics and cooling fan. Battery uses additional energy during the process of charging and discharging. All this energy is wasted as heat energy. It is in the order of 8% during no load and goes up to 20% during full load. This inefficiency is generally taken care by the manufacturer and the rating mentioned is what is at the output terminal. Therefore, energy efficiency is generally not taken into account.

Conclusion

We hope that this information helps you choose the right inverter for your house. We have tried to include answer to every question that we get on this website, but if you still have some doubt, you can leave a note in the comments section below.

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  • He Man

    Based on my research in the market. ,

    1 Pure Sine ware inverter/ups Only,

    2 Purchase only branded UPS/Inverter. like Sukam, Luminous or Amron only. ( Amron claims that they have copper transformer inside but can not verify it second Its only Amron which has mentioned actual Watt or volts other two have mentioned 1100 as their Model numbers so if you purchase 1100 Lim inverter its actually 900v w less than what the model number says.

    If you need an inverter for home purchase maxim number of Volt/watt that can be operated with 12 V, Exide does provide 1400v Inverter that can be operated with 12 V/ single battery but its modified wave inverter meaning its not pure sine wave, , more than 1400V you need two batteries that will cost more money.

    If you are ready to spend more on Batteries Purchase only Tabular Battery, Like Exide it 500, 150 Amp. 36 plus 12 = 48 months warranty. With in 36 month you would get a battery free of cost, 12 months is pro data basis on MRP ( 10-20% discount) Exide IT 500 cost 14000 plus in open market and Amron cost 11000 for 150 AMP Tabular. Tabular battery last longer that allows more of battery water with thick metal plates.

    To conclude, only pure sine wave, close to 1400 V ups with 12 V it could be from 900/V w to 1100 V
    Only Tabular battery exide or Amron with 36 months replacement warranty.

    Microteck provide battery Trolleys as compared to local ones.

  • Rajesh Marar

    can any one please explain, if i use c10, and c20 battery simltnsly for particular equipments (2fans,1tv,1laptop,4cfl), which would discharge fastly
    and what mean by 7.5 ams discharge(like wheather we can use above mentioned equipements with 7.5 ams discharge capacity battery(c20) or should is go for c10(which discharge at rate of 15 ams)).

    2)Is there any stiuplation that , high watts equipments can be run through some specified ‘ams” discharge capacity battery only(especialy c10 batteries compared with c20)

    • He Man

      Go for C 20 batteries only, dont get confused.

  • rj bhai

    Hello Bro need Some Help
    I Looking For Inverver And Battery Online But I am Confused in Battery And Inverter WHich Combo Will Be Great For mY home
    I NEED TO RUN 4 FANS+4 LED+1 LEPTOP
    THEN FROM WHICH INVERTER I NEED TO GO
    i am thinking about this amraron battery
    http://www.amazon.in/Amaron-Inverter-150AH-Tubular-Battery/dp/B010X9B4I4/ref=sr_1_5?ie=UTF8&qid=1489984910&sr=8-5&keywords=inverter+battery
    and microtek inverter
    https://www.flipkart.com/microtek-ups-sebz-1100-va-1-1-kva-pure-sine-wave-inverter/p/itmebmdcfsrbfy48?pid=INVEBMDCKFHMZZYS&srno=s_1_1&otracker=search&lid=LSTINVEBMDCKFHMZZYST3XAG0&qH=1c8026f03de5dbf4

    Can You please tell me is that both are right choice or i need to change it and if need to change then which is better

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would be about 500 watts. So VA required would be about 700. But if you go for a 150 Ah battery then total backup hours you would get would be about 3-4 (depending on how many things you run at any time). You can go for this combo, or if you want to save some costs, you can also look at these models of inverters:

      Microtek UPS SEBz 900 VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/zka5pTuuuN )
      Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/7cukn!NNNN )

    • rj bhai

      ya 3-4 hours back up is enough for me you helped me to choose right inverter but what about battery .can you tell me is that battery is fine that i have choosen that is amaron in above link

    • He Man

      Exide IT 500 150 AMP is most popular and best in the market cost more than 1400 rs in open market. I am also planing to purchase Amron 150 TAB battery for 1100 rs.

    • https://www.bijlibachao.com Abhishek Jain

      We do not have much research on batteries to suggest you a good one. But all I can say is that Amaron is a good battery brand and you can certainly go for it.

  • amarnath

    hello abhi!
    please suggest
    1. best inverter of 900va pure sine wave with model info in moderate cost
    2. a 100AH tall tubular battery with model information which suit for it (in low price & and moderate price)
    my budjet is 13000-14700
    i am living in vizag, please also suggest the dealer who will offer this deal.
    please help me!
    please also suggest best possible combination to shop the above 2 items
    thank you

    • He Man

      Sukam Falcon plus 1050/1100 V cost less than 5300 rs Zalio 1100 4300Rs Amron 850 V 3600/-
      Amron Tabular 150 Am cost 1100 Rs in open market. You may choose any one of them.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Amarnath,

      We only have data from online sources. So I cannot suggest you any offline dealer. Here are some good inverters of 900VA:

      Microtek UPS SEBz 900 VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/zka5pTuuuN )
      Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/7cukn!NNNN )

      Inverters typically are not expensive and you may get them in 4-4.5K. The biggest costs is for batteries. Currently we do not have data/research for batteries to make a suggestion. However, in general Amaron and Exide are good in batteries.

  • Dharmendar Singh

    Abhishek, Can you help me to buy an inverter with battery for
    consumption of 600 watts, 3 & 4 hrs backup.

    • He Man

      Sukam sihiny is not pure sine wave inverter, Luminous eco is also squre Wave inverter.

    • https://www.bijlibachao.com Abhishek Jain

      600 W in 4 hours would be 2400 Wh or 2.4 units of electricity. If you go for a 220 Ah battery then it would go for about 3 hrs may be a bit more.

      But to charge 220 Ah battery, it would be better you go for a 900-1000 VA inverter. So some of these inverters would be good:

      Luminous Zelio 1100 VA (Flipkart Link: http://fkrt.it/XDaL~!NNNN )
      Microtek UPS SEBz 1100 VA (Flipkart Link: http://fkrt.it/FqB0ZTuuuN )

      Go with these with 220 Ah battery.

    • Dharmendar Singh

      I won’t use full load on this max to max I use 50-60% with atleast 2hrs backup which one you would suggest

    • https://www.bijlibachao.com Abhishek Jain

      With 60% load it would be 360 Watts and for 2 hrs it would be 360×2 = 720 Wh

      Also 360 Watts would be 360/0.7 = 514 VA … so about 550 VA inverter would be good enough.

      To be safe you can go for 650-700 VA inverter with a 150 Ah battery. In fact a 150 Ah battery can give you about 4 hours backup if the usage is just 50-60%.

      You can look at these models:
      Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/9USkRTuuuN )
      Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/EIG2X!NNNN )

  • Vrajesh Khamitkar

    Great Info…Abhishek, Can you help me to buy an inverter with battery for consumption of 3 Fan, 3 CFL, 1 Setup Box, 1 Laptop, 1 Wi-Fi, 1 LED 49 Inch TV. for 6 hrs backup.

    • https://www.bijlibachao.com Abhishek Jain

      Here is your consumption

      3 Fans: 3 x 90 = 270 watts
      3 CFLs: 3 x 23 = 69 watts
      1 STB: 25 watts
      1 laptop: 60 watts
      1 wi-fi: 5 watts
      1 LED TV: 60 watts.

      Total = 489 watts or about 700 VA

      In 6 hours it would consume 489 x 6 = 2934 Wh or about 3 units of electricity.

      For 3 units, you would need about two 150 or 180 Ah batteries (180 to be safer).

      For two batteries you need 12V + 12V = 24V inverter (12V for each battery).

      The smallest 24 V inverter would be about 1400 VA. You can look at these:

      Sukam Falcon (+ or ++ series)
      Luminous Zelio 1700 (Zelio is one of their most popular range)
      Microtek UPS SEBZ 1500 VA

  • saravana kumar

    Good Information Abhishek, Can you help me to buy an inverter with battery for consumption of 2 LED bulbs, 2 CRT, 1 Fan, 1 LED TV (40 inch), 1 setupbox, 1 laptop and 1 modem with wifi router for 6 hrs backup.

    • https://www.bijlibachao.com Abhishek Jain

      Do you mean CFL or CRT?

    • saravana kumar

      Please read them as CFL bulbs and one stabilizer also.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage is

      2 LED Bulbs – 2 x 15 = 30 Watts
      2 CFLs – 2 x 23 = 46 Watts
      1 Fan – 90 Watts
      1 LED TV – 60 Watts
      1 Set Top Box – 25 Watts
      1 Laptop – 60 Watts
      1 Modem – 5 Watts
      1 Stabilizer – 10 Watts.

      Total about 326 Watts. For 6 hours you need about 1925 Wh or 1.925 units of electricity. So you need a 200 Ah battery. For 326 Watts ideally you need about 450 VA inverter. But then 450 VA inverter would be too small to charge 200 Ah battery. So you should go for 850-900 VA inverter.

      You can look at these inverters:

      Microtek UPS SEBz 900 VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Csprg!NNNN )
      Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/dbR6TTuuuN )

      This along with a 200 Ah battery.

  • Muzamil Mohammed

    hi i am looking to buy an inverter including battery for consumption of 5 fans & 5 tube lights, this should run at least for 8-10 hours.

    so please guide me to choose the right one

    • https://www.bijlibachao.com Abhishek Jain

      5 fans = 5 x 90 = 450 watts
      5 tubelights = 5 x 55 = 275 watts

      Total = 725 watts. So you need at least 1000 VA or 1 kVA inverter.

      For 10 hours you need 725 x 10 = 7250 Wh backup. Of 7.25 units.

      A 200 Ah battery can store 2 units of electricity. So you need at least 4 such batteries. To charge so many big batteries, it would be better if you go for a 2.5-3.5 kVA/48V inverter (that can handle 4 x 12V batteries).

      You can check Luminous Cruize ( https://www.luminousindia.com/assets/downloads/cruze-product-page.pdf ) or Su-kam Fusion Series ( http://www.su-kam.com/power-solution/inverter-ups/fusion-series-pure-sine-wave-commercial-ups )

    • Amit Malik

      abhishek ji mereko samsung ka printer chalana h and also 2led of 9w and that printer consumed 3.2amps or 220-240volt
      and i hv invertor of luminus 875va but its not working on printer????????

    • https://www.bijlibachao.com Abhishek Jain

      3.2 Amp on 240 V ka matlab 240×3.2 = 768 VA. Kahin to aapka load zyada ho raha hai jiske karan printer nahin chal raha hai.

  • amarnath

    hi,
    please suggest an inverter with brand name to support
    1fan+1tube+1crt tv+2cfl
    also suggest battery of 150Ah with model name which suit best for it

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would be

      90 (Fan) + 55 (Tubelight) + 150 (CRT TV) + 50 (CFL) = 345 Watts.

      VA value needed = 500 VA

      You can look at these models:
      Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/9USkRTuuuN )
      Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/EIG2X!NNNN )

      You can go for the same brand battery and inverter or you may consider Amaron/Exide battery.

  • Clinton

    I have a accumulated loads of 1000w.. I have a luminous zelio inverter of 1.5kva….pls i need backup of 12hours or more….what battery rating will be idle for this to happen

    • https://www.bijlibachao.com Abhishek Jain

      1000 W for 12 hrs = 1000×12 = 12000 Wh or 12 kWh or 12 units.

      A battery of 200 Ah capacity can store max 2 units of electricity. So you need 6 such batteries.

      Your inverter would be 24V …. so you will have to put 3 parallel circuits with 2 batteries (of 12V each) per circuit. But please note that with 3 parallel circuits, the charging current will be equally divided into 3 … so your charging time will increase 3 times. So if your current system charges fully in 6 hrs, then it will take 18 hrs to charge.

      Ideally if you need backup of 12+ hrs, you should go for a DG set. Inverters for home are not suitable for it.

  • Raj

    Looking to buy inverter to support 5 Fans + 15 LED lights + 1 Laptop + 1 LED TV(55 inch) – Optional (600 Lts Refrigerator).

    • https://www.bijlibachao.com Abhishek Jain

      What kind of refrigerator do you have? Is it one with Inverter Technology Compressor or a regular refrigerator?

    • Raj

      with 3 Hour backup.

  • Chandan

    Hello sir, thank you and really appreciate your post. got a bunch of questions to clear my confusion. :p
    I will run 2-3 ceiling fans (one of them consumes 55w only), 3 nos 7w LED bulbs and 1nos 28w T5 tube. my backup time is more important than VA. if 6 hours that would be great. What should be my choice?
    secondly, the warranty factors of the batteries. Amaron tubular gives 36 months whereas luminous gives 18 – 24. and rest pro-rata. what is this?
    thirdly, take for example, luminous zelio or ecovault. Ecovault is older-looking whereas zelio is modern. which is better? i saw you mentioning ecovault. thats it.

    • https://www.bijlibachao.com Abhishek Jain

      Your total load is:

      For Fans: 2*90 + 1*55 = 235 Watts
      For LED Bulbs 3*7 = 21 Watts
      For Tubelight 1 * 28 = 28 Watts

      Total would be 284 watts which is roughly about 400 VA.

      In 6 hours it would consume 284 x 6 = 1704 Wh or 1.7 units. So you need a 180 Ah battery.

      So you should go for a 700 VA inverter with 180 Ah battery. As for the two luminous models, Zelio is better and more popular one. I would suggest you to go for that.

      Usually you get better warranty and AMC if you buy a single brand inverter + battery combo. They do regular visits and make sure that your inverter battery combo is running properly.

      Usually a free warranty is one where in case anything fails, the part is replaced free of cost. Whereas in pro-rata there is a charge on the part replaced, but the cost will depend on how old the part is. The older the part, more is the cost. Amaron does give better warranties on its batteries. In general their batteries are also better.

    • Chandan

      Thank you so much Sir. It is a great help.
      And if I go for Luminous Zelio and other brand battery like Amaron/Okaya/Exide, will there be any problem? Will the service team not visit? Or will I go for Combo of Luminous?

    • https://www.bijlibachao.com Abhishek Jain

      You can certainly go for Zelio with Amaron battery. It is just that when you go for a single brand, the person coming for AMC makes sure that the fluid levels in the battery are right or not. Battery life depends a lot on how well you maintain the battery. If you can do it yourself, then you can go for any combo.

  • Mac Hall

    Hello Abhishek,

    I admire the way you reply to every query that is directed your way. Thank you very much for that. I’ll be grateful if you can help me with queries regarding my own setup:

    I have a 3000W inverter connected to 4 x 150AH batteries.

    My appliances are about 10 light bulbs, a medium refrigerator, two ceiling fans, two LED 32 inch TVs, a microwave oven, a router modem, and two computers.

    Not all appliances run at the same time, and I live in a place where power cuts can last for up to 24 hours (or more!). The system can sustain during power cuts for over 24 hours and more sometimes, before the inverter starts to scream low battery:) The inverter charge current is 45A.

    I would like to buy a bigger refrigerator to replace the current one. My question is, can I add 2 more 150AH batteries, and will it work?

    Thank you very much for looking at this for me.

    • https://www.bijlibachao.com Abhishek Jain

      Most likely your inverter would be a 24V inverter with 4 batteries connected in such a ways that you have two sets of two connected in parallel. The charging current for each set is 45/2=22.5 Amp (as there are two sets in parallel). You can add one more set of two in parallel, but then the current will get divided by 3. So your charging time will increase by 30-40% if you add two more batteries. If that is fine then you can add two more batteries in parallel.

    • Mac Hall

      Many thanks for the response sir. God bless you.

  • Satish K S

    Hi Abhishek

    We would like to go in for new Ups for home with 2 fans, 5 tube light, 1 CRT tv, 2 CFL tubes, 1 setup box, 1 laptop and 1 music system. could you kindly suggest me a suitable UPS with battery…

    • https://www.bijlibachao.com Abhishek Jain

      How many hours of backup do you need?

    • kelsang

      I am looking forward to buy a UPS too.. to use a 1laptop 1 fan and router and charge my phone and CFL bulb of 30 watt.

    • https://www.bijlibachao.com Abhishek Jain

      1 laptop would be 60 watts
      1 fan would be 90 watts
      1 router would be 5 watts
      1 phone charger would be 5 watts
      CFL 30 watts

      total = 190 watts … so VA value needed = 270 VA …. and for 8 hrs backup needed = 190 x 8 = 1520 Wh or 1.52 kWh or units.

      A 180 Ah battery would be needed and to charge such a big battery you would need a big inverter (and not small one with 270 VA) …. so it would be better if you go for a 700-800 VA inverter. You can look at these:

      Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/wGaoc!NNNN )
      Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/B1DBFTuuuN )
      Or Su-kam Falcon+ model.

    • kelsang

      and i need a back up for about 7-8 hours.

  • Senthil

    Thank you for this awesome Informative post Abhishek!!
    I am looking for a inverter + battery for 3 fans (Alteast 2 at the same time) + 3 tube lights (Atleast 2 at the same time) + 1 LED TV + Router + Laptop with a power backup of 6-7 hours ideal for a 3bhk house.
    Kindly suggest me the best options to go for.

    • https://www.bijlibachao.com Abhishek Jain

      3 fans would be 270 watts
      3 tubelights would be 100 watts
      LED TV would be 50-60 watts
      Router 5 watts
      Laptop would be 60 watts.

      Total would be about 500 watts. Which means for 7 hours you would need (500 x 7)/1000 = 3.5 units of electricity. Reducing some impact of 1 fan and 1 tubelight, you would still need 3 units of electricity. I think two numbers of 180 Ah batteries would be better for you. And you will have to go for a 24V inverter.

      You can look at these:

      Sukam Falcon (+ or ++ series)
      Luminous Zelio 1700 (Zelio is one of their most popular range)
      Microtek UPS SEBZ 1500 VA

  • Pankaj Agarwal

    Hi,
    I am having a 1.5KVA inverter with a Amaron tall tubular 150MH battery… which is not sufficient and i would like to increase the backup. What do u suggest i should do?

    • https://www.bijlibachao.com Abhishek Jain

      I guess your inverter is a 12V inverter as you have put only 1 battery in it. You can add another battery in series to it, but please note, that the time to charge would double up. You can only add a 150 Ah battery as your old battery is 150 Ah.

      By the way it is a bad to mix an old and new battery. What you can do is, put two new 100 Ah batteries in series. With total of 200 Ah, your back will increase by 50% and charging time will also increase by 50% (because the batteries will be in series). From series I mean one after another in line.

  • Arvind

    Hello Sir,
    I am living in a rural area where we have power cut around 15 – 20 hours. So i was looking for some alternative solutions. I have below requirements
    a. 3 CFL for 12 hours.
    b. 3 fans for at least 10-12 hours.
    c. 1 LED 23 inch TV for 4- 5 hours max.

    Question 1:- assume there is no grid power in night so what capacity of batteries will suffice to run above mention appliances?

    Now come to the charging point i want to install solar system which will charge batteries in day light.

    For example suppose grid power is available only for 4 hours. 2 hours in day and 2 hours in night.So i am looking for a solar solution which can run fans and TV in day light and can charge battery simultaneously.

    Sir please suggest me some best possible solution.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Arvind,

      15-20 hrs is really long and I doubt any inverter will be able to support backup for that long. I would strongly suggest you to look at Solar PV off grid solutions.

      For that the best thing would be:

      1) Replace your fans with BLDC fans (like Atomberg or Superfan). This will significantly reduce your daily power requirement and also reduce the size of solar PV that you need.

      2) Look for Solar PV off gid system. With BLDC fans your daily requirement would be down to 2 units per day from 4.4 units. For 4.4 units you will have to go for 1 kW system which would cost about 1 lakh, but for two units the cost will come down to half. Even the inverter size required would be less with BLDC fans.

      And the best part would be that you can be completely off grid for the whole day for these appliances.

    • Arvind

      Thanks Sir for your valuable comments,

      I would definitely go for off grid solar system.That is my priority too but can’t we have a hybrid system so that when main power is available appliances run on that when not then we have solar power/backups.

      So my idea for going hybrid is suppose we have main power for total 4 hours. 2 hours in day and 2 in night. in day time appliances will run on solar or main power directly without using backups. i am assuming we have 8 hours proper sunlight so in day time (8 solar + 2 main power) + 2 hours in night main power so total we are getting 12 hours power without spending backup power now we require only 12 hours backups from batteries. in which some percent of charging will be done by main power and remaining by solar power. By this way i have to purchase less watts of solar panel. Here i am assuming main power is available when sunlight is not very strong. please correct me if i am wrong.

      Kindly let me know what are the implication to have a hybrid system over completely off grid solar system.
      1. Is there any significant price difference ? which one will be cheaper?

      my understanding is we have to purchase inverter and batteries for both(hybrid or complete solar) anyway so can’t we use same inverter and battery for both or inverters and batteries are different for hybrid and complete off grid.
      Sir please let me know the component required for both model with suitable type.

      2. Secondly if i replace fans with BLDC fans then other appliances(LED TV and CFLs) are running on AC so do i have to buy separate inverter one for DC and oher for AC or same inverter can have both types of output. if no please suggest best inverters which has both(AC & DC) output.

      3. Sir you have mentioned that by connecting battery in series we can reduce charging time but capacity will also increase or we have to put batteries in parallel to increase backups because i have read somewhere that batteries are in series will charge up fast but capacity will remain as individual battery. while in parallel capacity will be summed up and charging time will increase.

      So my understanding is while charging(specially in daylight) put batteries in series and when in usage mode(in nights) put in parallel. We have to do this everyday. Please correct me if I am wrong.

      My apologies for having so many queries sir but i want to touch each and every options before making any investment.

      Thank you again for your kind help.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Arvind,

      There are solar hybrid inverters available in market that can charge batteries when solar is available and if solar is not available and grid is available, then it can charge batteries using the grid. They are optimized to use maximum solar and minimum grid power. Su-kam, Microtek and Luminous all 3 have hybrid inverters that can help you achieve this.

      Now to answer your questions:

      1) You may go completely off grid or you may go hybrid. Both are good. With complete off grid, you will not have to pay to electricity distribution company ever and you will not be dependent on them. However, even hybrid is good as you can reduce your solar panel costs with it. Typical payback (cost recovery) for solar investment would be about 7-8 years depending on your tariff (this is average). And if maintained well, life can be about 25 years.

      By the way inverters for solar can be hybrid or complete off grid. You can choose whatever you want. And if you go for a hybrid inverter, you need not buy any other solar inverter. So you just buy 1 inverter (hybrid) and few batteries.

      2) BLDC fans actually run on AC. They are not much different from your regular fans. You can run them on grid connection or on batteries. It does not matter. They just consume 50-60% less power. And as compared to solar investment, they turn out much cheaper.

      3) Connecting the batteries in parallel will divide the current into half and thus charging time will increase. Batteries in series will get same amount of current and thus will charge fast. In series the capacity will add up and will not remain as single battery. Be it parallel or series, the capacity increases by adding batteries, you can have a look at small toys available in market. In some cases the batteries are placed one after another while in some they are placed in parallel. So if you increase batteries the capacity increases (be it parallel or series).

      I do not think you need to shuffle the battery setup everyday. It will not make sense.

    • Arvind

      Thanks you very much Sir for your inputs so it is decided that i would like to go with hybrid model. Can you please suggest me some inverters and battery options which can fulfill my requirements.

    • https://www.bijlibachao.com Abhishek Jain

      We have not done complete market analysis of hybrid inverters yet so I cannot give you a lot of details. But I have seen some hybrid models like Su-kam Brainy, Microtek UPS hybrid HB, etc …. battery size will depend on number of units of electricity you would want to store. If it is just 2 units, then you can do with just one 220 Ah battery or two 100 Ah batteries. Check with your solar installer, s/he should be able to help you.

    • Arvind

      Hello sir, I have tried to search online and i got following options
      For inverter: luminous 1500VA/24V hybrid
      for batteries:. Exide 3Lms 300 300AH/6V

      So i am planning to buy 1 battery of(300ah & 6V) and see the backup for few days if it is not sufficient i will purchase one more battery with same capacity but I have not found too many options in 6V so i just wanted to know having 6V battery is good or should i go with 12V battery. Both are tall tabular deep cycling battery.

      What is the difference in 6V and 12V battery? Can 6V battery run TVs and Fans with same backup?

      Attaching links for your reference:

      For inverter:
      http://www.powerwale.com/store/luminous-solar-home-ups-inverter-24v-1500va/77325

      For batteries:
      1. 6V and 300ah

      http://www.powerwale.com/store/exide-3lms-300-solar-batteries/76303

      2. For 12 v 200ah

      http://www.powerwale.com/store/luminous-12v-200ah-redcharge-tall-tubular-battery/77211

      http://www.powerwale.com/store/exide-invatall-2000-tall-tubular-200ah-battery/77238

      Sir please suggest me which combination should i go with keeping in mind that i will go for solar off grid panel later on.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Arvind,

      Your voltage of the inverter and the voltage of the battery has to match. If you go for a 24 V inverter, then you will have to connect 4 numbers of 6V batteries in series to make it 24V. Or you will have to put 2 numbers of 12 V batteries in series to make it 24V. You cannot connect one 6V battery to a 24V inverter.

      Batteries wise Exide is a better brand than Luminous. Luminous is a good brand for inverters.

    • Arvind

      Thank you very much sir for your continuous co operation. Below is the list of requirements and purchase options i just wanted it to confirm once before making any purchase.

      Requirement:
      1. Usage: 700 watts
      2. Backups Required: 8 hours

      Total 700×8 = 5600 WH

      For inverter 700/.7 = 1000 VA So i have decided to take 1500VA, 24V luminous nxg solar hybrid inverter.

      For solar Panel :- 4 panel with 250watts, 24V and 8.14 Amp current
      4x250W = 1000W getting proper sun light for 6 hours

      Power will generate = 1000×6 = 6000wh I think this power is sufficient for my requirement.

      Now i am little bit confuse to select correct battery size to store all energy.
      If i go with less capacity(i think 100ah) i will not get the backup for 8 hours. If i go with high capacity battery will not get charge 100% still i will not get backup as required.
      I think it is must to charge battery 100% if I want maximum output.

      I have done below calculation. Please correct me if i am wrong
      total load = 1000VA at any time.
      backup = 8 hours

      Total 1000×8 = 8000VAH required

      Now we have inverter with 24V so 8000/24 = 333.33 ah

      so I think i should choose 2 batteries of 180ah.

      I am very confuse if i go with 180ah and not consider battery efficiency like inverter will not allow full discharging i will not get desired backup.
      if i go with 200ah and if batteries are not getting full charge how much backup i will get.

      Sir please suggest me which is the best suitable option for me.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Arvind,

      Here are some of the mistakes in the calculation:

      1) Even for 6 hours sunlight your panel will not generate 6 units (or 6000 Wh) of electricity. That is not possible, because the amount of sunlight varies throughout the day and even a slight amount of shadow can bring down the production. 4 units per day (or 4000 Wh) would be possible but not 6 units or 6000 Wh.

      2) To calculate the battery size required you should consider the amount of electricity generated and not the amount of energy that you will be using (this is especially important for solar). To store 4 units of electricity, you will need two 200 Ah batteries at least. Each battery can store about 2 units of electricity. Each battery will be 12 V and would be connected in series to make 24V for the inverter.

      Also if your load is 700 Watts, then in 8 hours it would need 700×8 = 5600 Wh or 5.6 kWh or 5.6 units. So a 1 kW system will not be able to generate 5.6 units in a day. So you will have to depend on grid power.

      As I had mentioned earlier, the cheaper option would be to reduce your load by switching to energy efficient appliances. Going for efficient appliances would be cheaper than going for bigger sized solar PV system.

  • Balram

    Hi Abhishek
    Thanks for such informative post. It is really helpful in understanding. I have computed power consumption at 700 watts. I am looking for backup of around 4 hours. Please suggest some options.

    Thanks in advance for your reply.

    • https://www.bijlibachao.com Abhishek Jain

      1 kVA inverter should be good for you. But 4 hours backup means 2.8 units power consumption (=(700*4)/1000) …. so you would need 300 Ah in batteries (or two 150 Ah batteries). And for that you need 24V inverter. The smallest 24V inverter would be 1400 VA inverter.

      You can look at:

      Sukam Falcon (+ or ++ series)
      Luminous Zelio 1700 (Zelio is one of their most popular range)
      Microtek UPS SEBZ 1500 VA

      These are popular series from these brands.

  • Arvind Deokar

    Hi,
    I want to install off grid system for petrol pump.
    I want backup of 10-12 hrs. How much capacity battery required for that.

  • Badari

    If the Inverter is more VA then power bill will also increase can you give some idea on this as well please

  • Badari

    It was very good explanation on Inverters i really appreciate it,and i want to use 1 Tube light,1 Fan,1 TV, 1 Router can you please suggest the best model for 6 hours backup.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would be 50 + 90 + 80 + 5 = 225 watts. So VA value needed would be about 225/0.7 = 320 VA. For 6 hours units needed would be (225 * 6)/1000 = 1.35 … so a 150 Ah battery should be good enough.

      Inverters with very small VA values will also have slow charging. And if your backup requirement is more, it is better to go for a slightly bigger VA value to get the battery charged. A 450 VA inverter is good enough for about 135 Ah (not that it cannot charge 150 Ah, but it will take time). A 600-650 VA would be good for 150 Ah battery. And you can get very good choices in 700 VA. Also please go for pure sine wave inverter as you have electronics to run. You can look at these:

      Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/wGaoc!NNNN )
      Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/B1DBFTuuuN )

      If you want to go for smaller inverter then you may look at:

      Su-Kam SHINY Pure Sine Wave Inverter 450 VA (Flipkart Link: http://fkrt.it/B6PfFTuuuN ) …. this will be good with 135 Ah battery which may give you about 5 hours backup.

    • Badari

      Thank you very much Jain, based on your suggestions i will go for best inverter.

  • Shekar Nair

    Hello Abhishek,

    I have a very old Mini-Home Inverter (250 VA Square Wave).
    I just need to power 3 Fans and 3 CFL Bulbs. (I will not be using all the 3 fans and 3 CFL at same time).
    I am expecting electricity cuts to last for 3 hours every day.
    My question: Is a 100 AH battery suitable ? Or should I go for a more powerful battery.

    Thanks in advance.

    • https://www.bijlibachao.com Abhishek Jain

      100 Ah should be good, may be just to be safe you can go for 120 Ah.

    • Shekar Nair

      Thanks Abhishek

  • Rupal Jain

    Hi,

    My need is to run 3 CFL (40 watt each), 5 zero bulb (8 watt each), 1 TV lcd 40 inch, 1 set top box, 1 dlink router, 1 laptop and 3 fans. Which inverter and which battery combination will be best for me ? can you suggest any ?

    • https://www.bijlibachao.com Abhishek Jain

      A 900-1000 VA inverter should be good for you. You can look at these:

      Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/J!AxMTuuuN )
      Microtek UPS SEBz 1100 VA (1.1 KVA) Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/JayrVTuuuN )
      Su-Kam Falcon + 1100 Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/YTnpQ!NNNN )

      A 150 Ah battery can give you 2+ hrs backup, a 180 Ah would give you about 3 hrs backup and a 200 Ah would give you 3+ hrs backup.

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  • Krishanth

    Hi Abhishek,
    Nice share of thoughts. But I keep getting doubts with matching the inverter with the right the battery. I was told by few mechanic friends that Luminous value for money than exide and Amaron, lets see. So here are the requirements to get an advice from you. I need power for 2 tubelights, 2 fans(atleast 1 tube and 1 fan run continuously the others dont run always), one power outlet for mobile or laptop or wifi router or I could even use an extension to use all 3 together. So, the back up duration is max 5 hours. The catch her is the usage of fan is more and very less on lights as they are used only during nights and also for a lesser duration. So, how do you go about making out the right combination of power back up. Hope I have not confused you.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Krishanth,

      2 tubelights would be 100 watts and 2 fans would be 180 watts. Additionally a laptop would be 60 watts. Total would be 350-400 watts max. So a 650 VA inverter would be good enough. 5 hours at night would mean about 1.5-1.8 units electricity max. So a 150 Ah or 180 Ah battery should be good. And yes Luminous would be better brand for iverter than Exide and Amaron. Also a bigger inverter would charge battery faster, so I would say go for a 800 VA inverter with 150 or 180 Ah battery.

    • Krishanth

      Thanks. Any specific model you would like to suggest? Whats the deal about pure sine wave and square wave as we have both in the market?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Krishanth,

      Pure Sine wave inverter have better harmonics and in general they are better for appliances (especially electronics). Also you will hear a humming sound while using fans/motors with square wave inverters due to bad harmonics. In general Pure Sine Wave inverters are better. Till some time back they were quite expensive. But now the price difference is not much.

      As you have laptop to run, I would suggest going for Pure Sine Wave inverter only. You can look at these:

      Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/6Hd6h!NNNN )
      Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/o7CUATuuuN )
      Su-Kam Falcon+ 750 Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/6HlZQ!NNNN )

  • Aravind

    Hi. I want invertor for using 10 led bulbs 9 watts. Which one is the best and what is the cost.

    • https://www.bijlibachao.com Abhishek Jain

      The Smallest possible inverter would be good enough for 90 watts bulbs. If you can get a 150-200 VA inverter/UPS, even that would work. The smallest from the brands that I know of is Sukam Micron Digital 150 VA (Amazon Link: http://amzn.to/2kVmjIT ). Should cost you about Rs 2500 (or less).

  • KK

    Great Article! Very Useful.

    I need the usual 4 fans, LED TV, Set up Box and 4 lights setup but I have a slightly different requirement as well. I am an avid home baker so in addition to the things mentioned above, I need to run a 2000 watt convection oven for a period of 15 to 30 min Max (The time it takes for my cake to bake if the power fails after I have started baking? Is this something that can be supported? If yes, what inverter and battery capacity should I opt for?

    • https://www.bijlibachao.com Abhishek Jain

      Hi KK,

      Ideally without the oven an 800-900 VA inverter with 150 Ah battery can give you upto 3 hrs backup. But if you add the convection oven then the size increases significantly. You will have to go for a 3-3.5 kVA (3000-3500 VA) inverter for it. Which will most likely be a 36 V inverter needing 3 batteries. If you put 3 numbers of 100 Ah batteries then you can get up to 5 hrs backup.

      So it can be supported but then it significantly increases the size (and yes the electricity consumption) of your inverter.

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  • Harry

    i just bought 5 pieces of 100ah/12v inverter battries and a 7kva inverter. i need to know the number of mono solar panel of 12v/200w i can buy

    • https://www.bijlibachao.com Abhishek Jain

      6-7 panels of 200 W each should be good enough to charge the batteries.

  • gaurav

    Hi Abhishek,

    can you suggest batteries, inverter for solar system which runs 2 fans, 2 tube lights and crt tv.

    Thanks.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Gaurav,

      If you plan to put a solar PV system then the inverters are very different than regular inverters. You can use Solar only inverters or a hybrid inverter that can work on solar as well as grid (when solar is not sufficient). Sukam has Brainy Eco which is a hybrid inverter and a good one. Luminous also has hybrid inverters.

      Total wattage would be about 400-450 watts. So the inverter size needed would be about 650 watts. Battery size will depend on the hours of backup you need.

    • gaurav

      thanks for valuable info.

  • monsterindian

    Very well written. I am planning to get the Luminous Zelio with a 150Ah battery for 3 fans max and 2 tubelights and wifi router. Hope this will suffice. I am looking for at least 8 hours back up.

    • https://www.bijlibachao.com Abhishek Jain

      Hi,

      Your total wattage would be about 350 watts. Which mean even 500 VA will be more than enough. Zelio is 1100 VA which is almost double your requirements. So yes it will work, but it will be huge for your needs and you may even go for a smaller one. A 150 Ah battery will give you about 5 hrs backup if you use 300 Watts on a continuous basis. For 8 hours you would need more Ah (about 250-300 Ah). If you want to go for Zelio then try for a 200 Ah or 220 Ah battery (as it is a 12V inverter and can support only 1 battery).

    • Jerry

      so, what kind of inverter do you suggest sir?

    • https://www.bijlibachao.com Abhishek Jain

      You can go for Zelio, but go for a 200 or 220 Ah battery with the same.

  • Naveen Judah

    Hi Abishek,
    I am building a house with some outhouses in rural India. I expect cuts and will have diesel back up but if I want Inverter back up as another fail safe option maybe for a more limited option what should i go for given the following:
    MAIN HOUSE
    4 bedrooms eah with a 5 star fan anda 1 ton AC
    Hall with 2 fans 2 X 1.5 ton ACS
    LED lighting thought
    fridge
    freezer
    washing machine
    geyser

    GUEST HOUSE
    2 single rooms each with a fan led lighting and a geyser

    STAFF QUARTERS
    3 rooms each with a fan and led lighting

    Thanks in advance
    Naveen

    • https://www.bijlibachao.com Abhishek Jain

      Hi Naveen,

      For a setup with so many ACs, Fridge and geysers an inverter will not work. The power requirements will be too high to be fulfilled by an inverter. A Diesel generator set is a better option for this kind of setup. Inverter is good if the backup is needed for a few fans, lights and a fridge or TV. The moment you add ACs/geysers to it, an inverter will not be able to support it.

    • Naveen Judah

      Thanks Abhishek

  • Abhishek Yadav

    HI Abhishek,

    Your article is really very helpful, thanks for sharing my friend. I’m looking for Inverter which can run 2 fans, Laptop, 5 LED lights (9W each) and one TV of 42 Inch with at least 6-7 hours backup. Could you please let me know any good inverter satisfying my above needs and the cost for the same. Thanks in Advance.

    Thanks and Regards,
    Abhishek Yadav

    • https://www.bijlibachao.com Abhishek Jain

      Hi Abhishek,

      Your total wattage would be about 350 watts which means a 500+ VA inverter should be good enough. But because you need 6-7 hour backup which is kind of long enough for an inverter, so you need a bigger battery about 200-220 Ah. And to charge that big a battery fast enough, you need a bigger inverter and 500 VA would be slow. So you should go for a 900-1100 VA inverter with 200-220 Ah battery. Also go for a pure sine wave inverter. You can look at these inverter models:

      Luminous Zelio 1100 VA (Flipkart Link: http://fkrt.it/8MdkzTuuuN )
      Microtek UPS SEBz 1100 VA (Flipkart Link: http://fkrt.it/vjaSX!NNNN )
      Or Sukam Falcon+ (or ++) series. Sukam Shiny 900 VA is also good (Flipkart link: http://fkrt.it/vjk4Z!NNNN )

      Inverter would cost about Rs 5000 but battery would be about Rs 15-18K

  • parasuram

    hi Abishek,

    i need inverter and battery for my home 2 fans, 2 tubes, one Tv and laptop. what is the suitable buy and how much it my cost. i need atlest 7 hr backup.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage is about 400 watts. A 650 VA pure sine wave inverter should work well for you. Pure sine wave because you have electronic equipments. But 7 hrs backup is a difficult deal to fit in. Because for 7 hrs backup you need about 3 units of electricity (400×7) and for that you need to have two 150 Ah batteries. And to support 2 batteries you need a 24 V (12V + 12V) system. And the smallest 24V system would be about 1400 VA system. And the whole system would cost Rs 6000 (inverter) + Rs 20000 (two batteries).

      You can go for a smaller system to reduce the costs.

  • Sanjay yadav

    Hi Abhishek,

    I need Inverter & battery for my house 4 fans, led tv, setup box,home theatre, 6 cfl what is the suitable buy & how much it may cost ?
    I need at least 6-7 hrs of backup.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Sanjay,

      Your total power consumption would be about 700 Watts. Which means you would need about 1000 VA inverter. But your backup requirement is too high. 7 hours would be difficult unless you go for a 36V inverter which can have 3 x 12V batteries. Inverters typically are not that expensive but batteries are very expensive (about Rs 10000-15000 each). For about 5 hours backup you can go for a 1400 VA 24V inverter with two 200 Ah batteries.

      Some good models: Luminous Zelio 1700, Sukam Faclon+ (or ++) 1400 VA/24V models (in general Sukam has better efficiency models giving longer backups), Microtek SEBZ 1600 VA.

      Each 200 Ah battery would cost about Rs 15000-18000 and inverter would cost about Rs 6000.

  • Joshi

    Thanks abhishek for your valuable advise !!

  • Joshi

    Hi Abhishek,

    I need Inverter & battery for my house 2 fans, led tv, 2 tubelight & 2 cfl what is the suitable buy & how much it may cost ? thanks in advance for your reply …

    • https://www.bijlibachao.com Abhishek Jain

      Your total load would be about 400 Watts. So a 650 VA inverter should be good enough. Because you have LED TV, a pure sine wave inverter would be better. Inverter may cost about Rs 4000-4500 or so. You may also opt for a 850 or 900 VA inverter in case you want to add something in future. The main cost will be of battery. A 150 Ah battery can give you about 3-4 hrs backup. It would cost about Rs 10000 or so.

  • Ajay

    Dear Abhishek,
    I had absolutely no knowledge about the UPS/ Inverter and the batteries to be used. I came across your website and found lot of useful info. I plan to get a UPS home. I would be using 3 fans, 3 tube lights, 42″ LED TV, set up box, Laptop, router and a new fridge which has an inverter technology. Please help me with the right capacity of inverter and batteries to be used along with the good brand I can go for. Thanks in advance.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ajay,

      Total wattage of all the appliances would be about 900-1000 Watts. So I think a 1400 VA system would be better. 1000 Watts means in an hour you would consume about 1 unit of electricity (if everything is running). A 150 Ah battery can store 1.5 units of electricity. If you go for a 24V inverter, then you can connect two batteries of 12V each. This way you can connect 300 Ah in total (or more if you want). 300 Ah will give you 3 hours of backup. If you put two 200 Ah batteries you can get 4 hrs backup.

      So a 1400 VA/24V inverter would be better. 2×150 Ah or 2×200 Ah batteries depending on backup required. Please note charging will take more time if battery size increases. A 150 Ah battery would take about 10-12 hrs to charge up completely. 200 Ah will take about 15-18 hrs.

      Going for Pure Sine Wave inverter would be better as you have electronic to run.

      A single brand battery inverter system would be better as you get better service on it.

      Some good models: Luminous Zelio 1700, Sukam Faclon+ (or ++) 1400 VA/24V models (in general Sukam has better efficiency models giving longer backups), Microtek SEBZ 1600 VA.

    • Ajay

      Hello Abhishek….Thank you so much for all the valuable inputs. We have decided not to include the fridge as mentioned earlier. Ideally, we would use 3 CFLs, one 42 inch LED along with the HD Set up box, wifi D Link router, 2 fans only. I will have to soon make a decision to buy one. Please advise the necessary power capacity inverters and batteries I should go for. Thanks again.

    • https://www.bijlibachao.com Abhishek Jain

      Total wattage would be 70 + 60 + 25 + 5 + 180 = 340 watts. So a 450-500 VA inverter should be good enough. A 150 Ah battery can give you about 4 hrs backup.

      Go for a pure sine wave inverter of 500VA or more and a 150 ah battery.

  • Imsutoba

    Thanks for your favourable reply sir……iam very glad to hear from you……thanks again

  • Imsutoba

    Helo sir……iam very curious to buy a inverter of 1100vah and a battery of 150Ah ……please tell me that how much it will cost……how many hours it will take to fully charge 150Ah battery by the same inverter…..is my choice point of Vah and Ah is correct……i want to run
    (1)……one led bulb
    (2)……one fan
    (3)……one led TV and
    (4)……one set top box
    Please tell me sir……how many hours of back up i will get for that system?
    Which brand of inverter and battery is best for me?

    • https://www.bijlibachao.com Abhishek Jain

      1100 VA will be huge for your setup. LED bulb would be max 15 watts, fan would be 75-90 watts. LED TV would be max 80 watts (assuming huge TV), Set Top box would be max 25 watts (HD DVR box). Total in such case would be 200-250 watts max. That would need 250/0.7 = about 350 VA. So 1100 VA is huge for that. You can add many more things in 1100 VA.

      I think even if you want to have some buffer, about 650-700 VA should be good enough. And 150 Ah can store about 1.5 units of electricity. If you have 250 watts setup then it will consume 0.25 units in an hour. That means with 150 Ah battery you can get 6 hrs backup.

      If you want to go for 1100 VA then Luminous Zelio is quite popular. For 700 VA Microtek UPS SEBz 700VA is quite popular. Both are pure sine wave inverters which are good for you because you have TV/electronics to run. Sukam Falcon++ is also a great series.

  • Imsutoba

    Hlw

  • praveen

    The power details are as follows; Tube lights – 3 no’s, fans-2 no’s,LED TV-2 no’s.Power back up needed is 3 hrs.
    Which inverter do you recommend that i should buy? please tell me.-Praveen.

    • https://www.bijlibachao.com Abhishek Jain

      Ideally a 650 VA is good enough for the appliances, but for future addition of a few appliances, a 900 VA inverter would be good enough. Also because you have LED TVs, pure sine wave inverter would be better for their life. You can look at these two:

      Sukam SHINY 900VA/12V (Flipkart Link: http://fkrt.it/SfPL9TuuuN & Amazon Link: http://amzn.to/2kd6b5H )

      Luminous LZ1100SW (Flipkart Link: http://fkrt.it/SGLqYTuuuN )

      Microtek UPS SEBz 900 VA (Flipkart Link: http://fkrt.it/Soq~XTuuuN & Amazon Link: http://amzn.to/2kd42He )

      The 1st two have good efficiency. For 3 hours backup you need one 180 Ah battery with these. Exide or Amaron battery would be good.

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  • Shashank Agarwal

    Truly helpful…. I am glad i cam across Bijli Bachao website…regular used products but still so
    little knowledge about the same. Thanks..!!

  • Atul Kumar

    I am trying to choose between a semi tubular Exide battery and tubular Microtek. Exide costs more. What is the difference between semi tubular and tubular? What’s better and why Exide would be more expensive? Thank you.

    • https://www.bijlibachao.com Abhishek Jain

      In general Exide is a better brand for batteries than Microtek. Microtek is a good inverter brand. But it is better to buy Tubular batteries than Semi Tubular batteries. Tubular batteries will have a longer life. I would say go for Microtek Tubular battery.

  • Srikar

    Would a 1100 VA Inverter be sufficient to run a 750Watt Mixer/Grinder(to be used in a rare situation?). For a normal power cut situation it is sufficient to have a 1100VA UPS which only requires one battery. I want to avoid buying 2 battery system, so is this possible? As an alternate solution are there batteries made that provide a direct 24Volt output?

    • https://www.bijlibachao.com Abhishek Jain

      More batteries are required when you need longer backup. A single battery system gives lesser backup. It truly depends on how long you need to run appliances on the backup.

      750 Watt Mixer Grinder may or may not work on 1100 VA inverter. Depends on the power factor of the mixer grinder and also on the surge handling capacity of the inverter. Many inverters these days are able to handle high startup current of motors (especially those from top brands). You need to confirm the same from the dealer/manufacturer before buying.

  • Mohit Srivastava

    I have purchased a flat which has Generator backup for few lights and fans provided by the builder. What i need is to have the remaining lights and fans run on the Inverter which i’m getting installed separately. The twist being the need to have the Generator backed points to switch to Inverter if the Generator fails.Note that the Inverter AC Input does not have Generator backup and the Flat has 3 phase power supply, any ideas how can this be achieved ?

    • https://www.bijlibachao.com Abhishek Jain

      I frankly do not have much idea on it. A good electrician should be able to help you out.

  • Premkumar S

    Hi,
    For my existing Sukam 650 inverter, I want to buy 150AH battery. Supplier of battery suggest for 150 AH battery I should use a higher VA inverter. I dont want to change my existing inverter, which is in good working condition. My usage is limited. Your suggestion.

    • https://www.bijlibachao.com Abhishek Jain

      Technically there should be no problem in having a 150 Ah battery with 650 VA inverter. The only thing that could probably be the issue with the inverter would be that the charging current would be less. Low charging current can lead to longer time to charge for a higher Ah battery. But otherwise I do not see any challenge with using 150 Ah battery with 650 VA inverter.

  • C Vijai

    Hi Bijili Bachao Team,

    My 1kVa APC inverter recently spoiled and I am looking for a new inverter, I currently have two (2) new 150AH tubular batteries, please suggest me optimum inverter capacity to best make use of total 300AH available and also preferred brand of inverter make.

    (My usage, 28W CFL x 2 Nos.
    15W CFL x 6 Nos.
    8W LED x 3 Nos.
    Fans x 4 Nos.)

    Thank You

    • https://www.bijlibachao.com Abhishek Jain

      1 kVA is a lot for the appliances you have. But with two 150 Ah batteries the best option is to go for a 24V inverter so that you can connect the batteries in series and charge them faster. The smallest 24V inverter that I have seen is about 1400VA or 1.4 kVA. Sukam, Luminous and Microtek are leading inverter brands. Try to go for a pure sine wave 1.4 kVA inverter (check sukam falcon++).

  • KK

    Nice article, well explained

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  • anesh

    thanks for this post i understand a lot from it… i just need to confirm that ….i need a 430 ah battery ( 200ah +200ah + 100ah ) what kind of inverter do i have to buy …and i am in a place with longer power cuts daily

    • Rajendra S. Arakeri

      Hello Sir, I wanted to run a Desktop and a laser printer in my maruti van for DTP purpose etc., For which some person advised me to go for Interter and 12 Volts battery. So, pl. help in this connection that whether I should go with the advise as mentioned above or shall I have economic plans and how much I should invest and the model of the Inverter and tubular batter which runs atleast 7 hrs a day. Whether these can be installed in the Maruthi omini ? pl. confirm/advise me the best way to sort out the issue

    • https://www.bijlibachao.com Abhishek Jain

      The total wattage of desktop and printer would be close to 200 watts. So for 7 hours you would need a 150 Ah battery. Now as per your appliances a 300 VA inverter should be more than enough, but then smaller inverters do not have good enough charging current that you are able to charge a 150 Ah battery in the remaining time your car is standing. So it will be better if you go for a 650-700 VA inverter to get better charging current so that you have 7 hrs charge every day.

      It can certainly be installed in maruti omini, but then you will have to charge it using regular electric power when your car is not moving.

    • https://www.bijlibachao.com Abhishek Jain

      Depends a lot on VA value you need for your appliances.

      But here is the thing: you have 3 batteries then you need a 36V (12V+12V+12V0 inverter (else the charging time will be a lot if you go for a lower voltage inverter).

      Now it is a bad idea to mix batteries of different Ah because the lowest Ah value drives the output. So even if you have two 200 Ah batteries, one 100 Ah battery will drive the output and so you will get only half the output from your 200 Ah batteries. Better go for 3 numbers of 150Ah batteries.

      Finally, typically 4.5-5 kVA inverter are of 36V. So if you need 3 batteries, you will need to go for a big inverter.

  • Ashwant krishna

    Hello sir,
    I am planning to buy an Inverter or UPS for my small office that has 4 desktop computers, 2 small sized seeling fans & 2 tube light. I cannot offered to loose productivity & I need the system to be running at any cost. There is no frequent or regular power cut in my place, but can’t offered to take the risk when it happens. What would you suggest me. My 4 systems combined would approximately consume 400 W ( 100W * 4), 2 fans combined 150 W, Tube Light 100 W. So expecting a requirement of 650 W. Backup of at least 4 hours needed. I read your article completely & tried to work out the math, but I am afraid I may end up with wrong numbers & buy a underpowered or overpowered one. Also I read that u mentioned desktop requires faster switching to battery, so should I buy an UPS or Inverter ? Please give me your valuable suggestion & it would be great if you can mention the brand & model that I should buy.
    Thank you.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Aswant,

      850-900 VA inverter should be good for you. For 4 hours backup you would need 2 batteries of 150 Ah. If there are no frequent power cuts then you may put them in parallel (please note charging takes some time when you set them in parallel as the current flow gets divided into half). Else you may go for a 1400 VA inverter with 24V system where you can use two 150 Ah batteries in series. With 1400 VA you will have flexibility to add more appliances in future. But then yes there will be more electricity losses with a bigger inverter.

      UPS and inverter are terms used interchangeably these days as most inverters these days have instantaneous switching. However there are two kinds of UPS: online and offline. In one (online) the systems always work on battery and thus they never face any shutdown even when there is a power cut. In offline, the systems work on main line and switches to battery immediately when there is a power cut. Time of switching is important as that can determine if your PC will shut off or not. You may look at Sukam Falcon (or Falcon++) series as they have good pure sine wave inverters.

  • Sankar Muthiah

    Hi Abhishek, Thank you for the detailed article, very informative!
    I would like to buy an Inverter for home, usage would be 2 ceiling fans, 4 LED bulbs. As per your response below, I think 500-600VA Inverter and 150Ah battery would be enough, I am looking to go with Su-Kam (Indian brand). Please share your thoughts on the Models I should look for? Thank you!!

    • billy

      I DONT KNOW ANYTHING ABOUT THIS STUFF

    • https://www.bijlibachao.com Abhishek Jain

      Hi Sankar,

      Inverter is one appliance where you will mostly get Indian brands :). It is a space dominated by Indian manufacturers. And Su-kam is certainly one of the leading manufacturers and they make great inverters. Their Falcon range (and specially the Falcon++) is a really good range of inverter with energy efficiency and lot of advance features like ATC (Automatic Temperature Compensation) which are good for battery life. They are pure sine wave inverters that will not have any humming sound and will be good in general for your appliances (and I do not think pure sine wave inverters are much expensive as compared to modified sine wave inverters).

  • billy

    yes I am thing wow that could be bad but here goes I am wonting to get two 10k inverters and tie one to each side of my 240v 120 to each side that should keep things cool my ac is 240v four tons while I run my ac also tv and lights it should work I think I will use many battery’s I have wind and solar power I am also a long way from anything wright now I am in south Carolina but all this is going to my home in the Philippines also there we don’t have gas or fuel not where I am and cost too much to bring it in I really need help with what to do thank you happy new year

  • Giresh

    I am planning to Buy Luminous Zelio 1100va sine wave inverter and Luminous 18048 Battery (36m+12m Warranty). Would it be a good combination. Or I should Go for Amaron Battery & Inverter Combination ?

    • https://www.bijlibachao.com Abhishek Jain

      Luminous is a better brand for inverters.

  • Arun V

    Can i buy Exide EXIDE 1050 DSP PST UPS Inverter. Because im panning to buy exide ivatubular it500 plus. I need comments about exide 1050 va inverter. First i planned luminous zelio 1100 but both inverter and battery should be same company na tat logic. Shall i go to exide inveter or luminous pls suggest.

    • https://www.bijlibachao.com Abhishek Jain

      Inverter wise luminous is a better brand. I think luminious zelio with it’s battery would be a better choice.

  • Arun V

    I want to buy an inverter my requirements are 2fan,1 43″ led tv, 3tube lights, 2 cfl, 1 hometheatre ,1 airtel dish, 2 mob charger. I think 900va is enough for me . Suggest any good inverter my chioce is luminious zelio 1100 , sukam falkon + 1100. And suggeat me any good exide inverter because im planning to buy exide invatubular it500 plus 150ah. Pls reply. And tell can we buy luminus 150ah iltt18048.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would not be more than 500-550 W which means even 700-750 VA should be good enough. With 900 VA you will be able to add few more appliances in future. Sukam and Luminous both are good brands but Sukam Falcon+ is a great model. You can certainly go for it. With 150 Ah battery you can get 3-4 hrs backup. Exide and Amaron are top brands for batteries, however, these days, buying a single brand battery+invertor combo gets you a better warranty and AMC deal. Go for something with 3-4 years warranty.

    • Arun V

      Thank u… Fr reply. Suggest me exide inverter in the range of falcon or zelio. I enquired iabout exide battery but they say inva tubular it500 is now upgraded to it500 plus. Is this true. Shall i buy zelio 1100 with luminous battery as u said both should be same company.

    • https://www.bijlibachao.com Abhishek Jain

      I think Zelio with luminous battery would be a good choice.

  • nick

    Hello i have a query, i have a Microtek Sebz 1500va inverter.. Microtek lists it as a Pure Sinewave Inverter

    My question is , Is it actually a “True” Pure sinewave inverter ? or stepped/modified/approximate Sinewave marketed and sold as Pure sinewave ?

    Is it safe to run PC with Active PFC PSU on this inverter on battery for long hours ? i have read using active pfc with anything other than pure sinewave is very harmful

    thanks

    • https://www.bijlibachao.com Abhishek Jain

      Hi Nick,

      I guess you meant SEBz 1600 VA ( this one: http://www.microtekdirect.com/upssbz16/ ) ….. because I could not find 1500VA in the series. However, the manufacturer does mention PURE SINEWAVE as the output waveform and I have no reason to doubt a reputed manufacturer. In general if it is a modified sinewave, the manufacturers mention modified sinewave or just sinewave on the model. But here it is mentioned PURE SINEWAVE.

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  • gurpal

    hi abhishek,…very informative article…..just need to power 1 wifi router 12v/0.5A….backup time no issue…is there other alternative or small invertor..please reply..

    • https://www.bijlibachao.com Abhishek Jain

      wifi router just needs about 5W power. You may go for the smallest inverter that you may get in the market.

  • Shyamsundar R

    Hi,

    I have Luminous Eco Volt 1050 with Exide TM500 15AH battery. It is just one month old and not giving back up more than 3 hours.

    It is connected to two Desktop PC’s with 19″ LED monitors, one Wifi Router, two CFL (20Watts), and a Ceiling fan. It was only giving backup for 2 hours
    only.

    When the power went off next time (inverter was showing battery was full charged), i switched OFF the CFL and Fan. used only two Desktop PC’s with 19″ LED monitors. But still it was only giving backup for 2 to 3 hours only.

    Then i noticed that the battery selection switch was in the wrong position – in the Flat plate. I have changed that to Tubular. Back up is slightly increased to 3 hours.

    All these time the battery charging current selection was in Medium as my battery is 150AH.

    One of my friend is using Luminous 650VA inverter with 120AH Battery, and he is getting 6 to 7 hours backup. I wonder what went wrong with my
    Inverter.

    1) is my choice of Inverter (900VA) and battery (150Ah) is right ?

    2) wheather the wrong battery selection would have ruined my battery ?
    3) shall i set the battery charging current to High?
    4) shall i call my vendor / service person to solve the issue ?
    5) Please, suggest how to improve my backup time.

    Thanks in advance.

    • https://www.bijlibachao.com Abhishek Jain

      Backup hours depend on the wattage of appliances being run and the number of hours they are run for. A 150 Ah battery can store 1.5 units of electricity and 120 Ah battery can store 1.2 units of electricity. If you put 100 Watts bulb on 150 Ah battery it should run for 15 hrs (100 W x 15 h = 1500 Wh = 1.5 kWh or 1.5 units). While if you put a 50 watts bulb on 120 Ah battery it will run for 24 hrs (50 W x 24 h = 1200 Wh = 1.2 kWh or 1.2 units).

      So you can see that a 150 Ah battery can give just 15 hrs backup for 100 Watts bulb while a 120 Ah battery can give 24 hrs backup for 50 Watts bulb. So you need to check the wattage the other person is using and time for which the appliance is being used.

      Now your PC would be about 150 Watts + 150 Watts (for 2 PCs). Fan about 75 Watts (1 Fan). CFL about 25 Watts (1 CFL). Router 5 watts (1 Router).

      Total would be about 400 watts. In 1.5 units it should run for 1500/400 = 3.75 hrs. Now this is assuming that inverter is 100% efficient. However, it should be about 85% efficient, so about 3 hrs backup sounds good for your setup.

    • Shyamsundar R

      Thanks a lot for immediate reply.

      Other person (my friend) is using a Desktop with LED monitor, and CFL 11W and a fan. when he connects all the above he gets 4 hour. when he connects only a desktop, he gets 6 hours.

      Actually he is my colleague. I have selected the Inverter for our office, which is Luminous Eco Volt 1050 with Exide TM500 15AH battery. His home inverter is Luminous 650VA inverter with 120AH Battery (local unbranded).

      He doubts the selection and also he doubts the quality of the battery. Now i am into convince him. Sorry to bother you.

      And shall i set my battery charging current as ‘High’ (in manual its mentioned that for 150Ah – medium and for 165 to 200 Ah – High)

      Once again thanks.

    • https://www.bijlibachao.com Abhishek Jain

      You can keep it at ‘High’ charge. There should be no problem with it. Your selection of inverter and battery is fine.

  • muthu kumar

    HI i need a inveter for :-
    5 fans,
    10 lights,
    1 wifi router,
    1 tv and
    All plug to put a charger or whatever( iron box, hair heater,etc…),
    For 10-12 hours

    • https://www.bijlibachao.com Abhishek Jain

      10-12 hours is a lot for an inverter. It will be better if you go for a Diesel Generator set. You will need huge setup to get 10-12 hrs backup and then again charging the same to give a 10-12 hours backup will need a lot of time (which will be difficult considering you will have 10-12 hours power cuts). I would suggest you to go for a DG set.

      Also if you use heating/cooling appliances like iron box and hair heater, it would significantly increase the size of the system as these appliances need a lot of electricity. Also sizing of any system will be difficult without knowing all these appliances that you will use and also without knowing how long will you use them in those 10-12 hrs.

  • Harshad Deshpande

    Hi
    Thanks for the post – Had a query. Two months back I had bought a new Exide Powersafe Plus 100ah 12V battery Maintenance Free for my existing APC inverter 800 VA. Unfortunately the inverter is gone and looking at replacing with Luminous Eco Volt 1050. The question is the specs says it supports 120ah to 220ah. Will this battery work without issues with Luminous Inverter ?

    • https://www.bijlibachao.com Abhishek Jain

      Your luminous inverter is rated for 1050 va. You can connect 100 ah 12V battery but limit the load not to increase 800 va. The back up will only be of around 1 hr. Technically there should not be any problem.

    • Harshad Deshpande

      Thanks for the clarification! Did not want to get rid of a brand new battery- maybe the next one would be a tubular . Also which one would you recommend between Luminous Eco Volt 1050 Sine Wave Home UPS and Luminous Zelio 1100 Sine Wave Home UPS if budget is not an issue and with respect to features?

    • https://www.bijlibachao.com Abhishek Jain

      Eco Volt has more power output and more charging current. Will charge the battery faster.

    • Harshad Deshpande

      Thanks for all your assistance in clearing my doubts. Really appreciate it!

  • mitra

    Very Informative post. I have decided for Luminous 1050 ecovolt pure sinewave inveter. However i’m confused about the battery. Luminous battery 150 tall tubular does not seem to have god reviews. Should I go for branded battery manufacturers like exide or amaron? If so which one would you recommend? Also if inverters & battery are of different companies , does that leave scope for the companies to blame each other in case of any issue?
    Appreciate your response.

    • https://www.bijlibachao.com Abhishek Jain

      You have better chances of getting good warranty with regular maintenance by the company if you go for same brand battery/inverter. Otherwise both Exide and Amaron are top brands. You can go for any one of them.

      And certainly if the two are of different brands then in case of issues you will have to deal with two different engineers who “may” put blame on the other product.

  • https://www.bijlibachao.com Abhishek Jain

    एक बार आप अपने inverter को भी चेक करवा लेना|

    • Pankaj Maurya

      ओके अभिषेक जी।

  • https://www.bijlibachao.com Abhishek Jain

    बिलकुल सही रहेगा|

  • http://technosphereindia.in/ Techno Sphere Inc

    very nice post, thanks a lot

  • Varun Sharma

    Very insightful Article.. Thanks a ton. <3<3

    • https://www.bijlibachao.com Abhishek Jain

      I am glad that you found it useful.

  • Swapnil

    What will be the suitable VA rating of inverter and battery size for 6 hours backup whereas “I use 2 ceiling fans,LED TV 75 cm,Led bulbs (9Watts X 5), 1 Livpure touch plus RO purifier, 1 Refrigerator, I Occasionally use 1 mixer grinder,1 laptop & 1 oven at present”.
    What should be the UPS VA rating and battery capacity for house?

    Also please suggest me one invertor as well.

    • https://www.bijlibachao.com Abhishek Jain

      There are 3 appliances in your list that are high wattage (high VA) appliances:

      1) Mixer Grinder (has a motor that would need huge amount of power to start).
      2) Oven (High power needed for heating)
      3) Refrigerator (Typically a high power appliance unless you have a modern inverter technology refrigerator).

      It will be difficult to size an inverter/battery system to run these. If you really want to run these and have 6 hrs backup then it is better to go for a DG (small Diesel Generator Set).

      At best you can accomodate a refrigerator in the setup (and it will be easy to do so if it is inverter technology refrigerator). Still 6 hours will be long (3-4 hours would be easy).

  • Gagan Grover

    sir,
    I have 850va sukam inverter. is it ok to buy 200mah tulular battery ? (I think additional cost of nearly Rs1000 dose not matters). kindly suggest brand. I also have the plan to buy solar panel of 500-600w after 5or6 months.

    • https://www.bijlibachao.com Abhishek Jain

      I guess you mean 200 Ah not mah … mah is too small. Amaron, Exide are good battery brands. You can even opt for Su-kam’s batteries.

  • A Chakra

    What will be the suitable VA rating of inverter and battery size for 5 hours backup whereas “I use 6 ceiling fans(32watt),LED TV 32 inch,Led bulbs(24watt x 6,18watt x 4,15 watt x4 and 7watt x 4) at present”.
    What should be the UPS VA rating and battery capacity for house?

    • https://www.bijlibachao.com Abhishek Jain

      Your ceiling fans need 6 x 32 = 192 Watts (Just make sure that the fan is really 32 watts)
      Your TV would need about 50 watts
      LED Bulbs would need 24×6 + 18×4 + 15×4 + 7×4 = 304 watts.

      So total is 192 + 50 + 304 = 546 watts.

      VA value needed would be about 546/0.75= 610 … so roughly 650-700 VA would be good.
      For 5 hours you need 546 x 5 = 2730 Wh storage …. so you need about 300 Ah for batteries ….. but the biggest battery available is 220 Ah ….. However, I doubt you will use everything together when there is a power cut. So you may go for a 700 VA inverter with 200-220Ah battery.

  • MALLIKARJUN

    I WANT TO KNOW HOW MUCH CURRENT WILL CONSUMED FOR MONTHLY OF 2BKV UPS(150AH 2 BATTERY AND 2KV UPS)

    • https://www.bijlibachao.com Abhishek Jain

      Depends a lot on how much your UPS will be used and the time for which it will be on when there is no power supply.

  • Nedumije

    Thanks for this great post. I learnt quit a lot from it.

  • Amrita

    Hi, I would like to buy an inverter which should be able to run an oxygen concentrator along with 4 tubelights and f celing fans. Which one should I buy?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Amrita,

      Difficult to comment as I am not aware of power consumption of oxygen concentrators.

  • Chandan

    Hello sir , I want to buy a new battery and inverter for my home that can backup atleast 4- 5 hours when using 2-3 fan , 4-5 led 9w bulb , 1 led tv 24 inch , dishtv hd setup box.plz suggest me which battery and inverter I can use and how much capacity required and which brand is best……plz reply me fast …..

    • https://www.bijlibachao.com Abhishek Jain

      A 500-600 VA inverter with 150 Ah battery should be good enough for you. Su-kam, Luminous, Microtek are some of the leading inverter brands while Amaron, Exide, etc are some of the leading battery brands.

  • Apoorva Apte

    Hello Team,

    Thank you for all the information on the site: It is really helpful. Can you please answer this question?
    While preparing a list of all appliances in a house, how should one assume the energy consumption of an inverter, of say 1100 VA? I read somewhere on your page that assuming 85% efficiency of a 1000VA Inverter, it will consume around 150 W which for 10 hours means a consumption of 1.150 Units.

    Now while calculating per day, does the inverter always consume around 15% power during 24 hours of its operation? Should the power consumption be directly calculated for 1.1 kVA as (0.15 x 1.1 x 24 i.e.) 3.96 units? Or is the consumption lesser since the batter may not always be charging?

    Kindly advice.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Apoorva,

      Every inverter will have charging efficiency, discharging efficiency (efficiency while in use) and “no load” power consumption. The 85% mentioned on the inverter is just the discharging efficiency (or efficiency of inverter while in use). However, you also need to know the charging efficiency and no load power consumption.

      Now firstly there are very few inverter manufacturers that declare any of these numbers. BEE has recently started rating inverters on BEE star rating and you can read more about it on this link: https://www.bijlibachao.com/appliances/energy-efficient-star-rated-power-inverters-india.html

      Total power consumption of inverter also depends on the size of battery that you connect to it. That is because battery is the one that stores energy. Inverter just does the conversion from DC to AC. If you have bigger and more batteries then they will store more energy which means the total power consumption will be more.

      If say you have two batteries of 150 Ah. Both will store 300 Ah energy together. 300 Ah is 300×12=3600 Wh or 3.6 kWh or 3.6 units of electricity. But then some losses will be there while charging it (charging efficiency) and some while converting it to AC (your 85% comes in here). So if your inverter is 85% efficient then you will be able to use only 85% of 3.6 units in real applications. But then some % will be lost even in charging. Although it is not mentioned by manufacturers, based on the feedback that I have from some manufacturers, it is about 80% (can be less as well depending on how good the design is). So you loose 20% while charging and 15% while using the stored.

      So if 3.6 is stored then total consumed from mains = 3.6/0.8 = 4.5 unit (from the mains)
      What you use is 3.6×0.85 = 3.06

      And there will be no load losses which are about 7watts for the most efficient inverter that we found (it can be more for other inverters).

    • Apoorva Apte

      Thanks a lot for the reply! It was helpful.

    • Apoorva Apte

      Hello Abhishek,

      I went through the link which you had posted in the previous email, but got stuck at one point. In the Section “How Much Is The Total Power Consumption of a typical BEE star rated Inverter in a Day?”, it is mentioned that “Without power cuts, a 500 VA system at 0.8 power factor would have consumed 500 x 0.8 x 3.25 = 1300 Wh or 1.3 units of electricity.”

      I could not understand what the figure 3.25 indicates. Can you please clarify?

    • https://www.bijlibachao.com Abhishek Jain

      My bad that I mentioned 3 hrs 15 mins as 3.15 at the top of the paragraph. 15 mins is 0.25 hrs so 3 hrs and 15 mins is 3.25 hrs.

      So if an appliance consumed 500VA and has power factor of 0.8 then in 3.25 hrs it would consume 500×0.8×3.25 Wh.

    • Apoorva Apte

      Oh and even i missed it. :) Thanks.

      I still have a few doubts. Please refer to the following:

      In the Example which I referred to, the two situations are with and without power cut.
      I assume that the base situation is that the Batteries are fully charged & as assumed in the example, the charging and AC-DC conversion efficiencies are not considered.

      Case 1: Now when there is a power cut, the Inverter shall draw 7 W during the no load i.e. 20 hours and 45 minutes. i.e. 0.145 Units (as shown i the example).
      Plus it will require to replenish the charge which has been used up by the Battery during the power cut (3.25 hours) i.e. 500 VA x 0.8 x 3.25 hours = 1300 Wh = 1.3 Units
      So total consumption = 0.145 + 1.3 = 1.445 Units

      Case 2: And in the case with no power cuts, the inverter shall consume 7 W x 24 hours = 0.168 Units

      What i mean is, in the situation when comparing the power consumption with and without power cuts, should the power consumption be considered in the above manner?
      So basically once the batteries are charged and there are no power cuts, does the inverter only consume 7 W (No load power)?

      Kindly help me out!

    • https://www.bijlibachao.com Abhishek Jain

      In an ideal situation, yes the inverter should consume only 7W power in no load (this is the power require. But then there is trickle charge/discharge that keeps happening on the battery (the amount depends on the efficiency and age of the battery) which will be additional power. But for a new battery it should be significantly low as compared to 7W.

      And yes, you compare the two scenarios in the way you have mentioned.

  • Saket Agarwal

    Sir how much electricity can be saved in a month if i replace all the three CRT monitor with with LG crt. My CRT monitors are working fine. Would you suggest to replace them with LED / LCD ??

    • https://www.bijlibachao.com Abhishek Jain

      A typical 24 inch CRT TV consumes 150 watts and a LED TV of 24 inch consumes just 30-35 watts.

  • Haroon

    Zelios 1000VA + luminous iltt 26048 220AH
    Or
    Zelios 1000VA + Exide it500 150Ah
    Or
    Zelios 1000VA + Amaron crtt 150 AH

    Which combination is good option?

    Note – I already have zelios 1000VA

    • https://www.bijlibachao.com Abhishek Jain

      The combinations look strange. One battery is 220 Ah and others are 150Ah. The backup provided by 220 Ah will be more than the backup provided by 150Ah. If you need more backup (longer hours) then go for 220 Ah battery. But the charging time of 220 Ah will also be more (almost 50% more than 150Ah). In general Exide and Amazon are good brands for batteries.

  • Abhishek 999

    sir could you please suggest a good ”Online UPS” for my 50 inch led tv? im confused many ups products dont even have in description if they are offline or online….i just want to protect my tv from sudden power failures how many VA capacity shud i take…suggest a good one thankQ sir.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Abhishek,

      Any UPS for Computer should be good enough for TV as well. Su-kam, Luminous, Microtek are some leading brands. A TV is just 50-80W so even a 100-150VA should be good enough.

  • SHANIA RashiRashid

    Hi, i am currently running a computer coaching centre but due to frequent power failures it is effected badly plz suggest me a inverter n battery which can support 10 computers 2 fans 2 led lights up to 2-4hours during power failure.

    • https://www.bijlibachao.com Abhishek Jain

      Each computer would be about 150 watts so 1500 watts total for computers. Two fans would be 180 watts. 2 LED lights would be about 40-50 watts. Total would be about 1720 watts. So a 2.5 kVA inverter would be good. Total 6.8 units of electricity will have to be stored for 4 hours. So three 220 Ah batteries would be needed. Because 3 batteries would be needed you need a 36V inverter. You should go for a 2.5 kVA Pure Sine Wave Inverter (pure sine wave because you have electronics to run). You can check Su-kam Fusion i or EXIDE HIGH 2.5KVA or Microtek Sinewave Multi Inverter 2.6 KVA

  • Abhishek 999

    My 50 inch LED tv frequently goes off abruptly from power failures which one should i choose sir Invertor or UPS? also tell me will they protect the TV like a stabilizer? plz suggest a good model to buy.

    • https://www.bijlibachao.com Abhishek Jain

      An online UPS would be a better choice for this. It can also provide voltage stabilization.

  • Pankaj Maurya

    बहुत बहुत धन्यवाद् अभिषेक जी… लेकिन मुझे एक जानकारी और चाहिए.
    12 वोल्ट 1100va के इन्वर्टर के साथ मैं 120ah की बैटरी चला रहा हूँ . लेकिन लोड ज्यादा होने की वजह से मुझे बैटरी की कैपसिटी बढानी है… तो अब मैं बिना इन्वर्टर बदले कितने AH की बैटरी और लगा सकता हूँ…. ?

    • https://www.bijlibachao.com Abhishek Jain

      इन्वर्टर बदले बिना आप 200 Ah या 220 Ah की बैटरी लगा सकते हो| वैसे तो उसमे भी चार्ज होने में थोड़ा ज़्यादा टाइम लगेगा पर दो बैटरी parallel से कम लगेगा|

    • Pankaj Maurya

      अभिषेक जी काफी मंथन के बाद मैंने exide inva tubular it500+ बैटरी ले ली है जिसको microtec 1130va इन्वर्टर के साथ लगाया है। लेकिन मुझे लगता है कि बैटरी बैकअप नहीं दे रही है। क्या आप बता सकते हैं कि 100 watt के लोड पे मेरी बैटरी कितनी देर तक बैकअप देगी? प्लीज सर जी, रिप्लाई देना।

    • https://www.bijlibachao.com Abhishek Jain

      exide inva tubular it500+ तो 150 Ah की बैटरी है| इसका मतलब इसे लगभग 1.5 unit स्टोर करना चाहिए| 1.5 unit में 100 watt को 15 घंटे चलना चाहिए| अगर नहीं दे रही है तो इसका मतलब यह भी हो सकता है की आपका इन्वर्टर ठीक से चार्ज नहीं कर रहा है|

  • elton Rodrigues

    hi can you suggest me a inventor for 3 fans fridge 2 lights and tv run for 4 hrs at least. brand that i can go for

    • https://www.bijlibachao.com Abhishek Jain

      A 1100 VA inverter (pure sine wave) with a 200 Ah battery should work well for you. You can check Sukam Falcon Plus 1100 VA inverter.

    • elton Rodrigues

      thanks a ton

  • Pankaj Maurya

    Sir please help me.. Mere pas microtec 12 volt 1100va ka pure sine vave inverter hai. kya mai uske sath 120ah aur 150ah ki 2 battery parelol me connect kar ke chala sakta hu? kya 1100va ke inverter se 2 battery charge ho jayegi? please sir reply jaldi karna. thank you.

    • https://www.bijlibachao.com Abhishek Jain

      you should not mix two batteries of different AH values because the output will depend on battery with lower AH. So even your 150 Ah battery will be as good as 120Ah. Also when you connect in parallel, the charging time doubles up as the current to each battery becomes half. Typically charging current is 10-13 Amp. At 10 Amp a 150 Ah battery will charge in 15 hrs. If you put it in parallel, then it will get just 5 Amp. So time to charge will become 150/5 = 30 hrs.

  • santosh Dogra

    I have 12V
    100WATT
    5.5 AMP MAX CHARGING CURRENT
    POLYCRYSTALLINE MODULE
    This sufficient for 100ah battery?

    • https://www.bijlibachao.com Abhishek Jain

      100 Ah battery can store about 1 unit of electricity. 100 watt module can generate max 0.4 units of electricity in a day. A lot also depends on how frequently will you discharge the battery.

  • Kunal

    Thank you for the info.
    Do you have details wrt to the efficiency of the popular (Microtek, Su-kam, Exide) inverters in battery backup mode?

    • https://www.bijlibachao.com Abhishek Jain

      BEE has just started rating inverters. There is only 1 BEE star rated inverter from Su-kam which is a BEE 4 star rated with 89% efficiency. For others, data is not available as they have not got rated by BEE.

  • Rahul

    sir, if my requirment is low about 800VA , with 12v 150ah battery. what if i use 1800VA inverter?

    and can i use one 12v battery with 1800VA / 24v inverter? [ later after 6 month i will add one more battery , buy 2 battery together is little costly for me ]

    • https://www.bijlibachao.com Abhishek Jain

      You cannot use just one 12V battery with a 24 V inverter. Because it is a 24V inverter, you need two batteries.

      Also you can certainly use 1800VA inverter for 800 VA requirement, but you just need to know that the bigger the inverter, more is its electricity consumption. So always try to optimize the size. If in future you plan to use 1800VA then it is fine. But your electricity consumption for inverter will not reduce a lot if you use it just for 800VA.

  • Richard

    Hi Abishek,
    I plan to get a 24V Inverter with Battery System with 2 batteries of 100Ah connected in series. I plan to draw an average of 300w for 6 hours. Will this system accomodate my requirements? I would not want to discharge the batteries beyong 50%, if so what would be the maximum time I can run the inverter before the batteries start discharging beyong 50%.

    Thanks in anticipation

    Richard

    • https://www.bijlibachao.com Abhishek Jain

      300 W for 6 hours would mean 300 x 6 = 1800 Wh or 1.8 units. A battery of 100 Ah can store a max of 1 unit and not all of it may be useful. So in 6 hours you will extract the maximum out of your batteries.

    • RAJEEV VISHNOI

      i have a doubt. 100ah battery give 1 unit when connected to 12 v system. here system is 24 v . it should give 2 unit.

    • https://www.bijlibachao.com Abhishek Jain

      Does not work like that. Suppose you have a tank that can store 100 lts water and it has 1 tap. If you add another tap then it will not give 200 lts water. If storage capacity is 100 lts, the tank can store 100 lts. Similarly a 100 ah battery has storage capacity of 1 unit, then it can store only 1 unit.

    • Rajeev Kumar

      But here two batteries are connected means two tanks.

    • https://www.bijlibachao.com Abhishek Jain

      If you have two batteries then yes you will get 2 units.

  • Anurag

    Hi Abhishek,
    Is it possible to use double battery inverter using a single inverter? I mean can an inverter to higher capacity will be used with a single battery inverter. Later on when consumption increased then put the second battery. Also, if yes then suggest some good solution for this

    • https://www.bijlibachao.com Abhishek Jain

      Hi Anurag,

      Every inverter has a fixed battery voltage. It is in multiple of 12 (as batteries are 12V batteries). So an inverter can be 12V, 24V, 36V, 48 V….. A 12V inverter can be run only on a single battery. You cannot change it to 24V (or a system of 2 batteries). You can add batteries in parallel (in electrical there is a concept of parallel and series, if you do not understand it, then ask any engineer friend) to have 12V out of 2 batteries, but if you add batteries in parallel then charging time will become double.

      So theoretically you can add another battery but then charging time will be double as the current flowing through the system will become half for each battery.

  • Sethu Subramanyam

    Hello Sir,
    I need your able guidance in choosing the right choice of inverter and battery for my requirement. i need to use a dialysis machine at home and this procedure will last 8 to 10 hrs. I use a automated peritoneal dialysis machine of Baxter which specifies its consumption as 1KVA. As this medical procedure cant be stopped in the middle, i need to arrange for a backup of 08 to 10 hrs in case the power is not restored the whole night. So please suggest me the type of inverter and battery that should be procured to suffice my requirement. Thanks in advance….(my mob: 8904628004)

    • https://www.bijlibachao.com Abhishek Jain

      You should better go for a Diesel Generator Set as 1 KVA inverter will not be able to to provide backup for 8-10 hrs.

  • Avik

    Hi Abhishek,

    Need an info whether IT 500 or Solar C10 what will be best in terms of longzivity

    Regards\Avik

  • sivaprasad

    Hello abhishek sir,
    I have 650va exide inverter and exide 100ah battery..i was these combination are used since 2014 april till now some days i was noticed that battery was drained so quickly.its about only half an hour backup. I better to with new battery and i planned to buy 150ah tall tubular battery should this is suitable for 650va inverter..? Plz which battery sholud i go…plz suggest me
    My requirements
    2 fans
    1 tube light
    2 led lights
    1tv
    2 cfls
    Thanks in advance

    • https://www.bijlibachao.com Abhishek Jain

      2 fans would be 180 watts
      1 tubelight would be 50 watts
      2 LED lights (assuming 10 watts) would be another 20 watts
      1 TV (assuming CRT TV) would be 150 watts
      2 CFLs (assuming 23 watts) would be another 46-50 watts.

      Total esitimate (pessimistic) would be 450 watts. A 100 Ah battery would store about 1 unit of electricity so it should give max 2 hours backup. 150 Ah would give 3 hours backup.

      By the way have you properly checked the fluid levels of your existing battery? If it was maintained properly, it could have lasted about 6-7 years. You can still get the specific gravity of the fluids checked and see if it is low. Try to get an engineer to fix your existing battery.

  • Anil

    Hello Sir, although the article is crystal clear i am very bad at math. Can someone please suggest me an affordable solution to run a laptop and a wifi router for 6hrs? which inverter and how much capcity battery is required

    • https://www.bijlibachao.com Abhishek Jain

      A laptop would be max 60 watts and wifi router would be 5 watts. So total of 65 watts. You will need about 40-50 Ah battery for 6 hours. An ideal inverter would be something like Su-kam micron Digital UPS of 250VA.

    • Anil

      Thanks alot abhishek ji

  • Syed Ashfaq

    Hay Abhishek,

    I have seen you comments below was very helpful. still to have a cross check with you.
    Need a UPS/Inverter for home with below requirements

    2 Tube-lights
    2 Fan
    2 CFL bulbs
    32” TV with Set top box and WIFI modem’s
    1 refrigerator 350lts
    2-3 Mobile charging points
    1 Laptop
    for buffer add tube-light/Fan/Mixer grinder. just buffer.
    assuming the time of usage could be for 4-6 hours

    Could you please suggest a good and low maintenance ups/inverter with best battery in market.

    appropriate for the help in advance
    Sayyed

    • https://www.bijlibachao.com Abhishek Jain

      Hi Sayed,

      Appliances like Mixer Grinder, Refrigerator or anything that has a big motor need high current to startup. And high current means that the size of inverter increases significantly. If you want something that is reasonable, then you should not add such appliances in the mix (even as a buffer). Because they cannot be supported easily with smaller inverters.

  • Shivraj Ingle

    Dear Abhishek Sir,

    my requirement

    3 Led Bulb 7 watt
    1 CFL Bulb 7 Watt
    1 Ordinary Fan 70 Watt
    1 Computer with 19″ LCD used as tv also
    1 tata sky settop box
    1 lg 215 ltr refrigerator
    1 Brother 430 printer
    1 lamination machine rarely used in week for 1 hrs

    pls suggest my total consumption and best option for 4 hrs.

  • Dilip

    My requirements
    55 in oled tv 100w
    Yamaha AV reciever 150 watts
    Panasonic bluray player 20watts
    2x 9watts led lights
    I don’t want much backup, but should be able to power off the devices manually.
    Which ups do you recommend
    Thanks
    Dilip

  • Bheemsain Tekkalaki

    Hi sir, what’s the difference between tall tubular and short tubular? I am planning to go for Luminous 100 va short tubular and my requirement is a back up for 2 tube lights, and 2 fans for around 4 hours. Kindly suggest.

  • pavan

    I have a tractor battery and it uses seasonably. Can i use it as a inverter battery. It is 88ah power reading. If it is possible then suggest for best inverter.
    Plz

  • darwin

    Hi ji, I am having below requirements,
    #3 super fan, #2 ordinary fan
    #7no of 22w syska led tube light
    #5no of 18w led bulb (China brand)
    #1laptop
    #1wifi Hotspot
    #3mobile charger
    #May use mixer
    #No TV as of now, but we may purchase in future.
    However all will not run simultaneously,
    kindly suggest me for the inverter and battery capacity to be purchased with company.
    Any good SOLAR or hybrid model?

  • Saket Agarwal

    Please suggest how to judge which battery is good in same brand with same Ah and same warranty. As Exide has lot of options like—

    1. Inva Tall – 150 Ah with 36 Months Warranty
    2. EL Master — 150 Ah with 36 Months Warranty
    3. IT 500 – 150 Ah with 36 Months Warranty
    4. Inva Smart — 150 Ah with 36 Months Warranty
    5. Inva Red — 150 Ah with 36 Months Warranty
    6. Inva Master — 150 Ah with 36 Months Warranty
    7. Inva Go – 150 Ah with 36 Months Warranty

    • https://www.bijlibachao.com Abhishek Jain

      Hi Saket,

      A very good question, but frankly we do not have a detailed post yet to give you an idea on how to choose the battery. Exide has INVA batteries that they say are meant for use with inverters. Different batteries have different features: some have wheels (for easy movement), some have battery management system while some have their new technology “Torr Tubular”. As far as backup is concerned, every 150 Ah battery should store same amount of electricity. But then there are different features that can aid in different things. You can check their page that has the details: http://www.exideindustries.com/products/inverter-batteries/tubular-inverter-batteries.aspx#inv ….. we will surely try to come up with writeup on selecting a battery.

    • Saket Agarwal

      Its ok abhishek ji, Anyway thanks a lot. I must say, your reply to all post are really helpful to all of us.

  • Saket Agarwal

    Sir pls suggest, which would be better deal – Normal Tubular Battery or Gel Tubular -Maintenance free Battery. On Exide Battaries they are providing 36 months ( 3 Years ) Warranty on Normal Tubular Batteries with 150 Ah ( Exide EL Master / IT 500 / Inva Tall where on Gel Tubular -Maintenance free Batteries (Gel Magic) 150 Ah they are providing 48 months ( 4 years ) Warranty. Price difference is approx Rs. 2500. pls guide which would be a best one with maximum life and long Backup with minimum electricity consume.

    • https://www.bijlibachao.com Abhishek Jain

      Regular tubular batteries, in general, have a longer life as compared to maintenance free batteries. If you maintain the batteries well, a tubular battery will last much longer.

  • Feroz Ahmad chillo

    Hi, Wanted to know what will be appropriate inverter & battery to buy for 10-5w led, 24 ” led tv, a set top box, ocassional phone chargers, a router(not wifi) plus a laptop, and propably, very rarely, 2 fans for atleast 6-8 hrs. I am planning to buy a single battery inverter but am doubtful considering an increase in load sometime in future. Kindly, reply ASAP

  • banerjee

    Excellent article . QUESTION :# 2 No’s of T5 tube, #3 fans, #1 Desktop with LCD Monitor, #1 wifi router, #2 phone chargers , #1 Laptop, #1 CFL, #1 LED tv 32 inch ( all will NOT run simultaneously.. ) what inverter and battery ( tubular ) should i buy..( company names preffered ) ? back up time expected to be around 4 hours. .. looking forward towards your help.. regards.

    • https://www.bijlibachao.com Abhishek Jain

      Tubelights = 2 x 28 = 56 Watts
      Fans = 3 x 90 = 270 Watts
      Desktop = 150 Watts
      Laptop = 60 Watts
      LED TV = 50 Watts
      CFL = 23 Watts
      Router + Chargers = 5 Watts

      Total would be about 650 watts. So VA value needed – 650 /0.7 = about 900-950 VA
      Assuming 70% of things run at any time, energy consumption = 650 x 0.7 x 4 = 1820 Wh or 1.8 kWh

      I think a 900 VA inverter with 200 Ah battery should be good enough for your needs. Sukam, Luminous, Microtek are leading brands of inverters while Amaron, Exide are leading battery brands.

    • Sameer

      If my need is a 700VA inverter then will there be a problem if i buy 1100VA because I am getting a good deal ? The battery is 100ah 12v battery. Does one keep battery size mind while buying inverters ? Also can a 14v inverter charge a 12v battery ?

    • https://www.bijlibachao.com Abhishek Jain

      Inverters also consume electricity as they have losses. You can buy an oversized inverter but oversizing means more electricity consumption (on top of what your appliances will use). Also there are no 14V inverter as inverters typically have voltages in multiples of 12 (12,24,36,48) as each increase of 12 means that you can add additional battery on to it.

      Battery size is important because your backup hours depends on that. A 100 Ah battery can store 1 unit of electricity, a 150 Ah battery can store 1.5 units of electricity. So your backup (in number of hours) increases by 1.5 times (so if appliances can run for 2 hours on 100 Ah, they can run for 3 hours on 150 Ah).

      The VA value determines how many appliances you can connect (depending on their power requirement. A 700 VA may connect 7 numbers of 100 Watt bulbs, and a 1100 VA may connect 11 such bulbs.

      So both VA value and battery size is important.

    • BANERJEE

      THANK YOU THANK YOU…. IT WAS PLEASURE AND REALLY HELPFUL.. RESPECT.

  • Sarath Kumar M

    I have brought microtek ss1660 model inverter 1660VA/24 i want to know Can i use SMF VRLA 12v 7ah ups battery ? Because my requirements is very low i want only use for 12v dc products like wifi router device only with atleast 4 hours backup if I use two 12v 7Ah batteries so May i know is this inverter support 12v 7ah ups batteries ?

    • Lathesh

      If your load is 12V DC, why don’t you power those devices directly from the battery. Why need for inverter?

    • https://www.bijlibachao.com Abhishek Jain

      I doubt that it will work well. A 1660VA inverter is a huge inverter for your requirement. The losses in it would be lot. And you have 2x12x7= 168 VAh energy …. and you will be running appliances at 230 V. It will be able to draw very less current. Your wifi router may work, but not for long.

  • Naughty Boy

    Hi

    How much time will take to charge 2*100Ah battery ..

    i’m planning to buy 1.4KV/24V inveter.

    • https://www.bijlibachao.com Abhishek Jain

      Typically charging current would be about 15 Amp. So 100 Ah battery will charge in 100/15 = 6.7 hrs.

  • VIRALKUMAR D JADHAV

    Superb explanation. Even a layman can understand and helps him identify his need. Reading this article also ensure that you are not chested by sellers. I literally felt like I have became electrical engineering. Though I am commerce guy. Thanks a lot.

  • Guest

    I am looking for an inverter and battery which can bear a load of – 4 Fans, 2 Tubelight, 2 CFL, Set top box, Wi-Fi, Modem, 2 Phone chargers – for a total of 8 hours. Please advice regarding the specifications of the battery and inverter that would suffice my requirement.

    • https://www.bijlibachao.com Abhishek Jain

      4 fans would be 360 Watts
      2 Tubelights would be 100 Watts
      2 CFLs would be 50 watts
      Set Top Box would be 15 watts.
      Wifi and Modem would be 5 watts

      Total would be about 540-550 Watts. Assuming 70% of the total would be used at any given time, that makes 380-390 watts used at any given time. So in 8 hours you need 390 x 8 = 3120 Wh or 3.12 kWh or 3.12 units of electricity.

      VA value you need is about 750 VA.

      But then the biggest battery that is available is 200 Ah which can store 2 units of electricity. So you need two 150 Ah batteries that can store 3 units of electricity. Two 150 Ah means 24 V system needed. The smallest 24V system that you can get is 1400 VA system.

      So you need 1400 VA/24V inverter with two numbers of 150 Ah batteries to support your requirement for 8 hours backup.

  • Probuddha

    Are there any kind of batteries that won’t require topping up with distilled water?

    • https://www.bijlibachao.com Abhishek Jain

      There are maintenance free batteries. But then their life is not as good as those that require distilled water. But yes if you do not fill distilled water regularly, the life of tubular batteries will also not be much.

  • amit

    it is very helpful & keep it up.

  • Ganesh

    Can I use maruti wagon r car battery for home inverter….regard.lokhande.9823612955

    • https://www.bijlibachao.com Abhishek Jain

      Inverter batteries are different. It is better not to use car battery.

  • Ram

    I am planning to install backup for 2 BHK, with 20W LED, 5 Nos and 4 Nos of fan, and one power socket for mobile charging only. Kindly suggest what capacity / type of battery and inverter to be installed. Please also suggest which brand shall be more better and reliable too.

    Regards, Ram Prakash, 9004656717

    • https://www.bijlibachao.com Abhishek Jain

      Your total load is about 500 Watts. Which means the VA capacity you need is about 750 VA. If you go for a 200 Ah battery along with that, it will give you a backup of 3-4 hours. Su-kam, Luminous, Microtek are leading inverter brands and Exide, Amaron, etc are leading battery brands.

  • Er Papun

    sir my problem is I have recently installed new sukam falcon+ 900va inverter for my home but after installing the inverter my APC UPS BR1000G-IN is not charging properly,if I remove the installed inverter then the apc ups charging properly and working without any problem to my desktop ??
    can u guide me why this is happening

  • Kiran

    Can I run my .75 ton LG ac on inverter for about 10 hours(max)? Please suggest the right inverter battery for this..I need to run only the ac…nothing else. The ac is 2 years old.

    • https://www.bijlibachao.com Abhishek Jain

      10 hours is quite long. A lot also depends on the electricity consumption of the AC and its energy efficiency. Assuming it consumes 0.7 units per hour, in 10 hours it would need 7 units of electricity. Let’s be a bit more optimistic and assume it to be 6 units. Then you need 3 batteries of 200 Ah. You can get a 2.5 KVA/36V inverter that can run a 0.75 ton AC for about 8-10 hrs. Su-kam has Fusion i series, Luminous has HKVA series and Microtek has SOHO 2.5 kVA/36 V sine wave inverter.

  • Guest

    I need an inverter as backup for 4 Fans, 2 Tubelights, 2 CFL, a set-top box, Wifi, modem, 2 phone chargers. The total watts ~ 538 Watts.
    According to your calculations, 538/0.7~769VA
    Assuming I need backup for 8 hours, 769 * 8hours =6152VAh
    For 12V battery, 6152/12V=512Ah

    In most of your comments/replies you have mentioned that the biggest battery available is of 200Ah. So that means I need 3 200Ah batteries connected to a 36V inverter.

    I have a few questions regarding this:
    1. Which is the best 36V inverter available in the market?(Brand and Model name)
    2. Do I really need to connect 3 200Ah batteries(It would consume a lot of space)? Isn’t there an alternative? Would my electricity bill increase considerably if I have 3 200Ah batteries?
    3. 36V inverter would mean high VA value, since I need only 769VA, would I be at a loss to invest on a 36V inverter?

    Please advice.

    • https://www.bijlibachao.com Abhishek Jain

      Your calculations are correct. Also I would like to mention that Inverters are good enough for 3-4 hours backup. For 8 hours backup for a bigger load, it is better to go for a DG set. Now to answer your questions:

      1) Typically 36V starts with 2.5 kVA inverter. Su-kam has Fusion i series, Luminous has HKVA series and Microtek has SOHO 2.5 kVA/36 V sine wave inverter.

      2) If you need 8 hours backup then you will have to go for 3 batteries (all of same AH capacity). You may also go for 3 numbers of 180Ah batteries.

      3) As for your electricity consumption: currently without inverter your appliances are not being used, so there is no electricity consumption during power cuts. But then if you use your appliances during power cuts, the power consumption will be there. Inverter does not generate electricity, but it stores electricity from your electricity supply. So whatever appliances that you use, the power consumption for that will start showing up on your bills. On top of that, the inverter are not 100% efficient. They may be about 80% efficient. So extra 20% is lost due to the usage of inverter. So if your appliances during those 8 hours would have consumed 10 units of electricity, then with inverter your power consumption becomes 12 units.

      3) Inverters when run at lower loads will have lower efficiency. So if you run 769 VA on 2.5 kVA inverter then it will certainly run at lower efficiency.

  • ms khan

    sir,
    please suggest me inverter my load is-
    2 fan, 3 cfl 50w, fridge 200ltr 150w, computer.
    better is fixed amaron 150ah tubelor.

  • narender

    hi sir,

    i would like to confirm my load & electric unit consumption. details are as below
    1 inverter of 700 va microtek
    battery 150 ah okaya

    load on inverter= 1 fan .2-tubelights 40 w+1 cfl

    without inverter load 1 fan + 2 let bulb of 5*2=10 w

    please suggest how much is load is this my electric meter showing 1.280 kwh load on screen.

    thanks
    Narender
    7206062100

    • https://www.bijlibachao.com Abhishek Jain

      do you mean 1.28 kW or 1.28 kWh? Because both are different. One is rate of electricity consumption and other is actual electricity consumption. kW is just like speed just like km/hr and kWh is actual energy consumption just like actual distance in km.

      if you have a 150 Ah battery then it will store 1.5 kWh of electricity and on top of it there would be losses (due to inefficiency), so in all it should consume more than 1.5 kWh (roughly around 1.8 kWh). So 1.28 kWh does not make sense in that.

      If you are talking about rate of 1.28 kW or 1280 Watts. Then 1 Fan would be about 90 Watts, 2 Tubelights would be about 90 Watts and 1 CFL would be about 23 Watts. Which totals to about 200 Watts, there again 1.28 kW does not make sense because an inverter would not consume 1000 Watts. Typical no load wattage of inverter is in the range of 10-20 Watts.

  • Devashish

    After calculation , I opt to choose 1000VA(including power factor) inverter to power my house.
    Please help me to chose battery/batteries for a backup of 7-8 hours.
    And will it be ok to choose 2nos 150Ah or 2nos of 200Ah or a single 200Ah.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Devashish,

      1000 VA for 8 hours would be 8000 VAh. A battery is of 12V, so the Ah value required is 8000/12 = 666.67 Ah ….. Three 200 Ah batteries will make 600 Ah ….. so none of your scenarios would work ….. also for 3 batteries you need 12×3 = 36V inverter.

  • Vikas

    Thanks Bijli Bachao Team for the article.

    Not sure where/who to ask, as this is regarding Inverter, posting it here.

    Can I install 2 inverters in my home?
    Situation:
    I have one inverter (with battery) already installed, which becomes insufficient at times.
    So, I have two options –
    buy a new one considering all the load & for longer backup.
    or
    buy another inverter, connect existing one with one set of rooms & new one with another. Is it possible ?

    • https://www.bijlibachao.com Abhishek Jain

      You can certainly install 2 inverters for your home. Your electrician can help you in setting it up. He can split the load on to two different inverters.

  • toufique

    Hello Abhishek,

    Your website is really good and very helpfull.
    I need your help in determining the size and capacity of interver + battery to power 1 HP Single phase water pump.
    It will run daily for 1 and half hour.
    Please suggest me the suitable configuration . Thanks.

  • Priyanka CG

    Hi Sir
    Thanks for the valuable information.

    I have the following appliances
    4 X Tube lights
    3 X LED lights
    1 X Refrigerator Samsung 175 lt
    1 X 32 ” LCD TV
    1 X Room cooler
    2 X Ceiling Fans
    I require back up for 6 hrs

    Please suggest me the best invertor & Battery configuration

    • https://www.bijlibachao.com Abhishek Jain

      Hi priyanka,

      Just because you have a refrigerator which will have high startup current, you need a 2.5 kVA inverter. Try going for one with 24V and then add two 200 Ah batteries to it.

  • Saaya

    Hello Abhishek Sir,
    I am planning to buy an Inverter and battery .your Article is very helpful but still i am confused .I want to use the following appliances for a 6 hrs backup :-
    4 Fans
    4 tubelights
    1 Tv
    1Cfl
    Sir,Plssss suggest me a long life & good inverter +battery with brand name.
    Thanking you

    • https://www.bijlibachao.com Abhishek Jain

      Total watts that you want to support is: 4×90 + 4×50 + 100 (assuming CRT) + 23 = 683 watts.

      VA rating required = 683 / 0.8 = 853.75 VA

      Battery required – 853.75 x 6 = 5122 VAh

      Ah value required – 5122/12 = 426.87 Ah

      The biggest 12 V battery available would be 200 Ah. So you need two or more batteries.

      If you need two batteries then you need 12 + 12 = 24 V system.

      Also please note that typical inverter has a charging current of 12-13 Amp. So 200 Ah will charge in 200/12 = 16 hours at least.

      The smallest inverter that can support two batteries would be about 1400 VA inverter. So you need to go for a 1400 VA inverter of 24 V. And yes you need two 200 Ah batteries with that.

  • San

    Dear Abhishek,

    What if main supply is back while an inverter is in use, I mean inverter supply input & output are from a single power (Plug) cord right, so how it will turns off inverter supply to source while main supply is back.
    where I can get a wiring diagram of inverter supply to source (Fans & lights)

    • https://www.bijlibachao.com Abhishek Jain

      Online Inverters sense the grid power and switch on and off the inverter automatically. Most modern inverters have this feature. You need not switch it on or off.

  • Srikar

    What happens when one exceeds load of Inverter when there is Grid power available? Will it by pass to Grid power or will it shut down? I want to purchase a lower capacity inverter but will that restrict my usage even during times when there is no power cut?

    • https://www.bijlibachao.com Abhishek Jain

      Even when the power is available from the grid, you should not exceed the load on inverter. Work with your electrician and he will be able to split the load in your house in two parts 1) on Inverter 2) not on inverter. And make sure that the one on inverter is within the range that the inverter can handle.

      If you buy a low capacity inverter, then you divide the line in your house in such a way that only the load that can be handled by the inverter is on the inverter.

    • Er Papun

      sir which brand is best for buying inverter apc or luminous?????

  • kalim shekh

    DEAR SIR
    I want faster charging inverter with battery backup 6 hours. load 3 fans, 6 cfl, 1 led tv. please recommend me.

    • https://www.bijlibachao.com Abhishek Jain

      As per the calculations, the VA value you need is about 600 VA and Ah (battery backup) you need is 300 Ah. Even if you economize (or assume only 80% appliances are on at any given time), it comes to about 470 VA and 235 Ah. The biggest battery that is available for inverter is 200 Ah. So if you really want 6 hours backup, you will have to go for two 150 Ah batteries. Now two batteries will make is 12V+12V=24V system. So in that case the smallest 24V system would be a 1400 VA system. So if you really want 6 hours backup, go for a 1400 VA 24V system with two 150 Ah batteries.

  • r pawar

    I want invertor for one fan and one cfl bulb for 6 hr backup ,please suggest the invertor and price

    • https://www.bijlibachao.com Abhishek Jain

      One Fan and One CFL would hardly be 100 Watts. It is quite a small requirement. Theoretically, a 150 VA inverter and 80 Ah battery should be more than enough for your needs, but then minimum the inverters start from is 400 VA. I think yours is a great case for implementing a small Solar DC power system with DC fan and CFL bulb. You can check out something like this: http://sukam-solar.com/sukam-solar-dc-system/

    • Rajesh Calicut

      An inverter is a luxury in such cases. There are DC emergency fans and LED bulbs (with battery) available in market which can last for longer hours with cheaper cost. They would be more cost effective, cheaper, and energy efficient too. Inverter if you run at such low wattage would drain lots of battery on a run of 6hrs.

  • hasan kamal

    dear abhishek
    i am planning to buy microtek inverter 1100va with Exide battery 200ah
    i need to backup time 8 hours.
    4. ceiling fans
    4. cfl
    1. led tv
    1.freeze
    & mobile changing.
    sir please recommend.

    • https://www.bijlibachao.com Abhishek Jain

      Typically if you have a fridge you need 2-2.5 kVA inverter. This is because compressor of a fridge needs more electricity to start. Once it starts, the electricity need comes down. But many modern inverters can handle that momentary surge. Check with your inverter dealer if the model that you have selected can handle the surge or not.

      By the way one 200 Ah battery can not give you 8 hours backup. At max it can give 3-4 hours backup. You need two 200 Ah batteries for up to 8 hours backup. For which you will have to go for a 24V inverter.

    • hasan kamal

      sir, if i use (4, ceiling fans) (6, cfl) (1, led tv) with 1100va inverter battery 200ah enough to backup 6 hours.

    • https://www.bijlibachao.com Abhishek Jain

      1100 VA will be quite big for that because total wattage would be around 500 watts. Which means 650-700 VA should be good enough. Assuming you will use 400 watts (out of 500) at any given time, 200 Ah battery should last for 5 hours.

  • Srikanth

    Very nice & informative..

    I want to know that is there any benefits to use larger capacity inverter than required with lower capacity battery???

    Thank you…

    • https://www.bijlibachao.com Abhishek Jain

      Larger capacity in inverter can help you run more appliances. Larger capacity battery can give you more hours of backup. The two are quite unrelated. When manufacturers specify ideal battery size, the backup assumed is 4 hours for ideal appliance load.

      But then you can always increase or decrease battery capacity to increase or decrease backup time. You just have to make sure that the total voltage supplied by the batteries is equal to that needed by the inverter.

    • Srikanth

      Thanks lot for such a valuable reply,

      I plan to buy 2 kva inverter which says two battery / 24v then can I use with single 12v 180Ah battery or should be 2 batteries 12-12=24v I mean is there any switch to make 12v & 24v
      Current load is approx 600w.

      Thank you again..

    • https://www.bijlibachao.com Abhishek Jain

      Hi Shrikanth,

      Firstly 2 kVA is a huge system for 600 W load unless you have an appliance that has a motor. Secondly if your inverter is 24 V, then you cannot make it work with single battery. You need two batteries. If you want 180Ah backup, then you may go for Two 80 Ah or Two 100 Ah batteries. But you will have to go for 2 batteries.

    • Srikanth

      Thank you for sharing your wisdom with us.

  • Santhosh

    Thank you for providing such valuable insights.
    my requirements for my 1 bedroom house with single phase are:
    2 fans
    2 tubelights and
    1 LED TV(40 inches) with HD set top box.
    my own calculation for 6 hours of back up came to 289 Ah and 3468 VAh.

    but only 200 Ah max is available in the market.
    can you please suggest a good inverter+ battery?

    • https://www.bijlibachao.com Abhishek Jain

      You will have to go for two numbers of 150 Ah batteries for your use. And for that you will need a 24V inverter (because there will be two batteries of 12V). The smallest 24V inverter would be about 1400 VA inverter. Would suggest you to look at 1400 VA/24V models from Sukam, Luminous, Microtek.

    • dr.neeraj

      Plz send u whats app num

  • Ujjawal Kumar

    Hii All.
    First of all I would gladly thank all experts here at bijlibachao for such a commendable work on important facts.

    Now my current scenario:
    I have a 1yr old 1600va inverter (Sukam Falcon) and what I am noticing is that whenever the compressor of the refrigerator starts the inverter gives a beep for 1-2seconds(may b bcoz of starting surge) and then everything is fine. After the compressor is started/steady there is no beep. However When I turn on air cooler the inverter overloads, if compressor of refrigerator is running, otherwise everything is fine and it doesnt even beep.

    From my understanding, this above behavior is based on the nature of Toshiba refrigerator’s compressor. But my question is: what the inverter manufacturers say about inverters is that most inverters are designed to handle overload for a few amount of seconds (10-15) before tripping so a 1600va inverter can handle 2KW of load for 10seconds before tripping and 1200watt of continuous load without any problem. I am not able to understand how much load is my refrigerator drawing so that the inverter is not even able to last 10seconds before tripping?
    The Toshiba refrigerator is about 7yr old, frost free, sizing 270l and is non-iverter tech.

    I am planning for solar expansion within a two month period i.e. to increase current 500watt solar power to 1500watt and also replace the inverter by Luminous SineCruze 2KVA.

    So, By using 2KVA (copper based) inverter will I be able to do the following or should i go for 2.5KVA (36v)?

    1. Run an air cooler+non inveter tech Fridge+3fans(70w each)+2LED TVs(both 100w each)+5LED bulbs (12w each)+ 2or 3 mobiles chargers

    2. Adjust the load by turning of Fridge,cooler etc and Run a 1Ton 5 star AC(non inverter) alone in daytime as the inverter will get charged by Solar power(1500watts).

    2. Switch everything off in Night and Run a non-invertertech 5star 1 Ton AC (O.General EER 3.53) alone. I am happy if the inverter beeps for 2-3 seconds but does not trip. My typical plan would be to run the AC for about 30min so the room cools then switch it off so the battery lasts whole night (in case if Mains go down).

    Also I’ve a few more questions ?

    1. How much surge does Inverter Tech ACs and Fridges require e.g. a 1ton invertech AC costing about 40k, how much starting current will it need? is it exactly same as normal running current? can a 1 ton invertech AC along with 2 fans and 1 LED TV be run by a 2KVA inverter ?
    2. Does the star ratings or EER rating of ACs effect there inrush starting surge ? for e.g Does a 5 star non-inveter AC require lesser starting surge then a 1star or 3star non inveter tech AC ?
    3. Does the Summersible water pump (Rated as of 1HP = 746watts) also require more load to start the motor?
    4. Generally the ACs (non-inverter Tech) use 15A plugs and internel wiring of the sockets is 4mm for them but the inverter’s phase wire is of 2.5mm in houseline so can a 2.5mm wire be used to run a 1 ton non inverter tech AC ? or will it require a changing/work around like having a seperate direct supply line right from inverter to AC?
    5. I heard somewhere that The inverters using copper based transformers have higher power factor and can handle more peak load (overloading bandwidth) before tripping – is this statement true ?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ujjwal,

      Firstly I would say if you want really accurate data, you should try measuring your appliances by using an energy meter. You can check this (and similar ones) on Amazon: http://amzn.to/29m78jN …. This model can handle upto 15 Amp or can easily help you measure a 1.5 ton AC. You can get VA value for load, max current, etc. This can help you exactly size your solar PV system.

      Now to answer your questions:

      1) Typically we suggest a 2.5 kVA inverter for a refrigerator. Smaller ones may be able to handle it (as newer ones can handle surges) but 2.5 kVA can safely handle it.

      2) Your 1st scenario can be handled with 2.5 kVA inverter.

      3) You will have to check if 2.5 kVA inverter suits your 1 ton AC. Typically for 1 ton AC we suggest 3.5 kVA to be safe. Also if you use AC on inverter, you would need lot of storage (i.e. battery) as total energy consumption of ACs is quite high (A 1 ton old AC may consume about 1 unit in an hour …. your 1.5 kWp solar PV would only produce max 6-7 units in a day)

      4) Inverter Tech ACs and Fridges do not have any startup surge. They steadily start at low current and gradually increase to peak current. So for e.g. if you have a 1 ton non inverter AC, it may start at 14-15 Amp and settle at 5-6 Amp. But an 1 ton inverter AC would start at 1 Amp and gradually increase to 6 Amp (just an example), and then may be get steady at 3-4 Amp. It will not go beyond its peak rated power. Even if it does it would not be more than 10-20%, while a non inverter AC can start at 2-3 times its steady state current. You can certainly run a 1 ton inverter AC on 2kVA inverter (along with fans and LED TV).

      5) Star rating does have an effect on starting surge. Power consumption is lower for 5 star rated AC and thus its peak requirement is less. And so the starting current is also less.

      6) Any motor will require more load to start. So even a 1 HP pump will need 2-3 times more current to start. To give you an analogy, if you are on a bicycle, when you start cycling, you have to put more efforts to start. But once you start moving, efforts to keep it running goes down. Similarly, any motor (non VFD) needs more effort to start running. And that is where VFD or Variable Frequency Drive or Inverter Technology saves the effort.

      7) Smaller wiring can lead to voltage drops, however 2.5 mm wire can handle up to 10 Amp current. 4 mm can handle upto 16 Amp current. Ideally steady state current of 1 ton non inverter AC shoudl not exceed 10 Amp. But if it gets more than 10 Amp, you will observe voltage drops. But I think 2.5 mm wire should be able to handle 1 ton non inverter AC.

      8) Copper windings are always better. It can certainly give you better power factor.

    • Ujjawal Kumar

      Thanks a lot for answering:)
      I’ve few more questions:

      1. Pls tell me does heating elements like Geyser or Ironbox or Induction Heating coil for cooking also have similar nature of requiring High initial Current at start ?

      2. Can I run a 2KW Geyser on a 3.5KVA inverter along with few led bulbs & no fans (as in winter fans are off)

      3. If i replace my existing 24v inverter by a 48v one then can I use the existing batteries with newones ? The current batteries are 150AH Sukam Bazooka exactly 1yr old and well maintained.

      4. For a 48v inverter can I employ 2 batteries of 150ah & 2 batteries of 200ah to attain 700ah backup in total ? Or the AH of all da 4 batteries be same?

      5. Also the brand of all the batteries should be same? One of Sukam & one of Exide ? Not good?

    • https://www.bijlibachao.com Abhishek Jain

      Here is my response:

      1) High surge is only needed for motors and not for inductive load. So your geyser, iron box and induction heating coil will not have high initial current. They may have high steady state current just because they are high wattage appliances, but then do not need more to startup.

      2) You can certainly run 2 kW geyser on 3.5 kVA inverter. In ideal state 2 kW geyser should be equivalent to 2 kVA … worst case it would be about 2.2 kVA.

      3) Better to not mix old and fresh batteries. Output of batteries go down with time and if you mix then the overall output will be determined by the output of old batteries. So effectively you will be able to extract less from new batteries.

      4) A 150 Ah battery has lower output as compared to 200 Ah, and thus mixing the two will result in output of about 150 Ah from 200 Ah battery. I am sure you would not want to waste the extra resource that you have paid for. Ideally all batteries should be of similar age and similar Ah value.

      5) Although not very important, but it is better to have same brand.

    • moa

      Sir abhishek
      I want to know the minimum price and ah value for an inverter to use
      2 desktop LCD
      1 fan
      1 cfl
      For 2 to 3 hrs per day

    • https://www.bijlibachao.com Abhishek Jain

      Cannot comment on the price. But if you are looking at sizing, then here are the numbers:

      2 Desktops, each of 150 Watts totals to 300 Watts
      1 LCD TV: assuming 100 Watts.
      1 Fan: 90 Watts
      1 CFL: 23 Watts

      total is 513 watts. So the VA value is 513/0.7 = (approx) 750 VA.

      750 VA for 3 hours = 750×3 = 2250 VAh.

      Each battery would be 12V, so Ah value = 2250/12 = 187.5

      So you can go for a 750 VA inverter with 180 Ah battery.

    • Ujjawal Kumar

      By output of batteries do u mean overall backup ?

    • https://www.bijlibachao.com Abhishek Jain

      That is right. For e.g. if a new battery may run for 4 hours after full charge, an old one may run for just 3 hours after full charge. If you mix a new and an old, you will get only 3 hours backup because the old one will die down in 3 hours and because it is part of the circuit, the energy stored in new one will not be used at all after 3 hours.

    • Ujjawal Kumar

      Thanx a lot for ur time.

      My One last question: My 1 ton AC (noniverter) is connected to a 4Kva stabilizer. Can I connect this to a 3.5Kva inverter using stabilizer? I mean 4Kva stablizer getting connected to 3.5Kva inverter will not create any overloading or mismatch ? I really don’t want to burst the transformer of either of the appliance.

    • https://www.bijlibachao.com Abhishek Jain

      All depends on how much current the AC draws at peak load. 3.5 kVA means at 220 V, max current that your inverter can supply is 3500/220 = 15.9. If at any time your system (which includes your AC) draws more current, the inverter will not work. Depending on power consumption of your AC, it may or may not draw that much current. You will have to test it out. In general 4 kVA inverter would be safer to use with 1 ton AC. Also because power consumptions of ACs are higher, it is generally recommended to use AC with Diesel Gensets rather than Inverter. Max that I have seen is inverters supporting 0.75 ton AC.

    • Ujjawal Kumar

      No no actually 1 ton AC does work on 3.5KVa inverter easily but the point is that can a 4 KVa stabilizer be connected to the inverter or should the AC be directly connected without any stabilizer in between AC and inverter? Does use of stabilizer effect the current being drawn from the power source?

    • https://www.bijlibachao.com Abhishek Jain

      I do not think there should be any problem in putting a 4 kVA stabilizer in between a 1 ton AC and 3.5 kVA inverter. The current will be determined by the AC and not by the stabilizer. 4 kVA is just the limit to which it can handle. But the actual current will depend on the AC. There may be small amount needed for the stabilizer, but it will be too small in front of the current drawn by the AC. So I would say, it should work fine.

    • Fawaz

      Very Nice set of questions but I dont have the answers :P
      you really need an expert like Abhishekh Jain.

  • RAHUL GUPTA

    Very knowledgeable information for us. Thank you so much.

  • aman

    I have to by inverter battery system which one will be best the load is
    2 fans 1 led tv 3 cfl 3led lights and laptop charger point and cooler so which one i should go for! Budget is near 15k to 25k

    • dr.neeraj

      You mobile num

    • Jamal Moram

      9848283850

  • Mirana

    Can I use a tall tubular battery along with my sonic PBX 1500 which I think is semi-tubular(?) for my 1.5kva inverter? Both my batteries were pbx 1500 but now one is dead and I want to replace it with a full tubular battery. Do I have to replace both?

    Also great site, thank you.

    • https://www.bijlibachao.com Abhishek Jain

      Would not recommend to mix old and new batteries. Output of a battery goes down with time and if you mix two then the one that has lower output will drive the actual output.

  • dev

    Which battery is best between exide inva master IM10000 36 month warranty and amron tall tubular 48 month warranty.

    Also tell about market price of both.

    Thanx

  • om samantaray

    my basic requirement is 5 no of 12w led bulb with 3 fans and 1 32″ lcd with standard set top box. Also 3 5a charging points.
    n I have brought zelios 1100va, with ILTT 26048 220AH battery. Is the combination okay ?? Regarding battery i have a doubt is of charging time. How much time will it take to charge fully. And also the discharge rate of it . Kindly reply me with ur wisdom.

    • https://www.bijlibachao.com Abhishek Jain

      Typical charging current is about 13 Amp. So if you have a 220 Ah battery it will charge completely in 220/13 = 17 (about 17 hours).

      A lot depends on what you put on those 5 Amp charging points. Will they be used just for phone/laptop or will you put a heavy appliance on it?

      You have total of 1100VA ….. LEDs is 60 Watts, 3 fans would be 270 Watts, LED TV would be another 60-70 watts. So in total you have 400 Watts which means even a 500-600 VA system would be more than enough. So you have about 500-600 VA extra that you can support. If it is just mobile phone chargers and Laptop Chargers on the charging points, then it would be easy. But if you put anything big (with a motor in it), then it would be difficult to run that. 220 Ah battery can give you 5-6 hrs backup, but then it would take 17 hrs to charge.

  • Ashraf

    Hello, ur blog helped me a lot to understand about the inverter and battery system buying guide.
    I’m thinking of buying a 150Ah battery and a 800/900 W inverter. So, can u recommend a good brand for the combo/individual system, I’m kind of confused to go for which brand in inverter and battery and I’m from kerala.

    Thank u

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ashraf,

      Sukam, Luminous, Microtek are great brands for inverters. Amaron, Exide are great brands for batteries. However all these 5 brands sell both inverters and batteries. They also sell their own inverter battery combo. If you buy combo then you can get better warranty and maintenance.

  • Sam

    Hello Abhishek,
    First of all thanks ever so much on very informative post. I learned something today :)
    I have gone thru the calculation like many others and come up with what I think is needed. 10*LED lights,1*Tv, 4*Fan,1*Set top box,1*Wifi router,1*Fridge = ~900watts –> ~1100VA
    So based on this I was thinking of Microtek SEBZ1100 or UPS – SWE²+ 1115VA
    But my main problem in deciding is
    1) Inverter companies market with plethora of acronyms as a marketing gimmick, so which are the real features which add value(or really matter) rather than just a feature for the sake of it.
    2) All combo inverters come with single battery so when I say I need 6 hrs back up then, from above example I need 1100*6/12= 550Ah—->which means I need 3 nos of 200Ah batteries. So how come they are saying that I can get 6hrs backup just by using a single battery in a combo pack.
    3) Thirdly and this may be because of lack of knowledge on electrical, but the specifications for inverter are very confusing. You mentioned about 24V battery but I dont know where in the spec book it refers to 24V. Its just tech jargon to confuse common buyer.

    So can you please help in distilling this in to few critical features we need to look for and how to interpret the tech spec for inverter. The sales guys from inverter company would just throw few acronyms and try to sell useless features to generate sale.

    Thanks.

  • Chanki Shaad

    What is procedures for new connection in my home… economicAl as well as safe
    For 2 ceiling fan 2 tube lights and 1 changer 1 router plug.

  • Rahul

    Hi abhi which combo is better…Sukam inverter+autobat batteries. Or. Microtek inverter+ Amaron batteries……or any other combinations suggested

    • https://www.bijlibachao.com Abhishek Jain

      Sukam is a better inverter company and Amaron is a better battery company :)

  • royston

    Hi abhishek,
    Quick question, I am new to this. I would like to know about the wiring. Can this be hooked up directly to the current wiring system or will there have to be a separate line laid out?
    Thanks
    Roy

    • https://www.bijlibachao.com Abhishek Jain

      Are you trying to put a new inverter system? If yes then it can be hooked to current wiring system.

    • royston

      Thanks. My basic requirement is 10 tube lights+ 06 fans+ 2 x 5A charging points + 1 fridge ( If possible).
      I have narrowed it down to a Luminous Cruze 2KVA + ILTT 18048 150Ah Tubular Battery ( 2 batteries)
      Would you suggest this set up. this is taken in consideration that my requirement might go up.
      Thanks

    • https://www.bijlibachao.com Abhishek Jain

      All depends on how long do you want the backup for. Just tubelights and fans would be total 1.1 kW. Assuming 70% are on at any time it would consume 0.7 units in an hour. Fridge would be another 0.1 unit in an hour. Assuming 1 unit consumption per hour, two batteries of 150 Ah would give 3 hours backup. 2 KVA should be fine for the setup.

  • Medy Karattong

    Hi Abishek,

    Thank you for sharing your knowledge, I want to apply it in my house.
    Following your mathematical theory, I found total power about 1800 watts, than i want backup for 5 hours, the result is need battery with 756 Ah.
    I want to purchase an inverter luminous 2500 VA / 36V and 3 battery 200mAh in series, or maybe you have another suggestions.

    Thanks in advance.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Medy,

      Your calculations are right. You can go ahead with 2500 VA/36V 3 battery 200 Ah system. Just keep in mind that the charging time will be about 10-12 hrs.

  • Ajit Jadhav

    Hi Abhishek,

    Thank you for sharing this valuable information for your website visitors.

    At my place we face frequent power cuts multipal times a day some time power wont be available for 6-7 hrs also.

    I want to use 2 LED lights of 20 watt = 40 watt
    1 Tube light 50 watt = 50 watt
    2 Fans = 180 watt

    I will need the power backup of at least 6 hours also please suggest a battery or an inverter that charge battery faster.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage is 270 Watts. Which means in 6-7 hrs you would need 1.6-1.8 units of electricity. Going for a 180 Ah battery would be safe. Also 450 VA inverter would be more than enough for your needs. But for faster charging, it is better to go with bigger inverter. So 800-850 VA with 180 Ah battery should be more than enough for you. Try to go for a single brand inverter battery combo. Sukam, Luminous and Microtek are leading inverter brands.

  • chandan das

    4 LED Lights(7 watt)- 28 watt
    2 Celling Fan(100 Watt)- 200 watt
    1 Led 36 inches TV( 100 watt)- 100 watt
    1 setup box Normal( 10 watt)- 10 watt
    Total 338 watt
    VA required 338/0.7=482 approx 500VA

    for 8hr back-up 500*8=4000
    for a 12V batt. 4000/12=334Ah i,e 180Ah X 2

    so i have to buy a 500VA / 2Nos-180Ah connected serially to inverter
    is that correct ???

    • https://www.bijlibachao.com Abhishek Jain

      For two batteries you need a 24V inverter to connect batteries in series. With 500 VA inverter you will have to connect them in parallel but then the time taken to charge completely will double up.

      Smallest 24V inverter would be a 1400 VA inverter. A single 180 Ah battery will charge in 180/12 = 15 hours.

    • chandan das

      Thank you Mr. Jain
      so i shall purchase 24V inverter of 1400 VA rating with two batteries of 180 Ah connected in series with the Inverter system

  • Abhishek Kumar

    Hi Abhishek,
    My requirements are for a 3 BHK, 5 tubelights, 3 fans,refrigerators and a TV. I am looking for 4-5 hrs backup. what shd be the ideal battery and ups

    thanks

  • ashvini

    Exide Launches SF Sonic Batteries and now those on direct sale. Exide do not sale batteries, customer has to buy from Shop or retailer or dealer. Now, Exide has Power Bay store and from here you can directly buy batteries from Exide SF.

    This is for those who do not know:
    SF Sonic is Exide Battery devision that launched for high performance batteries. You can find your self on Exide Official web site, there is link for SF sonic. Also for new launched Power Bay Store (for Direct sale of battery, you can click on Power Bay store of SFSonic official web site.

    Here is the link of Power Store to buy:
    http://www.exidesfsonic.com

  • balaji

    Hi,
    My home Inverter has few micro seconds delay. when power is turned off, inverter switching to battery has some delay. For eg: My TV turned off and turned on back after the power. Could you tell me what would be the reason? I am using Exide Inva Master 150Ah battery and V-Guard Ei Power 600 Plus.
    Thanks

    • https://www.bijlibachao.com Abhishek Jain

      Is it happening since the beginning (when you purchased the inverter) or has it started happening lately (due to a defect that may have come up)? Typically inverters have a switchover of microseconds, but then it varies from inverter to inverter. Vguard company should be able to find the real reason.

    • Balaji

      Thanks Abhishek. It has started happening lately. When I purchased the inverter, I did’t have this issue. Could you guess what would be the defect.

    • https://www.bijlibachao.com Abhishek Jain

      Not really. But it certainly looks like a defect that has started happening now. I think you should call up VGuard helpdesk for the same.

  • Thabraiz UL Aalam

    my need for a clinical lab is one desktop with crt,one desktop with lcd,40w tubelights(4nos) 12w led bulbs(2nos),analyser(140w) from above info ,just did a rough calculation.
    CRT SYSTEM-250
    LCD SYSTEM-150
    TUBELIGHTS-40*4-160
    LED BULBS-12*2-24
    ANALYSER-140
    TOTAL-724
    VA NEEDED-724/0.8=905VA
    FOR TWO HOUR BACKUP-905*2=1810
    FOR A 12V BATTERY
    1810/12=150.83Ah
    SO I CAN USE ANY 1100VA MODEL WITH 150Ah BATTERY. RT??
    PLEASE CHECK THE CALCULATION AND CORRECT ME IF AM WRONG…
    ALSO MENTION SOME GOOD MODELS WITH THIS COMBO..THANKS…

    • https://www.bijlibachao.com Abhishek Jain

      Your calculation is correct. 1100VA model with 150 Ah battery should work fine. You can look at models from Sukam, Luminous or Microtek. These are good brands in Inverters.

  • http://www.sherlockholmes-fan.com/ Meghashyam Chirravoori

    Hello. Thanks so much for the amazing information about inverters and batteries. It has helped me a lot.

    I have a question. I am planning to buy a Sukam Shiny home
    inverter and an Exide Powersafe SMF battery. Is that fine?

    Some inverter dealers have told me that Exide Powersafe should not be used
    with home inverters and it will lose its warranty.

    Which SMF battery would you recommend with a home inverter?

    I’d be really
    grateful for any advice in this regard.

    Thanks!

    – Meghashyam

    • https://www.bijlibachao.com Abhishek Jain

      HI Meghashyam,

      In general SMF batteries are not recommended for use with inverters. These days inverter + battery combo from the same brand is a much better option as brands provide good warranties (3 years + ) on combos. Also as part of warranty, they send technicians to do regular maintenance of the system (battery + inverter). So you need not worry about the maintenance of the battery. And well maintained tubular batteries last long. I would suggest that you go for a inverter battery combo from Sukam.

  • Abhinandan Choudhary
  • Ayaan

    Hi Abhishek,
    Could you please suggest the inverter and the number of batteries that I should opt for the following:
    Tube Lights – 6
    Ceiling Fans – 4
    LED 43″ TV – 1
    Set top Box – 1
    Laptop – 1
    Router – 1
    Backup Required for 6 hours.
    Thanks,
    Ayaan

  • srikanth chary

    hello Abhishek sir,
    afterall a survey in the market i am just confused which inverter and the number of batteries to buy can u help me out in choosing a right inverter, batteries with their ratings as per my requirements

    i want to run 4- tube lights, 4-fans, 1-led tv of 32inches with HD box, and one refrigerator of 510liters and it is an inverter model
    i want to run all these appliances for 3-4 hrs.

    • https://www.bijlibachao.com Abhishek Jain

      Total load would be about 1 kW, but then electricity consumption may reach to about 3 units in 4 hours. So a 1400 VA/24V inverter with two 150 Ah batteries should work.

  • Ankur Jain

    Hi Abhishek,

    I want to install an inverter to achieve the following –

    Total Hrs. of backup – 8 Hrs.

    1. 4 Fans
    2. 4 LEDs Lights 7watt
    3. Refrigerator (180 Watt)
    4. LED TV
    5. 2 Mobile Charging Points

    Please suggests which one i should buy. My location is Pune. I am looking to buy today/tomorrow

    Thanks,
    Ankur Jain

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ankur,

      You should go for a 1400 VA/24 V inverter as you would need two batteries at least to support 8 hours. You would need two 180 Ah batteries. These batteries will get charged in about 14-15 hrs.

  • naqshpa

    i want o run gyeser + lights on an inverter. is it possible or would i need to use a generator. Also can a generator be used in flats?

    • https://www.bijlibachao.com Abhishek Jain

      You can certainly run geyser + lights on inverter. But then a huge inverter will be required for a geyser. And typically large inverters can work only on big array of batteries. And you may not need that much batteries as I guess your usage of geyser will not be for hours and hours.

  • saurav

    Hi Abhisekh,

    This article is really informative. I have 2 questions to you please..

    1) I have a luminous modified sine wave inverter and I have recently baught a 50 inch LED of micromax. Now I am worried about the TV. My area is a heavy power cut area. So I use this TV frequently with that inverter during loadsheding. Do you suggest me to change the inverter to a sine wave inverter or just I can keep it like this, as the TV has 3 years warranty.

    2) My voltage goes as low as 120 V for these peak 3 months. If I put a 1 kva stabilizer in front of my 875 VA inverter, then can I get stabilized output in the lines where the inverter is connected. There is no problem of voltage when inverter is on.

    Regards,

    Saurav

    • https://www.bijlibachao.com Abhishek Jain

      Here is my response:

      1) Modified SINE wave inverters are not good in general for electronics. It will be better if you go for a SINE wave inverter.

      2) You can certainly put a stabilizer in front of an inverter.

  • abhishek khanna

    Hi Abhishek Jain,

    I am planning to purchase SU -KAM 3.6 KVA Fusion invertor with 4 SF Sonic Stan Master 10000. In my area, power cut is even more than 24 hours sometime. I want to run laptop for 8 hours with one cooler 200watt Kuntocom Supreme DX, 1 fan and 1 LED 10watt for upto 30 hours. Please suggest if this will support.

    • https://www.bijlibachao.com Abhishek Jain

      A laptop is 50 watts and that along with a 200 watt cooler would make 250 watts. In 8 hours it would consume 250×8=2000 Wh or 2 kWh or 2 units of electricity.

      A fan would be at max 90 watts. That with 10 watts LED would make 100 Watts. In 30 hours, it would consume 30×100=3000 Wh or 3 units of electricity.

      So in all you need to store 5 units of electricity. You are going for 4 numbers of 150 Ah batteries, which would store at max 1.5×4=6 units of electricity. Which should be good enough.

      For 4 batteries you need 48V inverter. Sukam 3.5 KVA inverter will be 48V, which should again be good enough to support 4 batteries.

      Although with 3.5 kVA you can add lot many appliances, but then to support for 8 hours and 30 hours, you need that much. Please note that it will take about 10-12 hours to charge the batteries.

  • saurav suman

    hi sir, my need is 2 led bulb each of 14 watt, one laptop without any battery backup(means need continuous power supply, 8 year old laptop) and one cooler (usha cooler (CL601PM) 165 W as it is mention on the product) for 5 -6 hour, there is continuous power cut in my area .power remain hardly for 10 hour. so please suggest me good inverter battery combo. i am looking for exide invatubular (IT 750) 200 ah battery and exide pure sinewave ups 1050 va , will it be good to opt for this combo. please suggest me.

    also sir there is voltage fluctuation and low voltage problem in my area so which stabilizer should i opt for and of what rating

  • mohan

    hi
    could u suggest an inverter and battery combo for 1 fan 1 tube light 1cfl 1tv and a port for charging mobile and laptop, back up for 4-5 hours

    • https://www.bijlibachao.com Abhishek Jain

      A 450 VA inverter with 120 Ah battery should be good enough for your needs. Sukam, Luminous, Microtek are good with inverters, Amaron, Exide are good with batteries.

  • David

    Hi Abishek, I am planning to buy àn inverter set pls help me out. I am using maximum of 600wt, not regularly. I need 4-5 hours backup. What battery and inverter do you suggest? Someone refer tall power zone 150ah, is this good brand or enough for 5 hours? Or what should i buy for 5 hours back up? Thanks!

    • https://www.bijlibachao.com Abhishek Jain

      600 watts for 5 hours means 600 x 5 = 3000 Wh …. or 3 kWh or 3 units of electricity.

      Which means if you go for two 180 Ah batteries it would be perfect … or if you are tight on budget then two 150 Ah batteries (which would be optimized to store 3 units of electricity).

      As you need two batteries, you need a 24V inverter (12V for each battery). Smallest 24 V inverter would be a 1400 VA inverter.

  • Brar Col Hs Brar

    I am planning Roof Top Solar Power Project. I am to choose between Su kam 3.5 KVA 48 v fusion UPS and Su Kam 3 KVA 48 V PCU.
    Kindly advise which one shall I choose?

  • Amol Adat

    Hello Abhishek Sir ! Can I connect Luminous Zelio 1100 pure sinewave inverter with single Luminous tall tubular 220 ah battery ? Is it right combination ? Reason behind to buy 220 ah battery is long battery backup . I have 2 bhk home . [ 4 Tubes , 1 Television set , Videocon HD set top box , 2 celing fans , 0.5 HP motor for water need , Kent Grand plus water purifier ]

    • https://www.bijlibachao.com Abhishek Jain

      Hi Amol,

      220 Ah battery can store about 2-2.2 units of electricity. Which is 2200 Wh of electricity. Your total load would be 220 (for tubes) + 100 (TV+HD Set top box) + 180 (Ceiling Fans) + 350 (Motor) + 60 (Water Purifier) = 910 Watts.

      Now a lot depends on how much you use these appliances for. If you use all of them together for some time then 2200 Wh will last for 2200/910 = about 2-3 hrs. But I doubt you will use the motor all the time. Also other things will also not be used for all the time. My guess is that it would give you 4-5 hrs of backup.

      Looking at Specs of Luminous Zelio 1100VA, I think it should be good enough for your needs. Just make sure that you need just 4-5 hrs backup. Also note that 220 Ah at a charging current of about 13 Amp would charge the battery in 220/13 = 16-17 hrs.

    • Amol Adat

      Thank you so much Abhishek Sir for your valuable opinion.

  • Prasad AV

    Hello Abhishek. I need to better understand the battery configurations.
    1. Can I mix in series my two old 88AH batteries with two new 180AH battries in a new 48v inverter
    2. Can I mix in parllel my two old 88AH batteries with two new 180AH battries in a new 24v inverter
    3. Can I connect only 2 12v 88AH batter to a 48v inverter?

    • https://www.bijlibachao.com Abhishek Jain

      Be it parallel or in series, to get the best output, the internal resistances of the batteries have to be the same. If you mix then the lowest size will drive the output. You will get output, but it will be lower than expectation.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Prasad,

      I would not suggest mixing of battery sizes. Reason being that the output will be determined by the smallest battery. If the voltage of 88 Ah battery drops, current will also not flow from the 180 Ah battery. So effectively the output from 180 Ah battery would be similar to that of 88 Ah battery (as the current drawn from all the batteries would be same, but the internal resistance of both batteries would be different). The system will work because both are 12V batteries, but then the output will be as much as 88 Ah. So here is my answer:

      1) No
      2) No
      3) No because you need 4 12V batteries for making 48V.

    • Prasad AV

      Thanks for your answers. Can I mix 2old 88ah batteries(6yrs old) with 2 new 88ah batteries in series for a 48v inverter. I ask this because the batteries are good and I want to reuse it. I don’t want to throw it at dirt cheap prices.

    • https://www.bijlibachao.com Abhishek Jain

      Again adding two old and two new will work, but is not recommended, because internal resistances of old batteries would have changed over time and those of new ones would be different.

    • Prasad AV

      Thanks. I have made a decision to retain the old batteries with 1.6kv falcon plus inverter. I have a 3kv electric meter so I assumed that the lighting load of not more than 1.5kva. Also the wiring for lighting may not support 3.5kva peak load. So I was forced to go for lower kva.

  • SHAHID ABBAS

    Sir My power requirement is 500 watt and i neet back up of 6 hower in my area there is long power cut of about 10-12 hours so what rating of invertor and battery will be suitable for me pls reply

  • Ganga Suru

    hi abhishek.. good article, gained knowledge…
    still confusion with choose inverter.. can you help, i have two workstations and one fridge.. which runs continuously… i need three hours backup in most critical case., nothing else i want to use with inverter.. can you suggest good inverter

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ganga Suru,

      You can go for a Sukam Falcon + inverter (900 VA or 1100 VA both will work). This along with a 150 or 180 Ah battery should be more than enough for your needs.

    • SHAHID ABBAS

      Sir My power requirement is 500 watt and i neet back up of 6 hower in my area there is long power cut of about 10-12 hours so what rating of invertor and battery will be suitable for me pls reply

    • https://www.bijlibachao.com Abhishek Jain

      500 watts for 6 hours makes it 3000 Wh (= 500 x 6) … which means 3 kWh … so you need batteries to store 3 kWh …. which would be two 180 Ah to be on safe side or two 150 Ah (bit agressive). ….. and to support two batteries you need a 24V inverter (12V for each battery)….. smallest 24V inverter that you would get would be 1400VA.

  • Dorjee Wangdi

    Hello Sir i read your article and it was very usefull. I need a favor sir i am planning to buy a invertor which can run 1Led tv 15inch, 1 table fan, 8 CFL bulb 18w and charge a laptop plus i want it to last for atleast 2weeks so can u suggest me which invertor i should buy with how many betteries??

    • https://www.bijlibachao.com Abhishek Jain

      Hi Dorjee,

      If you want the setup to run off grid for 2 weeks, then the best solution is to either go for a Diesel Generator set or on solar (even Solar is doubtful, but DG should certainly work). I do not think inverter will work in your case as batteries cannot store that much energy that it can run for 2 weeks.

    • Dorjee Wangdi

      What if i use 2 or more batteries then will it work..??

    • https://www.bijlibachao.com Abhishek Jain

      The biggest batteries that are available are 220 Ah batteries. Each 220 Ah battery can store about 2-2.2 units of electricity. Two batteries can store 4 or 4.4 units of electricity.

      Your LED TV would be about 30 watts. Assuming you use it for 5 hrs a day, it would consume 30×5=150 Wh per day. In 14 days it would consume 150×14=2100 Wh or 2.1 kWh or 2.1 units.

      Table Fan would consume 50 watts. Assuming you use it for 10 hours a day, it would consume 50×10 = 500 Wh per day. In 14 days it would consume 500×14=7000 Wh or 7 kWh or 7 units.

      8 CFL bulbs of 18 W in 6 hrs a day would consume 8x18x6=864 Wh per day. In 14 days it would consume 864×14 = 12096 Wh or 12.096 kWh or 12 units.

      Laptop would consume 50 watts. Assuming you use it for 10 hours a day, it would consume 7 units in 14 days.

      So total you need is 2 + 7 + 7 + 12 = 28 units. So you need at least 14 batteries.

      To support 14 batteries you need 12 * 14 = 168 V inverter (each battery is 12 V). There is no inverter in market that can support so many batteries.

  • Sohail Merchant

    Hi Abhishek,
    Please suggest me a long life & good battery. I need a battery to use for 3 fans, 5cfls, 1tube light,1PC (LCD monitor-21inch), 1 LED (40inch). Please advice me what would be a better options. In my area there is lot of electricity issue (Load Shedding). I need back for apprx 4-5 hrs. And, one more thing not everything will be turned on at once apart from LED & PC (sometimes not always), 2 fans, 2 CFLs (always). I had taken batteries in the past but their life was only till 3 yrs. After 3 yrs they were of no use. Thanks a lot in advance.

  • Ankit Kumar

    HI,

    I have a 1 PC with 1000W consumption, 1 Laptop and a light 14 W, Can you suggest what inverter power is enough ? I want only PC only to run for 4-6 hr in worst case.

    Thanks

    • https://www.bijlibachao.com Abhishek Jain

      Are you sure your PC consumes 1000 W??? It’s unrealistically high. Typically PCs consume about 120-150 Watts.

  • Rohit kumar

    Sir what is difference between 32 bit DSP processor used in luminous zelio and 4th generation 44 pin micro processor used in sukam falcon + .Sir plz tell me which one is advanced and best

  • Siv

    Hi Abhishek,
    I’ve just started researching on inverters and this morning almost zeroed in on Sukam falcon + (1050 VA – dealer said 1100VA would take ages). How ever this evening I met a Microtek dealer who quoted me around 4000/- less for a similar configuration and said Microtek was the best and Sukam was dying (especially here in Hyderabad ).

    Now I’m very confused. Is Sukam really fading away? I need advice on which of these combinations would work out best:

    A) Sukam falcon+ 1050VA + SUKAM 180 Ah with 4 yes warranty at 19.5k/-
    B)falcon+ with exude inva 180 Ah?
    C) Microtek 1100VA with 150 Ah for 4k less?

    My usage would primarily be 2 LCD bulbs + 2 fans + very rarely LCD TV + WiFi modem for as long as possible.

    Appreciate your timely advice. Thanks.

    • https://www.bijlibachao.com Abhishek Jain

      I do not think Sukam is fading away. He is just trying to sell you microtek. I think Sukam is a good brand with great products. I would say go for Sukam inverter with sukam battery.

    • Siv

      Thank you Abhishek. I finally found a distributor closer to the area where I live and invariably went with a Sukam Falcon + 1100VA and Exide Inva Master tubular batteries (150 AH).

    • Siv

      Thank you for the assurance. The only bit i’m trying to decide is – Sukam 1100VA is unknown to the distributor and online – it takes at least 7 days. Nevertheless, I’ll probably go for Sukam then if he promises good service.

  • Rohit kumar

    Sir, i am confused between sukam falcon+ 1600av ,microtek hybrid 1600av & luminius zelio1500av.
    I have no budget issue .I want best inverter with best battery backup(10-12 hrs) especially.
    Plzzz sir guide me
    I want to run 1 19′ lcd tv + 5(25w) cfl + 3fans + 1 room cooler(when needed)

    • https://www.bijlibachao.com Abhishek Jain

      Sukam Falcon+ is a great inverter.

    • Rohit kumar

      Sir what about its battery backup and charging…
      In its manual written 2hrs backup for 150ah battery using 10 tubelights+ 2 cfl (for 1100av model)
      Plz tell me why its low??
      Is luminous zelio 900av has better battery backup and managment??

    • https://www.bijlibachao.com Abhishek Jain

      A 150 Ah battery stores about 1.5 units of electricity. 10 tubelights would be 10×55=550 Watts. Two CFls would be about 50 watts more. So total would be 600 watts. Total of 600 Watts in 2 hours would consume 600 x 2 = 1200 Wh or 1.2 kWh or 1.2 units of electricity. So a 150 Ah battery would support 10 tubelights and 2 CFL for more than 2 hours but less than 3 hours. And it is not just with Falcon+ …. any inverter with that size battery and that kind of appliances will support only 2 hours.

      The charging for typical 1100 VA model would be at rate of 13 Amp. So a 150 Ah battery will get charged in 150/13 which is roughly about 12 hours.

    • Rohit kumar

      Thanx sir for your reply.Now it has cleared my confussion.
      Sir,One last question
      In my area there is long power cut for 8-10 hrs.
      So suggest me right combination of best inverter and best battery that can give 10-12 hrs backup for running 6(15W) CFL + 2 ceiling fans + 1 table fan + 19′ lcd t.v(occasionally)??

    • https://www.bijlibachao.com Abhishek Jain

      To get that much backup, you would need at least two 150 Ah batteries. And for that you would need a 24 V inverter. Smallest 24V inverter would be a 1400 VA inverter. So you would need a 1400 VA / 24 V inverter with two 150 Ah batteries.

    • kingsleyuk2003

      Ok, what if he uses 12V inverter, and he connects the 2 150ah batteries in parallel. will Rohit kumar still get up to 10hrs. Or will it be about 5hr?

    • https://www.bijlibachao.com Abhishek Jain

      He can certainly put batteries in parallel, but then charging time will double up. Instead of 12 hours, it would take 24 hours to charge up the batteries.

    • kingsleyuk2003

      ok, so how many hours can he get. Thesame 10hrs or more or less.

    • https://www.bijlibachao.com Abhishek Jain

      Same 10 hrs.

  • Sohail Merchant

    HI,
    Please suggest me a long life & good battery. I need a battery to use for 3 fans, 5cfls, 1tube light,1PC (LCD monitor-21inch), 1 LED (40inch). Please advice me what would be a better options. In my area there is lot of electricity issue (Load Shedding). I need back for apprx 4-5 hrs. And, one more thing not everything will be turned on at once apart from LED & PC (sometimes not always), 2 fans, 2 CFLs (always). I had taken batteries in the past but their life was only till 3 yrs. After 3 yrs they were of no use. Thanks a lot in advance.

  • David

    I would be using
    12 pc,
    3 ceiling fan,
    6 wall fan,
    4 tubelight
    For my cafe .. which one will be suitable as I ve no idea about this.
    Thank you

    • https://www.bijlibachao.com Abhishek Jain

      You need 3 kVA inverter.

  • nitesh srivastava

    Hi abhishek. i need to run 1 fan, 1 modem, 1 cfl, 1 wireless landline phone and laptop for 8 to 10 hrs. Please suggest optimum inverter and battery.

    • https://www.bijlibachao.com Abhishek Jain

      Go for smallest possible inverter (say 400-450VA) and a 150 Ah battery. Better go for pure sine wave inverter.

  • Ulhas Tilekar

    Hello Sir,

    My requirement is like following

    2 Tubes = 2 X 40 = 80 W
    1 Fan = 1 X 90 = 90 W
    1 Laptop= 1 X 50 = 50 W
    1 Router= 1 X 25 = 25 W
    ==========================
    Total Requirement= 245 W per Hr

    My requirement varies from 6 to 8 hrs (Little pessimistic)
    245 X 6 Hrs = 1470 / 0.8 = 1838 /12 = 153
    245 X 8 Hrs = 1960 / 0.8 = 2450 /12 = 204

    so is it ok to go with following combination and add one more battery (may be after 1 year) if required?
    My friend recommended me for APC 1500 VA as it may take more load in case if we start multiple appliances load and one of best brand in world.
    Please let me know your guidance/suggestions?
    What should be frequency of Battery water check/maintenance?

    APC BR1500G-IN-Backup Power Supply – 13,745/-
    Exide Inva Tubular Inverter Battery 150 Ah – 13,750/-
    ——————————————————–
    27,495/-

    Note – APC claims about Power saving upto Rs 2000 per year with this model.

    Links to refer
    http://www.amazon.in/APC-Back-UPS-BR1500G–1500VA-Black/dp/B00B2LA7JK/ref=sr_1_2?s=computers&ie=UTF8&qid=1463623637&sr=1-2&keywords=APC+BR1500G-IN-Backup+power+supply
    http://www.amazon.in/Exide-Inva-Tubular-Battery-150Ah/dp/B012SV0C4C#productDetails

    Thanks and Regards,
    Ulhas Tilekar

  • Shashwat

    Sir mujhe ek office ke liye inverter battery chahiye.
    Office me 1pc 2 laptop 2 printer 1fan 1cooler 1modem 2cfl light chalana hai sir mai janana chahta hu eske liye kitne battery kitne Ah ka hona chahiye aur kitne VA ka inverter Lena chahiye office ke liye sahi hoga
    Aur kitne RS lagega aur kis company ka inverter battery accha rahega.
    Sir please guide me
    Thanks sir ji

    • https://www.bijlibachao.com Abhishek Jain

      How long do you want the backup for (in hours)? The Ah of battery will depend on that.

  • nidhi

    what is difference between pure sine wave, sine wave ,modified sine wave and square wave ?
    if i use 900va(considering future load requirement) instead of 700va (which is sufficient for my present load requirement) would it have any demerits??

    • https://www.bijlibachao.com Abhishek Jain

      There are only two types: sine wave and square wave.

      Modified Sine Wave and Square wave are one and the same thing. They have lot of harmonic distrortion and are in general not good for use with electronics. With ceiling fans and lights, they add some humming noise when in use. Pure sine wave will not have any noise. Pure Sine Wave is a must if you plan to run electronics.

      You can buy for future load as well. Bigger size may have some additional electricity losses. But then if you plan to add more appliances soon, then it is better to go for bigger one.

  • pravth

    Hi,

    We have power cut approx for 2 hours daily. I would be using, 3 tube lights, 2 fans, 1 setup box, 1 40″ LED TV.,1 port for laptop charging and 1 for Wifi modem charger. Could you please suggest the inverter and the battery I should go for. Thanks.

    • https://www.bijlibachao.com Abhishek Jain

      You can go for a 750 to 800 VA inverter (pure sine wave) with a 120 Ah battery. That should be good enough for your needs.

    • pravth

      Thank you Sir

  • shanmukh

    wow…. this is a nice article…

  • Janvi

    Hi sir, we r in chennai, and here the power cut is for almost 5 hrs, i would like to use
    1 tubelight
    1 cfl
    2 table fan
    190 ltr Fridge , pls suggest me a good inverter

    • https://www.bijlibachao.com Abhishek Jain

      Hi Janvi,

      Do you really want to include Fridge in it? It will significantly increase the size of inverter required.

  • RAVI

    Hi, I recently purchased V Guard DU 800 Plus inverter with 150 AH vguard battery.
    I have 1 TV , 3 Fans 3 CFL to use. The power. Cut is for. 8-11 hrs. But the inverter provides backup for just 4-5 hrs. Pls suggest any solution.

    • https://www.bijlibachao.com Abhishek Jain

      If 150 Ah battery is just providing 4-5 hrs backup then you need two of such batteries to get 8-10 hrs backup.

      But then each battery would be 12V. So your inverter has to be a 24 V inverter to handle two batteries. Typical 800 VA inverter cannot handle 24V. You will have to go for a 1400 VA inverter of 24V to connect two batteries.

  • Aditya Gupta

    hi Abhishek,

    I want to use the following appliances for a 4 hr backup:
    4 fans (90X4= 360)
    4 tubelights (50X4 = 200)
    3 cfl’s (25X3 = 75)
    1 LCD TV (42 inch) (150X1= 150)
    1 HD set top box (18X1=18)
    As per your instructions this comes to 803X 4 = 3212 watt hr or 3.2 kilo watt hr

    The VA of inverter 803/0.7=1147 VA

    The battery size 1147X4=4588 VAh
    4588/12= 382 Ah

    But as the inverter and battery are not available with these exact specifications, what is your reccomended combination of Inverter and Battery apt for my use.

    regards,
    aditya

    • https://www.bijlibachao.com Abhishek Jain

      Hi Aditya,

      You may not need 382 Ah battery as you may not use all your appliances all the time. I think 300 Ah should be good enough. In that case you will need two numbers of 150 Ah batteries. Each battery would be 12V, so total would be 24V. And the smallest 24V inverter would be about 1400VA inverter. So a 1400 or 1450 VA 24V inverter with two 150 Ah batteries would be good for you. You can certainly find 1400 VA/24V inverter in the market (Sukam, Luminous or Microtek).

  • Moni.Singh

    need a suggestion from you guys

    3 Fans
    2 A C
    1 Fridge
    1 Oven
    5 Lights

    • https://www.bijlibachao.com Abhishek Jain

      Would not suggest you to run ACs on inverter. Even a fridge would not be good on inverter unless it is a new inverter technology fridge.

  • हर्ष चौधरी

    I already own Microtek 625VA Pure Sine Wave inverter (With Luminious 150Ah Battery) – 04 years old. I recently bought a 2 BHK house and feel the need of beefier inverter.

    My existing peak load is 3x55W fans, 3x20W LED Tubelights, 1×40″ LED TV(Sony KDL-40W900A @130Watts but I run it on low power saving mode), 1xSTB(18 Watts), 1XKent RO System (Occasionally on inverter) but I don’t use them all but they have the inverter connection.

    My standard usage on inverter is generally 1×14 Watt CFL, 1x55W Fan, 1x130W LED TV, 1x18W STB, slew of other low wattage gadgets(occasionally), 1x600W Hand Blender (I don’t know how it runs but it runs- Usage is occasional)

    I want to add my refrigerator (253Ltr Samsung Digital Inverter Compressor – 2014 Model- RT27HAJYASA which is always set at 1 notch below optimal settings) which I don’t feel is feasible in the current setup. I want around 08 Hours on my standard load (I am rarely going to use my peak load) after including the Refrigerator. I feel a 2KVA System with two 150/160 Ah will be sufficient. Also, I may not be running the refrigerator on inverter all the time. I am provisioning it in case there is a grid failure, I may run the refrigerator for 4-5 hours, so the stuff inside the freezer (04 days of my backup milk supply) doesn’t melt.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Harsh,

      Even for your existing peak load, a 625 VA inverter is more than enough. But then if you want to add refrigerator then you may need to go with a 1000 VA. But if you want 8 hours backup, then you may need more batteries. So you will have to go for a bigger system. You can go for 2 kVA but I think even 1400 VA/24 V system with two 150 Ah batteries would be good enough. Refrigerator would not have a lot of power consumption in 4-5 hours so two 150Ah should be fine.

      Also your hand blender would run slow if it does not get good enough voltage, but yes it would still run (just like a ceiling fan). But it would not need very high startup current.

      I think you should go for 1400VA/24V system with two 12V 150Ah batteries.

  • Wasi Ahmed

    hi,
    I am planning to buy an inverter and I am looking for backup of
    3 fans
    3 tube lights
    2 LCD desktops
    1 router
    1 40″ LCD (optional)
    I am looking for back up for 4 to 5 hours. I am being offered zelio 1100 and RC 150ah, is it a good option. what options do I have. will it be sufficient for my requirement. please help me with this.

    • https://www.bijlibachao.com Abhishek Jain

      1100VA inverter would be sufficient but only one 150 Ah battery would just give you about 2 hours of backup. You will need two 150 Ah (total of 300 Ah) to get 4-5 hrs of backup. Also because you need two batteries, so two batteries will total up to 12V + 12V = 24V. So it will be better for you to go for a 24V inverter rather than a 12V inverter. The smallest 24V inverter you would get would be around 1400VA. So you need 1400VA/24V inverter with two 150 Ah batteries for 4-5 hrs backup.

  • Radhika Chiluka

    Hi,
    am planning to take a inverter .
    I need 1 fan
    3 tubelights
    mixi of 750wats capacity (optional)
    LCD tv including sundirect setup box

    suggest me which to take preferably with company name as i dont have any idea of this.
    and how much does it cost for inverter and battery

    • https://www.bijlibachao.com Abhishek Jain

      Hi Radhika,

      I would not suggest including mixi in the setup as it can significantly increase the size of inverter you would need. Otherwise for the rest of the things a 450 VA inverter would be more than enough. The size of battery will depend on the number of hours you want to use these appliances on inverter.

      Typically batteries are the most expensive part of any inverter. A battery would cost anywhere above Rs 8000 depending on the size that you need. Rs 8000 is for smallest 80Ah battery. You also need to replace batteries every 4-5 years.

      Inverters are cheaper. They cost about Rs 3000-4500.

  • Baleshwar Mishra

    I need a suggestion from you guys

    2 fans

    5 LED (7 watt per)

    1 LED TV 24″

    1 Laptop

    1 Desert cooler medium size

    Suggest me a good Inverter & Battery or combo

    • https://www.bijlibachao.com Abhishek Jain

      850 VA should be good enough for your load. How long (in hours) do you need the back up for?

  • D.P.Joshi

    Thanks for providing a very valuable information. Pls let me know Microtek inverter EB700 fitted with Exide Inva Plus 1500 Fully charged can run an air cooler Koolair 40(Havells) 150 watts (Hrs Reqd) also how much time it will take for the inverter battery for regaining full recharge(Charging duration required) Once again thanks.

    • https://www.bijlibachao.com Abhishek Jain

      700 VA inverter should be able to run your air cooler. So I do not think there is any problem with that. If you check the specs of the inverter, it says charging current is 10 Amp. So a 150Ah battery will get fully charged in 15 hours.

  • ലാലാല ജ്പത് റോയ്

    hi
    my required load can go upto 700W, So as per your tutorial, I think I require 1000VA inverter. I checked many models of sukam like falcon+, falcon++, brainy eco, falcon HBU. Can you suggest me a good inverter out of these. Is there any other inverter in the market with star rating

    • https://www.bijlibachao.com Abhishek Jain

      I think Falcon+ and Falcom++ are great models.

  • Vyasmaharaj

    Hi .
    I need inverter for two ceiling fans 2 8 watt cfl and 230 ltr inverter technology Refrigerator. Power cut is just 2 hours a day .Kindly guide me which inverter I should buy??. Thanks and Regards. Vyasmaharaj

    • https://www.bijlibachao.com Abhishek Jain

      Two Ceiling fans would be 180 watts, Two CFLs would be 16 watts, Refrigerator would be max 350 watts. Total would be around 550 watts. I think a 650 or 700 VA inverter would be good enough with a 120 Ah battery.

  • Anindya

    Hi Abhishek,

    At any given time, maximum I will need, 2 tubes, 2 fans, one mobile charging point, one microwave (limited use), one CFL. I need backup of at least 4 hrs and if more the better. What inverter and what battery shall I purchase?
    Cheers.

    • Anindya

      If I leave microwave aside but need backup for longer time say 6-7h hrs,then?

      I want an inverter that can handle if I add another battery in future.

      Cheers

    • https://www.bijlibachao.com Abhishek Jain

      HI Anindya,

      If you leave out microwave a 450VA inverter would be more than enough for you. But if you add microwave then you will have to increase it to 1450 VA or more (depending on the size of the microwave). Any heating or cooling appliance has significantly high electricity consumption. A 150 Ah battery should be more than enough for your use.

  • Avinash Mahato

    Hi Abhishek,

    My requirement is

    2 Tubelight

    2 fan

    4 desktop with LCD screen

    3 Laptop

    1 AC(1 Ton)

    Backup time required: 4 hours approx..

    Please suggest me a good choice else pleases suggest me a good inverter and battery combination.

    Regards,

    Avinash

    • https://www.bijlibachao.com Abhishek Jain

      Hi Avinash,

      Inverter is not good for running AC. If you want to run AC then it is better to go for DG set.

  • Suresh RM

    Hi Abhishek,

    First of all thanks a lot for the simple and detailed explanation. My requirement is

    3 Tube lights – 40W (120W)
    3 fans – 90 W each (270W)
    1 led tv 32″-100W
    1 set top box-25W
    1 Mixer grinder / 1 wet grinder – 350 W
    1 Laptop with router
    1 Refrigerator 190 L wirpool brought 6 years back

    Backup time required: 6 hours approx.

    Kindly suggest the best possible options .

    Thanks,
    Suresh RM

    • https://www.bijlibachao.com Abhishek Jain

      Is it really necessary to have Grinder and Refrigerator in the mix? It will significantly increase the size of inverter required.

    • Suresh RM

      No not necessary . I can exclude fride , AC and wet grinder. I may need mixer

      Thanks
      Suresh rm

    • https://www.bijlibachao.com Abhishek Jain

      Mixer Grinder is also a motor. I think if you want to use that then you will need a 2.5 kVA inverter. I would say go for a 2.5 kVA/24V inverter with two numbers of 150Ah batteries.

    • Suresh RM

      Thanks abhishek. Sorry for not putting my requirement clear. I will use. Mixer grinder only in need time and will switch off other fittings. In this case what is the capacity I should look for ? Also can u suggest some of the brands and models I should look for.

    • https://www.bijlibachao.com Abhishek Jain

      I would suggest going for a 1000VA Sukam Falcon+ for your usage. However if you need 6 hours backup, you would need about 3 units of electricity. Which means you would need two numbers of 150 Ah batteries. In that case, Sukam Falcon + 1400 VA with 24 V would be needed (24 V to support two 12V batteries). Faclon+ and Falcon++ can handle high inrush current, so you may run Grinder as well on it.

    • Suresh RM

      Thanks a lot for your suggestion.

  • Rut

    Hey,

    I have calculated my usage according to the given equations. It comes out as requirement of 350ah battery and 625KVA Inverter. This is for home purpose and we have to live for around 8hrs in a day and twice in a week so require battery with more capacity.

    What brands would you suggest for inverter and battery?

    Key concerns for the brand:
    1. Should provide good service.
    2. Longativity

    One more thing is I have space for inverter in the loft in dark passage. What should I keep in my in terms of inverter/battery heating when placed in such a place?

    Thanks.

    • https://www.bijlibachao.com Abhishek Jain

      Go for 1400 VA / 24 Volt inverter. Each battery is 12V and for 350 Ah you would need two numbers of 180 Ah batteries to make 24V (12V + 12V). Also please note that the charging current for most inverters is about 13-15 Amp. So 180 Ah battery will get charged in 180/15 hrs.

      It is better to keep batteries in open space. Not just heat, they also release some fumes.

      You can look at models from Sukam, Luminous or Microtek.

    • Rut

      Which brand you prefer for inverter? Actually I have got ideas about battery and Exide battery seems to be good but in terms of Inverter it is really confusing.

    • https://www.bijlibachao.com Abhishek Jain

      Sukam, Luminous or Microtek are leaders for inverters.

  • Parminder singh

    I had purchased India battery around four years ago. It is of 12 volt with 150 ah. Earlier it was giving very less back up. Now it seems it is dead. Even after charging continuously it is not giving a single min back up. How can I ensure that it us really dead.

    • https://www.bijlibachao.com Abhishek Jain

      The performance of a battery can be measured using “Specific Gravity” test. If the specific gravity is about 1.26 then it is completely charged. If it goes below 1.18 and does not increase even after charging, then it is dead. Any technician who deals with inverter/battery in your area should be able to check it out using a hydrometer.

  • Gaurav Singla

    Hi Abhishek, I am planning to buy an inverter and here are my back up requirements:

    4 tube lights – 40W each
    3 ceiling fans – 100W each
    1 LED tv 43 inches – assuming 100W
    1 HD set top box – 20W
    I refrigerator of 350 L capacity – assuming 350W

    Based on the equations and formulae you have provided, it seems like I will need a battery set up of about 650 Ah. Is my calculation accurate?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Gaurav,

      Here is the calculation:

      4 x 40 = 160
      3 x 100 = 300
      1 x 100 = 100
      1 x 20 = 20
      1 x 350 = 350

      160 + 300 + 100 +20 + 350 = 930 Watts.

      In terms of VA that comes to 930/0.8 = 1162 VA … let’s take roughly 1200 VA.

      But there is a catch …. You have a refrigerator. If it is a non-inverter technology compressor refrigerator, then it would need 3-4 times more starting current. Typically, in that case, a 2.5 kVA inverter would be recommended. However, these days there are many inverters available that can handle high starting current without going for a larger capacity (e.g. Sukam Falcon+). So you either go for a regular inverter of 2.5 kVA or a 1200 VA -1400 VA one that can handle high inrush current.

      Also the size of battery (in Ah) will depend on number of hours of backup (time for which you want to run the appliances on batteries) that you need. It won’t be 650Ah.

    • stalin

      hi Abhishek,

      I want to use the following appliances for a 4 hr backup:

      tubelight 3

      computer 3

      cfl 3

      tv 1

      battery size 180ah * 3 is available

      But as the inverter not available with these exact specifications, what is your reccomended combination of Inverter a apt for my use.

  • Rajat Gupta

    Hi Abhishek,Iam following Bijli Bachao for past 3 years and it helped me alot.I really appericiate the ratings and layman approach towards technical details.

    My requirement is

    3 Tube lights – 40W,28W,20W (88W)

    2 fans – 90 W each (180W)

    1 led tv 32″-100W

    1 set top box-25W

    1 Refrigerator 310 L(LG GL-T322GP) – 140 W(Defrost Capacity)

    Backup time required: 4 hours approx..Total load 533W

    Kindly suggest the best possible options

    • https://www.bijlibachao.com Abhishek Jain

      Hi Rajat,

      I don’t think your refrigerator is the new inverter technology compressor refrigerator. I guess it is an old one (with regular compressor). Regular compressors have a high initial current and in regular cases I would have suggested 2-2.5 kVA model (just to handle the high initial current). However these days many inverters claim to handle 2-3 times more initial current (some claim to even handle 6 times inrush current). I think something like Su-kam Falcom + 900VA or 1100 VA of 12V should be good with a 150 Ah battery.

    • stalin

      hi Abhishek,

      I want to use the following appliances for a 4 hr backup:

      tubelight 3
      computer 3
      cfl 3
      tv 1
      battery size 180ah * 3 is available

      1 LCD TV (42 inch) (150X1= 150)

      1 HD set top box (18X1=18)

      As per your instructions this comes to 803X 4 = 3212 watt hr or 3.2 kilo watt hr

      The VA of inverter 803/0.7=1147 VA

      The battery size 1147X4=4588 VAh

      4588/12= 382 Ah

      But as the inverter not available with these exact specifications, what is your reccomended combination of Inverter a apt for my use.

      regards,

      stalin

    • Rajat Gupta

      Thanks Abhishek for the prompt response and guidance.

    • Rajat Gupta

      One more thing, for refrigerator I have voltage stablizer will it affect the initial current.

    • https://www.bijlibachao.com Abhishek Jain

      No it will not. Even with Stabilizer, the initial current will be high.

  • D.P.Joshi

    Havells air cooler some cooler motor is aluminium winded while the other are copper, what is the difference copper v/s aluminium which one is more durable, also cooler motor fan some 3 or 4 or even five , so which one will make less noise(not exhaust fan) Kindly let me know.

    • https://www.bijlibachao.com Abhishek Jain

      Copper is a better conductor of electricity and thus, copper models are more energy efficient. Copper is also more durable. In general copper windings in a fan make them last longer. As for number of blades, a 3 blade fan is much more optimized and should make less noise.

  • Trideep

    Hi Abhishek,

    Am looking for a solution for a place where they have 8-10 hours of power cut on a daily basis. The basic requirement would be 1-2 fan, 2-3 cfl/led and 1 crt tv. What would be the ideal solution and any recommended brands? This will be in the North East, so we wont have a huge selection of brands.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Trideep,

      Normally a 450 VA inverter would have been more than enough for your appliances, but a 450 VA inverter comes only in a 12V variant which can connect only 1 battery. For 8-10 hrs backup you would need two 150Ah or 180 Ah batteries. Each battery is 12V so two batteries make it 24V. The smallest 24V inverter you would get in market would be of 1400 VA. Which can actually support 3-4 times more appliances than you currently have. But if 8-10 hrs backup is a must then you will have to go for 1400VA inverter of 24V with two 150Ah or 180 Ah batteries (bigger the battery, more the backup). You can go for the likes of Sukam, Luminous or Microtek inverters (better go for same brand inverter/battery combo).

  • RAJESH SHARMA

    hi, abhi sir i have sukam shinewave inverter 850va with sukam long tubular 150ah battery combo. but my inverter or battery regularly consumes about 200watts electricity wtihout power cuts (no power cuts for long time ).this consumption shown by electric meter whenever checked . but when i plug out inverter and battery from main line then meter shows zero consumption . why this occur ??????? due to this reason my electricity bill remian very high with last 2 year . pls tell me solution or reason ………. with regards

    • https://www.bijlibachao.com Abhishek Jain

      200 watts is quite high. That would be 2 units in 10 hours of usage or more than 4 units in a full day (that is much more than what a refrigerator consumes). Most likely the battery would have gone bad. But if there are no power cuts, why are you using it?

    • RAJESH SHARMA

      thanks abhi sir, what are the symptoms of battery gone bad. my su kam battery is 4 years old, it also consumes very high quantity of water regularly. and their is very small power cuts 5 to 10 minutes in a day or 3 to 4 days not regularly . pls tell that on stand by mode a battery should consume how much electricity in watts??

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Sharma,

      To check if an inverter battery has gone bad, engineers check the specific gravity of the acid inside it. Typically specific gravity of sulphuric acid (acid inside the battery) is 1.84. When it is diluted with water, it goes down to 1.2. A battery has gone bad if the specific gravity is much below that number. Any battery guy should be able to test that for you. They will use a hydrometer to test it. I cannot comment on how many watts it may use on stand by mode.

  • eswar_n

    is the godrej(875 VA DLX) inverter and exide(IT 500 150AH) battery comb is correct or not.we are getting so many problems with this comb.It doesn’t charge and it does n’t goes to mains mode etc.. If this comb is wrong then tell me the reason

  • JOJO

    dear Mr. abhishek
    Pls suggest me best inverter for 4 fans, 3 tube light, 4 cfl, 32 tv lcd

    • https://www.bijlibachao.com Abhishek Jain

      You should go for a 850 VA sine wave inverter. A 150 Ah battery can give you 3 hours backup.

  • D.P.Joshi

    Hi, I have microtek EB 700 inverter & exide unvatubular 150 Ah battery, Can I run a Havells air cooler copper winded with five fan leaf, as per their manual it is 150 Watts and can run on inverter, can it run in the inverter and battery mentioned above for short duration say for an hour or two. Pls clarify.Thanks D.P.Joshi Vill Bharatpur Distt Rampur U.P

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Joshi,

      You can certainly run a 150 Watt cooler on a 700 VA inverter.

  • Gupta

    Hi Abhishek,

    I have few doubts and I am sure you will be able to help.

    1.
    I can see 2 type of batteries “tabular” and “Tall Tabular”. Please
    suggest the difference as Not found anything for this by google.

    2.
    have a 1000 va UPS. But UPS comes with 7ah battery. can I replace 7ah
    battery with 80/100ah battery to run LED TV+WIfi+setup for 2-3 hours.

    regards,

    Gupta

    • https://www.bijlibachao.com Abhishek Jain

      Hi,

      Here is my response:

      1) As the name suggests the size of the battery is taller as compared to normal tubular battery which gives more life and low maintenance.

      2) It is strange that you have a 1kVA system with just 7 Ah battery. 7 Ah is too small and can just give few mins of backup for an appliance like Desktop. I would suggest not to disturb the back of the UPS and having another Inverter for the purpose for other loads. The cost of inverter is much less as compared to the cost of battery.

  • Shekhar Iyer

    Hi abhishek, My questions are as follows

    1. For the following requirements is there any inverter battery combo for less than 10k that I can order them from amazon and can supply power for 3-4 hours?

    1 tube light 50 watts
    2 Laptops 100 watts
    wifi = 10 watts

    Are these 2 products a good choice? 1. Exide 150AH New InstaBrite Inveter UPS Battery – 36 Month Warranty & APC Home UPS 850VA Sine Wave BI850SINE
    or should I opt for a tubular battery of exide as you had mentioned that tubular batteries are good in the long run but it has only one review from amazon ( Exide Inva Master Tubular Battery 150Ah/12V (White & Red))

    2. Is the installation easy or should I use a local electrician for installation.
    3. If the power keeps coming and going every 15 mins, does the inverter keep switching from inverter to power and vice-versa automatically? Does it keep charging automatically in case power comes?
    4. Lastly i think it helps to cut down our electricity bill as we are not charged while using inverter?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Shekhar,

      Here is my response:

      1) Laptops are typically not more than 60 Watts. Your total load would be about 180-200 Watts. So even a 400 VA inverter would be more than enough (because your load is mostly resistive and the power factor would be close to 1). 850 VA would be a lot for that load. A 100 Ah battery would give you more than 5 hours backup. 80 Ah can give you 4 hours.

      Getting it for less than 10K would be difficult because the battery itself would not come for less than 7K. And the inverter would be additional 3-4K. The options you have chosen are too big for your needs.

      2) You should get it installed by a local electrician.

      3) If power keeps coming and going, then the inverter will keep switching automatically. It does charge automatically when power comes. So you do not have to do anything.

      4) If you buy an inverter with intelligent battery management feature, then it will switch off automatically when the battery is charged.

    • Shekhar Iyer

      thanks

  • saroj

    hi can u suggest any ac for 150 sqft room.budget 40k

  • Picmeup

    Hi Abhishek, This is a wonderful article. Can you also shed some light on typical charges for installation of an inverter? In an existing 2 bedroom house, what should be the charges.

    • https://www.bijlibachao.com Abhishek Jain

      Hi,

      Do you want to know costs for buying an inverter/battery system or installation? Cost of buying will depend on the appliances that you have and hours of backup that you need. Cost of installation will depend on how much your local electrician charges. It varies from city to city as cost of human labor varies in cities.

    • Picmeup

      I was looking for ball park estimates for cost of installation

  • Ananth

    I need a suggestion from you guys

    2 fans 200watts
    3 tube lights 150 watts
    1 CFL 25 watts
    1 LED TV 100 watts
    Settop 25 watts
    Laptop 50 watts
    wifi 10 watts

    Suggest me a good Inverter & Battery or combo

    I need to purchase online as i dont have enough visibility at home towns. Request you to share the links to purchase online.
    I need 3-4 hrs backup continously. Please suggest me a combo (i feel combo is good, not sure). or suggest me a inverter and battery to purchase online.

    Just fit and forget type. no other maintainance with good warranty. (close to 36 months or 24 months)

  • Anup Raghunath

    Hi,

    My requirement is

    2 led lights
    2 fans
    1 led tv 32″
    1 settop box
    1 wifi

    Backup time required: 4 hours approx..

    I was planning for Sukam Falcon+ 1100 and Exide inva tubular 150. Please suggest me a if it’s a good choice else pleases suggest me a good inverter and battery combination.

    Regards,
    Anup

    • https://www.bijlibachao.com Abhishek Jain

      Hi Anup,

      From whatever you have listed, the load would not even be 250 watts. For that kind of load even a 400-450 VA inverter would be more than enough. And I am sure not all of it would be used for full 4 hours. Even if you keep everything on, then with a 150 Ah battery, you can run everything for 6 hours. So your choice is much more than enough for your needs. You can go for a smaller size as well if you want. Or if you plan to add more appliances on inverter then you can go for this one as well.

  • saroj

    hi abhishek I am planning to buy a inverter for 4cfl 2tbl 1crt tv 4fan around 700w load for 8hrs
    .pls suggest which brand with model and supportive battery.

    • https://www.bijlibachao.com Abhishek Jain

      For 8 hours backup, you would need at least 2 batteries of 200 Ah. So I would say go for a 1400VA 24 Volt inverter with two numbers of 200 Ah batteries.

  • NITIN NILEKAR

    Hi Abhishek,
    Its very informative chat that i have gone through, its an helping guide for first time user like me.
    Well i will also need your help since i am planning to buy an inverter for my 2 BHK flat,
    4 cfls, 2 tube lights,3 fans,1-32′ LCD TV,1 double door refrigerator,1 air cooler for approx 5 hrs.
    pls suggest which would be the best brand inverter with model no and supportive battery details,
    also it would be greatfull if you could give it with price estimation so as to make the quick decision.

    Thanks a lot in advance :-).

    Regards,
    Nitin Nilekar.

    • Imsoftware lab

      Hi abhishek, nice site and just the information i was looking for. So if I want to just powerup one laptop through a charger, one tube light and wifi for around 4 hours (during which time I think I should be able to charge my laptop so that I can use it once the inverter stops) in about 4 hours, then can i get an inverter and battery combo for under 10k for my requirements

    • https://www.bijlibachao.com Abhishek Jain

      Hi,

      Your total power requirement would not be more than 120 watts (and mostly electronics with high power factor) so a 150VA inverter will also be good enough for your needs. And for 4 hours you would not need more than 0.5 units of electricity, so even an 80Ah battery would be more than enough. But then batteries are costly. I guess you can get a 150 VA inverter for about 3K while 80 Ah battery may cost above 7K. It will cost slightly above 10K. I am not able to find anything specific online to make a recommendation. But many brands (Sukam, Luminous, etc) have 150VA inverter and Exide, etc have 80 Ah batteries.

    • https://www.bijlibachao.com Abhishek Jain

      I would suggest that you look at Sukam Falcon+ 1600 VA/24 V inverter (http://sukamfalcon.com/) and use it with two 200 Ah batteries.

    • NITIN NILEKAR

      Thanks a Lot sir..

      It would be a great help if you can share the approx price of (Inverter +2 batteries)all inclusive.

      Awaiting your valuable response.

    • https://www.bijlibachao.com Abhishek Jain

      The inverter would cost you about Rs 7000 and the batteries would cost you about Rs 16-17K each. So total cost would come around Rs 39000. Batteries are most expensive element and they are needed because you have appliances like cooler for 5 hrs backup.

  • Prashant

    Hi ,
    I have earlier installed a 150 watt solar panel , a Luminous 850VA hybrid solar inverter and a Luminous solar battery model LPT 200L .
    But now my requirements have increased as i have installed a Samsung smart convertible refrigerator having inverter technology ( Model RT27JSMSASZ Top Mount Freezer with Digital Inverter 253 L) . i have average need of 1125 watts .

    so what should i do to fulfill my requirements.
    if i have to buy i would like Luminous products so please suggest!

    Thank You!
    Prashant Priyadarshi

    • https://www.bijlibachao.com Abhishek Jain

      Samsung Smart Convertible can easily run on 850 VA inverter, but it all depends on what all other things that you run on it. Average of 1125 watts will not run on 850VA inverter. You need a bigger inverter. Or separate out appliances on two different inverters.

  • pawanm

    we need a inverter with tabular battery for 04 desktop pc with LED monitor ,01 printer (EPSON L 220),04 led bulb(07 watt),02 silling fans,and 01 tube light.
    kindly suggest the which company and how much amount i have to pay???

    • https://www.bijlibachao.com Abhishek Jain

      Hi Pawan,

      For your setup, a 1400VA inverter would be good. The size and number of batteries will depend on the hours of backup that you need on inverter.

    • pawanm

      need 04-05 hours backup .

    • https://www.bijlibachao.com Abhishek Jain

      You should go for a 1400 VA 24V inverter with two 200 Ah batteries. That would give you 5 hours backup. Also you should go for a pure sine wave inverter as you have electronics to run on it. Sukam Falcon 1400VA/24V inverter should be good for you.

  • srikanth

    I live in Chennai where blackouts of 6 hours or more are now very common. Last year we had no power for 3 consecutive days following the deluge in December. As a result of this experience. I would like to have back up power, if feasible, for 2 full days to run a Samsung 331 litre fridge ( model Samsung RT33JSRZESP Frost-free) which, the manufacturer claims consumes only 261 units of power in a year.

    Besides the above, I would also like to power 2 ceiling fans for 24 hours a day for two days and 4 CFL lights for 12 hours a day for 2 days.

    Cost is not a consideration. However, I would like the inverter to have the flexibility to be charged by solar panels and a diesel generator.

    Will greatly appreciate your guidance. Thank you very much

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Srikanth,

      I guess your refrigerator is the latest inverter technology refrigerator. It should not consume more than 1 unit a day.

      2 ceiling fans 90 watts each for 24 hours would consume: 2 x 90 x 24 /1000 = 4.32 units of electricity in a day

      4 CFLs of 23 watts each for 12 hours would consume: 4 x 23 x 12 /1000 = 1.1 units of electricity in a day.

      So total energy requirement for a day would be 1 + 4.32 + 1.1 = 6.42 units. So in 2 days it would be 12.84 units.

      The biggest battery commonly available in 200 Ah batter that can store 2 units of electricity. So to store 12.84 units you would need 6-7 batteries. Each battery is 12V, so to support 6-7 battery you need an inverter that can handle 12×6 = 72V inverter.

      Microtek has a 3 kVA 72 V inverter. Luminous has 5 kVA 72 V inverter. But your appliances won’t need 5 kVA so 3 kVA should be enough.

      Microtek’s 3kVA 72 V inverter would cost about Rs 30,000. Each battery would cost 17-18K each.

      If you want flexibility to be charged by grid or by solar then you will have to go for a solar conversion kit. Su-kam has a solar conversion kit to convert regular inverter to solar-grid hybrid. But I am not sure if it can handle a big system like this one. You will have to check with Su-kam on that.

      A solar 1 kWp system would generate 4 units of electricity per day. So if you want to charge the batteries in one day then you would need 3 kWp system. Else 1 kWp system can charge it in 3 days. A 1 kWp system would cost about Rs 75-90K.

    • sreenivasan srikanth

      Dear Mr. Jain,

      I greatly appreciate your clear response which puts the whole thing in perspective. I did not quite realise that I would need 6-7 batteries! I will analyse my requirements in light of what you have said and revert with further questions, if need be. Thank you so much for your reply. Regards,

      Srikanth

  • Arihant

    Can I use a single 12V big battery like 200 Ah for a 24V Inverter?? Pls. suggest

    • https://www.bijlibachao.com Abhishek Jain

      You will need two of them 12V + 12V to make 24V.

  • Ananth Kumar

    I need a suggestion from you guys

    3 fans 300watts
    3 tube lights 150 watts
    1 CFL 25 watts
    1 LED TV 100 watts
    Settop 25 watts
    Laptop 50 watts
    wifi 10 watts

    Suggest me a good Inverter & Battery or combo

    I need to purchase online as i dont have enough visibility at home towns. Request you to share the links to purchase online.

  • vasudevan

    pl suggest inverter and battery capacity for 3 bed room house. I use 1pc (60w) + 2 fan (60 w each) 1 tv (100w) + 3 tube light (60 w each) for 6 hours back up. thanks vasudevan

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would be about 565 watts (the numbers you have mentioned look slightly off). So a 750-800 VA inverter should be good for it. Assuming only 75% of the appliances are on at any given time, the 6 hour consumption would be about 2.5 units. If you go for 800 VA inverter then it would just be 12V inverter which can have only one battery. The biggest battery that you can get is 200 Ah which can store 2 units and would give you about 5 hrs backup. So if 5 hrs backup is fine, then 800 VA inverter with 200 Ah battery would be fine. If you want 6 hrs backup, then you will have to go for a 1400 VA inverter of 24V, which can support 2 numbers of 120Ah batteries. In that case you can get up to 6 hrs backup.

    • vasudevan

      Thanks for your detailed reply

  • ashok joshi

    my requirement-32’LCD 8led 15 watt,1fan only for 2-3 hours than which battery i should purchase flat plate or tubleor battery

    • https://www.bijlibachao.com Abhishek Jain

      Tubular batteries are better than Flat plate batteries.

  • shaikh

    Hi Abhishek;
    Need your help, I am looking for good Inverter/UPS and my requirement would be 1 ’32’ led, 2 Ceiling fans, 4 ‘7watts’ LED bulbs, 1 Laptop.
    where I am looking for backup 5-6 hrs. please guide me on this along with good brand too.

  • suresh

    Hi Abhishek,
    I have 3 CFL, 1 tube light, 42″ Plasma TV , 2 fan & Refrigerator please advise on the Inverter & the battery suitable.

    Thanks
    suresh V

    • https://www.bijlibachao.com Abhishek Jain

      Plasma TVs actually consume a lot of electricity. It would be about 300 watts. 3 CFLs would be about 60 watts. Tubelight 50 watts, 2 fans would be about 180 watts and refrigerator another 300 watts. So total would be about 900 watts. So a 1400-1500 VA inverter should be good enough. One with 24 V would be better. Two 200 Ah batteries should be able to give you 5-6 hrs backup.

    • suresh

      Thank you

  • Sagar

    Hi Abhishek,
    Appreciate the informative article. By the above formula I’ve freezed on buying a Pure Sign-wave 850/900 VA inverter with 150 Ah battery. Wanted specialist opinion from you on the below;

    1) Which brand of inverter can i buy keeping efficiency (power wastage) and durability factor in mind.

    2) Whether to buy Tubular battery or a Flat plate battery keeping charge drainage, warranty and maintenance in mind.

    3) How much additional costs will be incurred wrt. to the current electricity bill?

    Thanks much.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Sagar,

      Here is my response:

      1) Brands like Sukam, Luminous, Microtek have been traditionally know for making good inverters. Okaya, Amaron, Exide have been known for batteries. These days inverter manufacturers have gotten into batteries and battery manufacturers have gotten into inverters. Also buying same brand inverter battery combo makes it better from service viewpoint.

      2) Tubular batteries are better than Flat plate batteries.

      3) Additional cost will depend on the amount of energy you store and the efficiency of the inverter. In general inverters have about 90% efficiency.

    • Sagar

      Thanks for the info Abhishek. !!

  • Prince

    Hi abhishek,

    Recently I purchased 900 VA luminous sinewave inverter with luminous tall tubular battery. My problem is when my fans are on inverter backup mode they are working slower compared to working on direct electricity. Even if just one fan is working its runs slower. As per dealer there is no issue with inverter and it’s normal.

    Can you please tell me is it normal ?

    • https://www.bijlibachao.com Abhishek Jain

      Fans run slower when the voltage is low. Somehow the inverter is not able to provide right voltage. It should not be like that. I do not think it is normal.

    • prince VARGHESE

      dear abhishek , for the above matter i called luminous installation person who checked that direct electricity coming thru gvt line is 235 volts & supply thru inverter is coming 206 volts on inverter mode , same thing he showed on the other new peice which he brought along with him. He said that in inverter mode voltage is fixed by company in between 206 to 210 volts by default & on double battery or higher models voltage will be recieved as we are getting from govt line . is it true ?? they made it check on other new pcs so i can’t complain that my inverter is not working fine ?? pls reply

    • https://www.bijlibachao.com Abhishek Jain

      Hi Prince,

      Battery voltage does play a role and you would certainly get better output with two 12 V batteries than one 12 V battery. But then the speed should not drop too much at 210V. I think the reason would be that you would have a square wave inverter rather than a pure sine wave inverter. Does your inverter make a humming sound when you put on a ceiling fan? If yes then you have a square wave or modified sine wave inverter. If no, then it would be a pure sine wave inverter. A pure sine wave inverter is expensive, but it has very less losses and thus it does not impact fan speed. A modified sine wave inverter will have losses which can result in reduced speed of ceiling fan. There is nothing much that can be done if you have a modified sine wave inverter. Adding two batteries is possible only if your inverter can handle it. And then again increasing the size does not make sense if you do not have that much load.

    • prince VARGHESE

      Thank you very much Abhishek for responding to my mails inspite of whole a lot of querries you have to answer on daily basis. regarding my querry its a pure sine wave Luminous Zelio 1100 Sine Wave Home Inverter with Luminous Electra LT 550N 160 AH Tall Tubular Battery. it is not modified sine wave or square wave. Backup is very good but only issue is the drop of voltage (206 volts compared to 230 volts which we are getting from govt electricty line) on inverter mode which reduces fan/cooler speed.

      My last question Is this problem with everybody or just me ??

    • https://www.bijlibachao.com Abhishek Jain

      Hi Prince,

      We have not heard about such complaint from anyone else.

  • Kumarvel

    Hi Abhishek,

    Im planning to buy a LUMINIOUS ZELIO
    1700 model with 2 x 220ah batteries since its a 24v inverter. I added up
    my total load as you have explained so very well in your above article.
    My load adds up to 925w in total. Can you tell me if the above model
    would suit my needs and @ full 925w load running how many hours back up i
    can get ?

    Also the rating for this system is 1500w max
    i think ? So does that mean when there is grid power also i can only
    have 1500w max thru the inverter running in my home ? What if i want to
    have about 2000w of load running thru the inverter WHEN there is power
    from the grid ? Will that be possible please ? Im asking because its a
    large home and we would (for flexibility sake) like to have all rooms
    supported by this UPS but we wont necessarily use more than 1500w in
    case of a power failure.

    If the above is a yes, then
    hypothetically when the power fails and at that moment if incidentally
    there is a 2000w load running, will the UPS identify it as an overload
    and buzz at it usually does for an overload so that we can manually
    switch off appliances and lower the load ?

    Thanks in advance

    • https://www.bijlibachao.com Abhishek Jain

      Hi Kumarvel,

      1500 VA inverter for 925 W load looks more than enough. The batteries you have selected should give you about 6 hrs of backup.

      Also when you cannot connect more than 1500 W to the inverter. Your electrician will make sure that only those appliances are connected to the inverter that the inverter can handle. So a separate connection will have to be made for some appliances through the inverter.

  • Pranjal Jain

    Very informative article. Helped me choose an inverter for my new apartment. Thanks. BTW, what do you have to say about the new type of inverters being advertised to support even Air Conditioners, are they just bait or do these perform well in the long run?

    • https://www.bijlibachao.com Abhishek Jain

      Hi Pranjal,

      The biggest challenge with Air Conditioners is that their initial startup current is very high. For normal operation they may need just 9-10 Amp current, but to startup that may shoot up to 20 Amp or more. I am increasingly seeing that manufacturers are making inverters that can handle 4-5 times more instantaneous current than the normal current they provide. So yes manufacturers are making such inverters.

      On top of that the new breed of ACs with inverter technology do not need high startup current. And thus a lower capacity inverter can easily handle such ACs. So yes they can perform.

  • Prasun Rai

    Hi Mr. Abhishek, my requirement is of running a 32″ LCD TV,1 Set Top Box, 3 LED Tubeligts-20 watt, 2 ceiling fan, 1 Cooler & 1 260 L Samsung Fridge for at max. 5-6 hrs. Kindly suggest an apt inverter for my use.

    • https://www.bijlibachao.com Abhishek Jain

      Hello Mr Rai,

      The total wattage of appliances would be about 1000-1200 watts. You have a fridge and cooler that would need high startup current, but then these days inverters claim to handle much more startup current than their rated VA value. So I think a 1600 VA 24 V inverter should be good.

      I think a Sukam Falcon+ 1600 VA/24V inverter with two 200Ah batteries should work for you. You can look at this: http://www.su-kam.com/power-solution/inverter-ups/falcon-plus

  • Akshant Gupta

    please suggest inverter size and number of batteries for 1 Ton inverter AC (Hitachi Kashikoi 5400) and 1 260L LG inverter fridge, and maybe 2 tube lights.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Akshat,

      Hitachi Kashikoi 5400 1 ton AC has maximum power input of 1250 watts whereas nominal power input (at 1 ton) is 850 watts. Still let’s assume that some time it will run at peak capacity. So that is 1250 watts. LG Inverter fridge would also have max about 150 watts power input. And 2 tubelights would have about 100 watts. So all in all it would be about 1500 watts. Now power factors of these appliances would not be bad so ideally a 1600 VA inverter should have been fine. But just to be safe a 2 kVA inverter should be good for all of them.

      Now batteries will depend on hours of backup that you want. A 1 ton inverter AC would consume about 1.6-2 units in 4-5 hours. Fridge would hardly consume 0.2-0.3 units in that much time (not even that). Tubelights would consume another 0.5 units in 5 hrs.

      So if you go for a 2 kVA inverter which would be mostly 24V, then if you go for 2×150 Ah batteries that can store about 3 units of electricity. It can work well for 4-5 hours for your setup.

  • Gurpreet Singh

    Hi Abhishek,
    I want to run 3 fans, 3 led(120w), 1 tubelight, 1 router, 1 40″ vu led tv. Please suggest, should i go with flat plate or tubular battery inverter. I am looking for a long battery life. Which brand is the best in terms of warranty n service?
    Someone suggested me okaya tubular and inverter as its the no.1 brand in tubular as per his saying.

    Thanks in advance.

    • https://www.bijlibachao.com Abhishek Jain

      Here is my response:

      1) Tubular batteries are better.
      2) Go for same brand inverter-battery combo. You would get better warranty and service.
      3) Okaya is a good battery brand. Su-kam, Luminous, Microtek are top inverter brands.

    • Gurpreet Singh

      Thanks Abhishek..

      150 AH and 900 VA should be enough for my requirment?

      if you can help me in choosing the brand between Microtek, Sukam and okaya that will be great.

    • https://www.bijlibachao.com Abhishek Jain

      Your total wattage would be 3×90 (fans) + 3×120 (LED) + 50 (tubelight) + 80 (TV) + 5 (router) = 765 watts. Assuming all run at any given time and power factor of 0.8 the VA value would be 765/0.8 = about 950.

      But then I guess not everything would run at any given time so 900 VA should be good. Also let’s assume only 70% of the appliances are on at any given time, the total instantaneous wattage would be 765*0.7 = 535 watts. So a 150 Ah battery that can store about 1.5 units, would give a backup of about 3 hours.

      Brand wise all three are good, Sukam in general has better features.

  • Theerta Prasad

    Hi sir,
    Thanks lot for providing very informative insight on inverters.
    I request you to guide me to decide which type of inverter I should buy? My requirements are
    3 ceiling fans, 3 Tube lights, 1LCD TV 32 “, 1 air cooler, 1 desktop, 3 CFL required for 6 hrs

    • https://www.bijlibachao.com Abhishek Jain

      Your total VA value would be about 1100 VA (about 900-1000 Watts). I think a 1600 VA/24V inverter with two 200 Ah batteries should work well for you. However please note that 200 Ah battery will take about 200/15 = 13 hrs to charge the battery completely. You should also go for a pure sine wave inverter as you have LCD and Desktop to run on it. I think Sukam Falcon Plus 1600 VA/24V model should be good with two 200 Ah batteries.

    • Theerta Prasad CS

      Thanks a ton sir

  • Chaitanya

    Hello Sir,Need your suggestion here.Thinking to buy a new inverter with battery.My usage is 4 tube lights,4 Fans and one 32″LED tv with Router.Please suggest me right power for it for 8 hrs backup.Also suggest the best brand in it.

  • Vikram

    Hello Sir,
    Thanks for the wonderful insight on the Invertors. Its pretty helpful.

    TV – 100 W
    Router – 5 W
    DTS set top box – 25 W
    PS4 – 200 W
    External Storage – 5 W

    The total load that i want to run on backup: ~ 350 W / .8 = 438 VA

    Total number of hours for which backup is required: 1 Hour
    438/1 = 438 VAH
    A regular inverter battery available in market is of 12 V, so the Ah value of battery required would be:
    438/12 = 40 Ah

    I already have gen backups in my apartement. But it usually takes 10 mins for the maintainece to bring it up. So anywhere between 10 mins to 60 mins would be ideal. I dont want my ps4 or my router to reboot because of that power cut. So in this case do I need to go for online UPS? Does inverter or offiline ups would also be fine in this case? Can you recommend some product as well?

    • https://www.bijlibachao.com Abhishek Jain

      Hello Vikram,

      Your calculations are correct. Online UPS can be good, but it will be expensive. Also it will have more electricity losses. You should go for an Inverter/UPS that has fast switching and pure sine wave. If the inverter/ups switches in milliseconds, then there won’t be a reboot. Something like Su-kam sine wave falcon inverter/ups should be good.

    • Vikram

      Awesome. Thank you so much for you help :) Appreciate it

  • bina

    sir, my requirement is 2 CFL,2 FANS,1 LED TV FOR 6 hours back up, pls suggest a good inverter plus a battery.
    Preferable for village use.

    • https://www.bijlibachao.com Abhishek Jain

      A 450 VA inverter with 150 Ah battery should be good enough for you to run the appliances you have mentioned. Because you have a LED TV, a pure sine wave inverter would be better for you. Sukam, Luminous, Microtek are some good inverter brands.

  • Raja Sahoo

    Sir,

    I have purchased Luminous 2KVA Sine Cruze Pure sine Wave inverter.However iam confused regarding the batteries which need to be used.My doubt is Which will be the best – 2*150Ah exide batteries or 2*200AH exide batteries?Also what will be charging time for the same combination?

    • https://www.bijlibachao.com Abhishek Jain

      Depends on the charging current of the inverter. I could not find the exact details in the specs available online. Typically inverters have a charging current of about 12 Amp. In case of big ones, it goes up to 15Amp (max 20 Amp is what I have seen). If it is 15 Amp then a 150 Ah battery will get charged in 150/15 = 10 hrs. A 200 Ah battery will get charged in 200/15 hrs.

      However, the choice will also have to depend on the backup you need. 2*150 Ah batteries would store about 3 units of electricity while 2*200Ah would store 4 units. And so 2*200Ah would last longer.

    • Raja Sahoo

      Thank you for the reply.I have one final question in the same regard.If I use Luminous 2KVA sine wave inverter along with 2*200AH batteries what will be the additional power increase in my electric bill per month(Approx)?

    • https://www.bijlibachao.com Abhishek Jain

      Ideally a 2*200 Ah battery should store 4 units of electricity but Inverter are generally 90-95% efficient. So max 4.5 units is what I would guess for 1 charge. Rest all depends on how frequently your power goes. Inverter itself should have a better power management feature and should not consume a lot when batteries are charged.

  • nilesh

    Is it better to have battery/inverter combo from the same manufacturer from a service perspective? I was zeroing on sukam inverter + exide tubular battery until somebody told me that the better to go with the combo from same company. This has delayed my purchase. Any help is appreciated.

    • https://www.bijlibachao.com Abhishek Jain

      It is certainly better to go for a battery/inverter combo from the same manufacturer from service perspective. So you have heard the right thing.

  • Nitin

    I need a inverter for my home to run 3 ceiling fans ; Total CFL 100w & 32′ Led & set top box to run around 6-7 hrs.
    Please suggest a good long life inverter & battery.

    • Nitin

      I need a inverter for my home to run 3 ceiling fans ; Total CFL 100w & 32′ Led & set top box to run around 6-7 hrs.
      Please suggest a good long life inverter & battery. [ i also messaged 6 days back.]

    • https://www.bijlibachao.com Abhishek Jain

      3 ceiling fans would be about 270 watts, plus 100 watts of CFL and 50 watts of LED+Settop box would make it 420 watts. A 600 VA inverter with 150 Ah battery can give you about 4-5 hrs of backup. If you go for 200 Ah battery then it can give you about 6 hrs of backup, but then it will take a long time to charge (about 20 hrs). A 150 Ah battery can charge (full) in 14-15 hrs. You can go for a Sukam, Luminous or Microtek inverter. Going for same brand battery+inverter would be good. Also look for pure sine wave inverter (as you have electronics to support).

  • Sanjeev

    Hi Abhishek ,

    Very nice article neat and clean !!

    This is sad to to tell you that i am also one of the sufferer of regular Power Cut in Kolkata.

    So my question is to you that if I need 3 CFL each 20Watt one 42″Tv and 3 ceiling fans then what should be the exact power consumption and what would be the ideal inverter and battery for my home ?

    Awaiting for your suggestion.

    Thanks a ton.
    Sanjeev

    • https://www.bijlibachao.com Abhishek Jain

      total wattage = 3×20 + 100 (worst case) + 3×90 = 430 watts.

      A 600 VA inverter should be good enough to support this. Add 150 Ah battery and it should give power backup of 3 hours.

  • Ansh

    Sir I really appreciate your article, I didn’t knew anything about inverter and batteries, now I feel like i know lot..
    would really appreciate if you can tell how i can tell how i can get to know which battery to buy in combination of inverter. I am looking for 900VA inverter but don’t know which AH battery will fit into it.
    As I am looking to buy online.

    • https://www.bijlibachao.com Abhishek Jain

      Hi Ansh,

      Most brands recommend an ideal battery size for inverters. However, you need to know your daily consumption to determine battery size. If you need 1 unit or kWh backup then 100 Ah battery. 1.5 units then 150 Ah, 2 units then 200 Ah. Each battery would be 12 V. Typically inverter charging current would be 10-12 Amp. So a 200 Ah battery will charge in 200/12 = about 15-17 hrs. A typical 900 VA inverter could only support one 12 V battery. So suppose you need 4 units backup then you need two 200 Ah batteries and in that case you will have to go for 24 V support (so you would need a bigger inverter).

  • Bharat Kumar

    One dealer told me 12000 rs for luminous inverter 850 v and luminous battery 150 ah
    Is it reasonable rate or not
    my requirement is 3 fan and 3 cfl and one led tv

    • https://www.bijlibachao.com Abhishek Jain

      850 VA is a lot for your needs. As per the calculations even a 450 VA should work … but if you want to be extra safe, even 600 or 650 VA would work.

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