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

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).

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).

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.

Hi Abhishek,

I am looking for an office inverter.

2 tubelights

4 fans

3 CFLs

4 charging points

Power so far hasn't gone for more than 1 hour yet, but would be good to have an inverter recommendation for the worst case scenario (8 hours minimum) and best case as well (i.e. upto 3 hours). Is it better to have a sine wave inverter?

Thanks.

Hi Abhisek,

Can you please help me with the below ones and suggest me the best inverter to use.

2 TLs for 8 hours

3 CFL for 2 hours

2 Fans for 8 hours

Desktop for 8 hours

Please advise me!

Do you mind assisting me to purchase an inverter for the following usage....

2 fans

2 tube light

3 LED bulb 14watt

32" LED TV, set top box

1 refrigerator

Overall 6 to 8 hours of back up.

Please advice me with the good brand and model.

Never seen such a great a great articles. i was not aware of all of this electrical terms but now i understand something in this domain. if i do not appreciate you, then that would not make sense.

I heard that the make Cyber Power has a very amazing hybrid inverters(support both solar and normal) that has incredible performance and quality. A friend also recomment to purchase this product. Can you please let me know how ofter the inverter could get damaged? what is the life of an inverter(not battery).

Also how ofter we need to add distilled water in batteries for better performance?

thanks

jinesh John

Hello Abhishek,

My requirements are 9 led bulbs of 5 watts, one fan,one freezer, one geyger only occasionally used, one desktop, one mixer grinder. Back up 6 to 8 hours.Please suggest to me the right type of inverter and approximate cost of one.

Here is your calculation:

LEDs = 9 x 5 = 45 Watts -- 8 hrs electricity consumption = 45 x 8 = 360 Wh or 0.36 units

Fan = 1 x 90 = 90 Watts -- 8 hrs electricity consumption = 90 x 8 = 720 Wh or 0.72 units

Fridge = 1 x 375 = 375 watts --- 8 hrs electricity consumption about 1 units.

Geyser = 1 x 3000 = 3000 watts --- electricity consumption depends on size of water heater ... assuming 1.2 unit of electricity consumption for about 50 lts hot water.

Desktop = 1 x 150 = 150 watts --- 8 hrs electricity consumption = 150 x 8 = 1200 Wh or 1.2 units

Mixie = 1 x 700 = 700 watts --- assuming 30 mins operation = 700 x 0.5 = 350 Wh or 0.35 units

Total Units needed = 0.36+0.72+1+1.2+1.2+0.35 = 4.83

Total wattage = 45 + 90 + 375 + 3000 + 150 + 750 = 4410. So VA value needed = 4410/0.7 = 6300. So you would need about 6.5 kVA inverter.

It will be better if you go for a 6.5 kVA diesel generator than going for 6.5 kVA inverter.

Dear Abhishek,

Do you mind assisting me to purchase an inverter for the following usage....

4 fans

3 tube light

2 cfl

LED TV, set top box

4 fan

1 refrigerator

Overall 6 to 8 hours of back up.

Please advice me with the good brand and model.

Appreciate your help.

Thanks

Imthax

Here is your calculation:

Fans = 4 x 90 = 360 Watts -- 8 hrs electricity consumption = 360 x 8 = 2880 Wh or 2.88 units

TLs = 3 x 50 = 150 Watts -- 8 hrs electricity consumption = 150 x 8 = 1200 Wh or 1.20 units

CFL = 2 x 23 = 46 Watts -- 8 hrs electricity consumption = 46 x 8 = 368 Wh or 0.37 units

TV+STB = 1 x 80 = 80 Watts -- 8 hrs electricity consumption = 80 x 8 = 640 Wh or 0.64 units

Fridge = 1 x 375 = 375 Watts -- 8 hrs electricity consumption about 1 unit

Total units needed = 2.88 + 1.2 + 0.37 + 0.64 + 1 = 6.09 units

Total Watts needed = 360 + 150 + 46 + 80 + 375 = 1011

Assuming only 75% of appliances are on at any given time, units needed = 6.09*0.75 = 4.56

To store that much electricity you will need three batteries of 150 Ah. And because you need 3 batteries, you will have to go for a 2.5 kVA inverter because that would be the smallest that can support three batteries (in series). You can look at these models:

Sukam Fusion Pure Sine Wave Commercial UPS 2.5kVA/36 V

Luminous Cruze 2.5 KVA Sine Wave home UPS

Microtek Digital SOHO inverter 2.5kVA/36V

You will have to go for 3 numbers of 150 Ah tubular batteries with these (same brand as inverter or Exide/Amaron batteries).

Hii Abhishek,

Please suggest me to purchase a right inverter with battery in brand for...(give me option on the battery model )

2 fans

2 led bulb

2 tube light

32"inch LED TV+DTH

Backup required 5 - 6 hours a day

Thanks

Sridhar

Here is your calculation

Fans = 2 x 90 = 180 Watts --- 6 hrs electricity consumption = 180 x 6 = 1080 Wh or 1.08 units

LED = 2 x 15 = 30 Watts --- 6 hrs electricity consumption = 30 x 6 = 180 Wh or 0.18 units

TLs = 2 x 50 = 100 Watts --- 6 hrs electricity consumption = 100 x 6 = 600 Wh or 0.6 units

TV+DTH = 1 x 80 = 80 Watts --- 6 hrs electricity consumption = 80 x 6 = 480 Wh or 0.48 units

Total units = 1.08+0.18+0.6+0.48 = 2.34 units.

Total watts = 180+30+100+80 = 390 watts

Although VA requirement is less, but just because you need long battery backup, so you need a 220 Ah battery. And to charge that on time you need a 1100 VA inverter. You can look at these:

Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zazl4TuuuN )

Microtek UPS SEBz 1100 VA (1.1 KVA) Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zas6WTuuuN )

Luminous LZ1100SW Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/ZUlAbTuuuN )

These along with a 220 Ah battery would be needed.

Plz suggest me which type of inverter and battery are require for 1 Ton AC.

If you are using a non inverter tech AC then 1 ton AC would need 3 kVA inverter. A 1 ton AC would consume about 1 unit of electricity per hour. 3 kVA inverter would be 36V inverter so it can take 3 batteries. If each battery is 220 AH (biggest available) then it can store 2.2 units of electricity. With 3 batteries you can store 6.6 units of electricity.

So 3 kVA/36V inverter with three 220 Ah batteries can run your AC for 6-7 hrs.

Hi Abhishek, plz give me your suggestion, what VA inverter is required for luminous 200 ah battery.

At least a 1100 VA inverter would be needed.

Hi Abhishek, thanks for your wonderful article with such details.

2 fan, 1TV, 4 CFL that roughly goes to 450 watt, but need them for 6-7hrs(continuously). Doing your suggested calculation Exide invatubular 230ah battery will be enough I guess. What could be the inverter unit to charge the battery within 5-8 hrs? Please do correct me if I'm wrong in my calculation and suggest me if you've something else to tell like going for two battery or two inverter.

Thanks

Hi Kumar,

450 Watts for 7 hours = 450 x 7 = 3150 Watt-hour or 3.15 units. 230 Ah battery will not be able to support it. You will have to go for two numbers of 180 Ah batteries to be safe. And for that you will need a 24V inverter (smallest of which would be a 1400VA inverter). You can go for Exide Invatubular batteries. They are good.

sir i want to purchase ups or inverter with battery with good brand ,

i want to run

4 fans

4 led of 20w

2 charger

1 blander for 2 hours running

and i need 8 to 10 hours back up . as well as some time 1 cooler run for 1 hour not all time . sp plz suggest best inverter and bettry as well as 6 to 8 hour back up for above mentioned things except cooler

Here is your calculation:

Fans = 4 x 90 = 360 watts --- for 8 hours you need 360x8 = 2880 Wh or 2.88 kWh

LEDs = 4 x 20 = 80 watts --- for 8 hours you need 80x8 = 640 Wh or 0.64 kWh

Charger = 2 x 5 = 10 watts (assuming mobile charger) --- for 8 hours you need 10x8 = 80 Wh or 0.08 kWh

Blender = 1 x 700 = 700 watts --- for 2 hours you need 700x2 = 1400 Wh or 1.4 kWh

Cooler = 1 x 300 = 300 watts --- for 1 hours you need 300x1 = 300 Wh or 0.3 kWh

Total Units needed = 2.88 + 0.64 + 0.08 + 1.4 + 0.3 = 5.3 kWh.

To store that much electricity you need 3 batteries of 200 Ah. So you will have to go for 12x3 = 36 V system. The smallest would be 2.5 kVA system.

You can look at these:

Sukam Fusion Pure Sine Wave Commercial UPS 2.5kVA/36 V

Luminous Cruze 2.5 KVA Sine Wave home UPS

Microtek Digital SOHO inverter 2.5kVA/36V

You will have to go for 3 numbers of 200 Ah tubular batteries with these.

Hii Abhishek

Plzz suggest me to purchase a right inverter with battery in brand for...

4 fans

4 led bulb of 9 w

10 hours backups..

Here is your calculation:

Fans = 4 x 90 = 360 watts

LEDs = 4 x 9 = 36 watts

Totals = 396 watts (about 400 Watts). For 10 hours you need 400x10 = 4000 Wh or 4 units of electricity. To save the same you need two batteries of 200 Ah. And to support two batteries you need a 24V inverter. So here are a few choices for you:

Sukam Falcon (+ or ++ series)

Luminous Zelio 1700 (Zelio is one of their most popular range)

Microtek UPS SEBZ 1500 VA

And two 200 Ah batteries along with this.

Abhishek ji

I want to purchase a inverter for

3 led bulb

1 led tv

1 dth box

please help me to purchase the inverter and bettery

thanks

Here is your calculation

LED bulb = 3 x 15 = 45 watts

LED TV = 1 x 60 = 60 watts

DTH = 1 x 25 = 25 watts

Total would be 130 Watts. Which is 130/0.7 = 185 VA.

You can go for a Sukam Micron 250VA inverter/ups with 50 Ah battery. It can work for 4-5 hrs.

Hi Abhishek,

I want to purchase inverter with battery, so help me to right purchase.

3 fan

1 exhaust fan

3 tube

4 cfl - 20 w

1 40" LED TV

1 set top box

1 fridge.

For 8h backup. Help me the best brand inverter and battery.

Here is your calculation:

So VA value needed is about 1500 VA and units to be stored are 6280/1000 = 6.28. To store this much electricity you will need to go for a 3 battery system each battery of 220 Ah. And thus you will have to go for a 36V system. Which would be at least 2.5 kVA system.

You can look at these:

Sukam Fusion Pure Sine Wave Commercial UPS 2.5kVA/36 V

Luminous Cruze 2.5 KVA Sine Wave home UPS

Microtek Digital SOHO inverter 2.5kVA/36V

You will have to go for 3 numbers of 220 Ah batteries with these.

Hi Abhishek, Good day!

I would like to reduce the load since i want to reduce the cost of investment.

Please advise once again.

2 fan

1 exhaust fan

2 tube

4 cfl - 20 w

For 8h backup. Help me the best brand inverter and battery.

Here is your calculation:

Fans = 2 x 90 = 180 Watts -- 8 hrs electricity consumption = 180 x 8 = 1440 Wh or 1.44 units

Exhaust = 1 x 75 = 75 Watts -- 8 hrs electricity consumption = 75 x 8 = 600 Wh or 0.60 units

Tls = 2 x 50 = 100 Watts -- 8 hrs electricity consumption = 100 x 8 = 800 Wh or 0.80 units

CFLs = 4 x 20 = 80 Watts -- 8 hrs electricity consumption = 80 x 8 = 640 Wh or 0.64 units

Total units needed = 1.44 + 0.6 + 0.8 + 0.64 = 3.48 units

Total Watts needed = 180 + 75 + 100 + 80 = 435 watts

Assuming only 75% of appliances are on at any given time, units needed = 3.48*0.75 = 2.61

To store that much electricity you will need two batteries of 150 Ah. And because you need 2 batteries, you will have to go for a 1.4 kVA inverter because that would be the smallest that can support two batteries (in series). You can look at these models:

Sukam Falcon (+ or ++ series)

Luminous Zelio 1700 (Zelio is one of their most popular range)

Microtek UPS SEBZ 1500 VA

And two 150 Ah batteries along with this (same brand as inverter or Exide/Amaron batteries).

Thank you Mr. Abhishek.

Which type and which brand battery is good. Please advise.

Go for tubular battery. Exide and Amaron are best battery brand, although you can go for the same brand inverter and battery (like luminous combo or sukam combo).

sir

please suggest me i want to run 22" led tv with set top box at least 6 hours back up which battery and inverter or ups is suitable for it

Your TV would be 60 Watts and STB would be about 20 Watts. Total would be 80 Watts. In 6 hours it will consume 80 x 6 = 480 Wh or 0.48 units of electricity. Also VA value would be 80/0.7 = 114 VA. You can go for something like Sukam Micron Home UPS of 250 VA with 50 Ah battery.

Hi Abhishek

I want to purchase inverter with battery, so help me to right purchase. For,

4 fan

1 cooler

1 32" LED TV

1 mixy for 20 min

4 5w led

1 fridge.

For 8h backup. Help me the best inverter and best battery also with brand.

Here is your calculation

Fans = 4 x 90 = 360 Watts

Cooler = 1 x 300 = 300 Watts

TV = 1 x 60 = 60 Watts

Mixie = 1 x 700 = 700 watts

LED = 4 x 5 = 20 watts

Fridge = 1 x 375 = 375 watts

Units required for 8 hours =

360x8 + 300x8 + 60x8 + 700x(20/60) + 20x8 + 1000 (fridge would consume about 1 unit in 8 hrs) = 7153 Wh or 7.153 units.

To store that much electricity you would need a 4 battery system (each battery 200 Ah) .... and thus you will have to go for a 12x4 = 48 V inverter.

That would be an expensive system. Let me know if you really want to go for it and I will suggest you some models.

Hi Abhishek,

Which one of the below batteries would you suggest to take along with luminous Zelio 1100va inverter

1) luminous tubular RC18000 150 ah

2) Exide instabrite 150 ah

You can go for luminous tubular RC18000 150 ah and I think with the combo you will get a better warranty.

Hi Abhishek!

You had been really helpful to people in answering their questions.

Here's something which I wanna know.

1. What appliance must be chosen for power failure. I mean solar or battery invertor?

2. Then which company or make would you suggest?

3. My usage would be:

32" inch TV

HD set top box

Digital Invertor AC 1 ton

2 fans

3 cfl lights

1 laptop

2 mobile chargers

For six hours

Hi Priya,

Here is my response:

1) Depends on your budget. Solar is quite good but expensive. If you have budget and power failures are long and frequent then Solar may turn out better. But if power failures are short and occasional then regular power inverter would be better. Please note, battery will be needed in both to store electricity.

2) Do you really want to run an AC on inverter? I am asking this because AC will not only increase the size of inverter, but also because it consumes much more electricity (as compared to the other things), the size and number of batteries needed will also be a lot. For your information here will be the calculation:

TV - 1 x 60 = 60 watts --- 6 hrs power consumption = 60 x 6 = 360 Wh or 0.36 units

STB - 1 x 25 = 25 watts --- 6 hrs power consumption = 25 x 6 = 150 Wh or 0.15 units

AC - 1 x 1400 = 1400 watts (this is the peak wattage of a BEE 3 star rated 1 ton inverter AC) ---- power consumption = 6 x 0.5 = 3 units

Fans = 2 x 90 = 180 watts --- 6 hrs power consumption = 180 x 6 = 1080 Wh or 1.08 units

CFLs = 3 x 23 = 69 watts --- 6 hrs power consumption = 69 x 6 = 414 Wh or 0.42 units

Laptop = 1 x 60 = 60 watts --- 6 hrs power consumption = 60 x 6 = 360 Wh or 0.36 units

Mobile = 2 x 5 = 10 watts --- 6 hrs power consumption = 10 x 6 = 60 Wh or 0.06 units

Total wattage = 60+25+1400+180+69+60+10 = 1804 Watt (out of which 1400 is only for AC) = 1804/0.7 = about 2.5 kVA

Total unit consumption = 0.36+0.15+3+1.08+0.42+0.36+0.06= 5.43 units (out of which 3 units are only for AC and 1 unit of Fans).

Assuming only 70% of appliances are used at any given time units consumed would be 5.43*0.7 = 3.81 or roughly 4.

Now usually 2.5 kVA inverters are 36V inverters, so you will have to go for 3 battery system. So three 150 Ah batteries would be required to store 4+ units of electricity.

You can look at these:

Luminous Cruze 2.5 KVA Sine Wave home UPS

Microtek Digital SOHO inverter 2.5kVA/36V

With 3 batteries of 150 Ah (you can go for Exide, Amaron, or for the same brand as that of the inverter like Luminous or Sukam). Your system size (and cost) will decrease significantly if you remove AC from the mix.

Hello Abhishake,

I just bought a luminous zelio 1100 model inverter and 165 ah amaron tall tubular battery. Since it is a pure sine wave inverter, I thought fans doesn't slowdown when running on inverter. But I am noticing considerable reduction in speed of the fans ( around 40 percent ) and a bit reduced brightness in tube lights. Is there any problem with my inverter or battery? If not, why does this happen when it is pure sine wave?

Thanks.

Hi Sandeep,

Usually speed slowdown does not happen with pure sine wave inverter. It happens only with modified sine wave or square wave inverter. It looks like a problem with the inverter. You should get your inverter checked by Luminous.

Thanks for your advice abhishek. I'll do it.

Hi, Abhishek

I read many articles on bijlibachao.. very informative and useful.

this article is also very useful and you have replied to all queries.. that is very appreciating.

i have 1 kw solar system as a stand alone without grid supply .

with 250w x 4 panels, solar charge controller 30amps, 1400vs /24v inverter, 200Ah x 2 batteries

this used to generate around 3.5 units perday.

recently inverter is not working.

can i replace luminous zelio or any other inverter please suggest,

my doubt is my old inverter has a connection for inverter switch from thr solar charge controller.

Hi,

You will have to go for a solar inverter. I doubt that luminous zelio is a solar inverter. Or if you want to use luminous zelio then you will need a solar conversion kit that converts regular inverter to solar inverter. I think it is better to go for a solar inverter. You can go for Luminous Solar NXG Hybrid Inverter 1500 VA.

How many hrs any inverter can run ,in big power failure, if I will use a single 15 watt led bulb load ,using @100ah battery with 700va,inverter,and till power rehabilitation can I charge battery with 100 Watt Solar panel?

The calculation is simple. A 100 Ah battery can store 1 unit or kWh of electricity. A 150 Ah battery can store 1.5 units or kWh of electricity.

1 kWh = 1000 Watt-hour.

Now if you have a 15 Watt bulb then the hours it can run on 1000 Wh = 1000/15 = 66.67 hrs.

A 1 kW solar panel can generate 3-4 units of electricity in a day. So a 100 Watt solar panel can generate 0.3 to 0.4 units of electricity in a day. Or 300 Wh to 400 Wh electricity.

It will take 3 days or about 72-80 hrs to charge the battery again.

Pls share me which UPS or invertor and battery i should buy for following usage as i am going to use it near coastal region. Also suggest me link to purchase with costing. Thanks

2 fans

5 led bulbs

1 40 inch tv

Here is your calculation:

Fans = 2 x 90 = 180 watts

LEDs = 5 x 15 = 75 watts

TV = 1 x 60 = 60 watts

Total = 315 watts. So the VA value needed = 315/0.7 = 450 VA

A 100 Ah battery can store 1 unit of electricity and give 3 hrs backup.

You can look at these:

Microtek UPS SEBz 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/k9chxTuuuN )

Su-Kam Shark 700 Va Square Wave Inverter (Flipkart Link: http://fkrt.it/klbvXTuuuN )

Luminous ECO VOLT 700VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/xE44z!NNNN )

you can go with any of these with a 100 Ah battery.

I would like you to advise me on the the type of inverter and batery capacity for the following:

1. Desktop PC (High End Gaming System) running with COOLER MASTER V1000 psu [3 mins back up needed only for Shutting down the PC]=1000 watts

2. Led and lcd tvs (140+100= 240)watts

3. led bulbs (9 watt)x 5 unit=45 watts

4. ceiling fans 2x100=200 watts

backup for 1 hr is sufficient for these appliances except for the desktop PC (High End Gaming System) that i have mentioned earlier at the begiining.

Hi Mrinal,

Your total wattage = 1000+240+45+200 = 1485 watts. So your VA value would be about 2 kVA. And usually 2 kVA inverters are 2 battery inverters (24V). Even though your backup required is quite less and you can do with a single battery (that too a small one). But just because the VA value is more, you would need to go for 2 battery system. I think you can go for a 2 kVA inverter with two numbers of 100 Ah batteries.

Thank you for ur response. One more request to you and that is:

Can u suggest me the inverter and the batteries? That will be very helpful

You can look at Luminous Cruze 2 KVA Sine Wave home UPS. That will be the best for you. This along with two luminous 100 Ah batteries would be good.

4 fans - 4 hours back up.

3 Led bulbs - 25 watts - 4 hours back up.

1 led TV - 1 hour back up.

1set up box - 1 hour back up.

1 mixer - 30 mins back up.

2Router - 6 hours back up.

Please let me know the inverter and battery combinations for my requirement.

Thanks,

Karthik

Here is your calculation

Fans = 4 x 90 = 360 Watts --- in 4 hours consumption = 360x4 = 1440 Wh

LEDs = 3 x 25 = 75 Watts --- in 4 hours consumption = 74x4 = 300 Wh

TV = 1 x 80 = 80 Watts --- in 1 hr consumption = 80x1 = 80 Wh

STB = 1 x 25 = 25 Watts --- in 1 hr consumption = 25x1 = 25 Wh

Mixer = 1 x 700 = 700 Watts -- in 30 mins consumption = 700x0.5 = 350 Wh

Router = 2 x 5 = 10 Watts -- in 6 hrs consumption = 10x6 = 60 Wh

Total Wattage = 1250 and Total Consumption = 2255 Wh or 2.255 units.

So VA value needed = 1250/0.7 = 1785 ... so roughly about 2 kVA. So you need a 2 kVA inverter. Usually 2 kVA inverters are 24V inverters, So you will have to go for two batteries. A 2kVA inverter with two numbers of 110 Ah or 135 Ah batteries should work great for you. You can look at Sukam, Luminous or Microtek inverters.

hi, my leb bulbs are dying when running on inverter, i have already changed 3 led bulbs in 2 months. what should i do?

Which inverter do you have? Is it a square wave inverter or pure sine wave inverter? In general inverters with bad harmonics can damage some appliances.

its sukam falcom pure sine wave inverter. 4 years old and makes a lot of noise too.

You should put a complaint with Sukam. Pure Sine wave inverters do not have bad harmonics and thus it should not harm the LED bulbs at all.

I would like to have a good inverter in low price. Please help me.

I WANT TO REPLACE MY 150 PLUS EXIDE BATTERY WITH THE NEW ONE. WHAT WOULD BE THE COST OF THE NEW ONE AND HOW MUCH WOULD I GET REFUND FROM THE OLD ONE WHICH IS 3 YRS OLD BUT IN WORKING CONDITION. I AM RESIDING IN PANVEL SO KINDLY ADVICE THEPROPER PRODUCT AND BRAND THE PERFECT DEALER OR SUPPLIER. CONT NO 9819036124

You will have to contact a dealer to get this information. We do not have it.

Am very grateful for such wonderful piece of information. I would like you to advise me on the type of inverter capacity and battery for the following:

1. 10 bulbs LED

2. 4 ceiling fans

3. 2 LED 49'' TVs

4. 1 lap top

5. 2 mobile Phones

how much can I buy such an inverter and battery in $, US DOLLAS?

Hi Addison,

Here is your calculation:

1) LED Bulbs = 10 x 15 = 150 watts (assuming 15 W LED bulbs)

2) Ceiling Fans = 4 x 90 = 360 watts

3) TVs = 2 x 80 = 160 watts

4) Laptop = 1 x 60 = 60 watts

5) Phones = 2 x 5 = 10 watts.

Total would be 740 watts. Which means VA value would be 740/0.7 = about 1050 VA.

Now assuming 70% of the appliances are used at any given moment, the wattage would be 740 x 0.7 = 518 watts (approx 500 watts).

Which means in 8 hours the consumption would be 500 x 8 = 4000 Wh or 4 units of electricity.

Usually a 200 Ah battery can store about 2 units of electricity so you need two number of 200 Ah batteries.

So you would need a 24V inverter (12V + 12V for each battery connected in series).

We do not have data of the US market (this website is primarily focused on Indian audience), so I will not be able to give you the costs. But I hope you get the idea on the capacities using this information.

FOR 8 hours duration

Thanks for the immediate response.

I also selected luminous 1100 zelio, could you share your thought on zelio 1700?

Also, which company battery should I consider Aamron, Exide or luminous itself.

Thanks

You will get better warranty and service if you go for Luminous itself. However, as a battery brand I think Exide and Amaron are better. But Luminous is not bad. You will get a better deal if you go for Luminous.

Hi Abhishek,

Thanks for the article. Please recommend me the inventor and battery for following consumption:

5 fan

10 cfl or led bulb 15 watt each

1 tv

1 setup box

2 charger

Here is your calculation

Fan = 5 x 90 = 450 watts

CFLs = 10 x 15 = 150 watts

Tv = 1 x 120 = 120 watts (assuming CRT)

STB = 1 x 25 = 25 watts (assuming HD DVR)

Charger = 2 x 5 = 10 watts (assuming mobile phone charger)

Total = 450 + 150 + 120 + 25 + 10 = 755 watts.

Assuming only 70% of it is on at any given time, running watts = 755 * 0.7 = 528 watts.

VA value needed = 755/0.7 = about 1100 VA.

So a 1100 VA inverter with a 180 Ah battery should give you 3 hrs backup. You can check these:

Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zazl4TuuuN )

Microtek UPS SEBz 1100 VA (1.1 KVA) Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zas6WTuuuN )

Luminous LZ1100SW Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/ZUlAbTuuuN )

With a 180 Ah battery.

Hi Abhishek,

Let me thank you first, for this very well written article. Using your method, I calculated my power-needs to be ~230Ah. I found some options.

1. Luminous offers a combo of Zelio 1100 + ILTT 26060 220 Ah battery for Rs. 24300.

2. APC Home UPS (850VA, Sine Wave Output BI850SINE-IN) + a suitable battery.

Which one would you prefer? Also, please suggest the best tubular battery available in the 220-230 Ah range.

I think the Luminous combo of Zelio + luminous battery would be the best for you. In general feedback on Zelio is quite good.

Thanks for the quick reply.

Hi Abhishek

I have

5 fans(100watt each)

10 CFL bulbs (10watt each)

5 led bulbs (5 watt each)

1 laptop

10 Smartphone

Please suggest me which inverter and battery should I buy if I want 3 hrs backup.

Thanks

Here is your calculation

Fans = 5 x 100 = 500 watts

CFLs = 10 x 10 = 100 watts

LED = 5 x 5 = 25 watts

Laptop = 1 x 60 = 60 watts

Phones = 10 x 5 = 50 watts

Total = 735 watts. Assuming you only use 70% of it at any time, then wattage would be 735 x 0.7 = 514 watts. So in 3 hours you will use about 1.5 (a little more) units. So a 180 Ah battery would be good. And VA value needed = 735/0.7 = 1050 VA.

So a 1100 VA inverter with a 180 Ah battery should be good for your use. You can look at any of these:

Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zazl4TuuuN )

Microtek UPS SEBz 1100 VA (1.1 KVA) Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/Zas6WTuuuN )

Luminous LZ1100SW Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/ZUlAbTuuuN )

Hi Abhishek,

First thank yo so much for such valuable information. I'm planning to installed inverter for my home. my requrement are as below,

2 Fans

2 Tube lights

2 LED lights (7 wats each)

1 LCD TV 32 inch

1 setup box

1 wifi router

1 mobile charging point

Please suggest inverter and battery for my requirements. Also, i need to know whether there any need to change the wiring in my home.

Thanks in advance.

Here is your calculation:

2 Fans = 2 x 90 = 180 watts

2 TLs = 2 x 50 = 100 watts

2 LEDs = 2 x 7 = 14 watts

1 LCD TV = 1 x 50 = 50 watts

1 STB = 1 x 25 = 25 watts

1 Wifi = 1 x 5 = 5 watts

1 Mobile = 1 x 5 = 5 watts

Total = 180 + 100 + 14 + 50 + 25 + 5 + 5 = 379 watts.

VA value needed = 379/0.7= 541 VA.

A 150 Ah battery can store 1.5 units of electricity or 1500 Watt-hour of electricity. And you will get a backup of 1500/379 = about 3.9 hr of anywhere between 3-4 hrs.

So you can go for 600-650 VA inverter with 150 Ah battery.

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 )

with a 150 Ah battery and you can get 3-4 hrs backup.

Hi Abhishek,

Pls suggest me inverter and battery for home use for my below requirements.

Ceiling Fans - 4 nos

CFL / LED bulbs - 5 nos.

Backup required is for 8-10 hrs.

Also tell me the amount to be spent for the same.

(obviously considering best possible company & reasonable price).

Here is your calculation:

4 Fans = 4 x 90 = 360 watts

Bulbs = 5 x 15 = 75

Total would be about 435-450 watts. Assuming only 70% of the appliances are on at any given time the wattage would be 450*0.7=315 watts. In 10 hours that would be 315x10 = 3.15 units. So roughly 3 units should give you 8-10 hrs backup. So you need two 150 Ah batteries for the same. And thus a 24V inverter is needed. 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

The cost of the inverter would be about Rs 7000 or so. And the cheapest that you can get a good battery would be about Rs 9000-10000. So the total system would cost about Rs 27000.

Hi abhishek,

Pls suggest me inverter and battery for my below requirements.

Fan-3

Cooler-3

CFL-3

TV-1

Here is your calculation

Fan = 3 x 90 = 270 watts

Cooler = 3 x 300 = 900 watts

CFL = 3 x 23 = 69 watts

TV = 1 x 120 = 120 watts (assuming CRT TV)

So total = 270 + 900 + 69 + 120 = 1359 watts, so VA needed = 1359/0.7 = 1941 or about 2 kVA. Typically 2 kVA inverters are 24V inverters, so you will need 2 batteries wit it.

1359 watts in 3 hours would consume = 1359 x 3 = 4077 Wh or 4.077 units. So you will need two numbers of 200 Ah batteries.

Now a 2 kVA inverter and two 200 Ah batteries would be really costly and if power cuts are not frequent then I think it is not wise to invest that much.

Frankly I would suggest you to remove those coolers (may be two of them) and then the system size will come down significantly and it would be far more reasonable.

Power Cuts are not very frequent hence a backup of 3 hrs is sufficient

Thanks for the information. I have an old microtek UPS EB 600. Need a battery options to run laptop with internet , wifi router for 6 to 8 hrs along with 2 lights and 2 fan. Please suggest.

With 600VA inverter the biggest battery that you can get would be about 150AH. And that can store 1.5 units of electricity. Your wattage would be 60 (Laptop) + 5 (WiFi) + 100 (2 Tubelights) + 180 (Fans) = 345 watts. And 345 watts in 4 hours would need 345x4=1380 Wh or 1.38 units. So if you want 8 hours backup, then you will have to go for a bigger inverter (mostly for one that can support 2 batteries or 24V).

Hi sir 3fans 5led lights witch voltage inverter best in low price ,, and what company inverter best

3 fans = 3 x 90 = 270 watts

5 LED lights = 5 x 15 = 75 watts.

Your total wattage would be about 350 watts. Which means the VA needed = 350/0.7 = 500 VA. If you are looking for a cheaper one but still good, then you can look at Luminous Eco Watt Square Wave 650VA I Square Wave Inverter (Flipkart Link: http://fkrt.it/~OJZs!NNNN )

i have required a good inverter and batteries from home

which company are best

8 tube

4 fans

1 led tv

1 freez

Your calculation:

8 TL = 8 x 50 = 400 watts

4 Fan = 4 x 90 = 360 watts

1 TV = 1 x 80 = 80 watts

1 Fridge = 375 watts.

Total = 1215 watts, so VA value needed = 1735. But just because you have a fridge, it would be better to go for 2-2.5 kVA inverter. Which will be 36 V inverter, so you will need 3 batteries. Sukam, Luminous, Microtek are some of the best inverter brands.

I have a load of 2kv,I also have a 800va inverter which tubler battery require to change shortly.I am interested to install solar plant at my roof.

Can u guide me for better idea,am I change my battery or install solar power.

If solar power than what will be the cost as per my need.

Do you have lot of power cuts in your are or not much? I am asking this because if there are power cuts then off grid system would be better. But if there are not a lot of power cuts, then grid connected solar would be better. And the costs vary as off grid needs batteries, whereas grid connected does not need batteries.

Hello Abhishek,

I need to pick up an inverter to run my home/Office. Please suggest a good inverter with the following requirements:

- 4 Laptops

- 1 wifi router

- 4 Tube Lights

- 2 Fans

- 1 Fridge

- 1 LED TV

Here is your calculation:

laptops = 4 x 60 = 240 watts

Wifi = 1 x 5 = 5 watts

TLs = 4 x 50 = 200 watts

Fans = 2 x 90 = 180 watts

Fridge = 1 x 375 = 375 watts

TV = 1 x 80 = 80 watts

Total = 1080 watts. Which means VA value would be about 1400-1500 VA. If you go for an inverter that can handle the startup current for the fridge then 1400 VA would be good enough. If the inverter cannot handle startup current then you will have to go for 2.5 kVA (because fridge will need 3-4 time more current to start unless it is an inverter technology fridge). You can look at Sukam Falcon+ 1600 VA inverter. It can handle the startup current as well. However, it will be a 24V inverter, so you will have to go for two batteries. Two 150 Ah batteries can give you upto 3-4 hrs of backup.

What if we exclude the Fridge from this, will a 1200 VA suffice?

Also, what kind of batteries would I need to purchase.

Thank you so much for your help.

f your remove fridge, then even 1000 VA would suffice. 1200 VA would be more than enough. It will be better if you purchase tubular or tall tubular batteries with it.

Hello sir , I wanted to buy an inverter for my home to run 5 fans 5 led 1 tv and a mixer grinder during power cuts , so suggest me a good inverter. Thank you

Here is your calculation:

Fans = 5 x 90 = 450 watts

LED = 5 x 15 = 75 watts

TV = 1 x 120 = 120 watts (assuming CRT TV)

Mixer = 1 x 700 = 700 watts.

Total would be 1345 Watts or about 2 kVA. A 2 kVA inverter would be 24V. So you will need two batteries. Two batteries of 150 Ah can store about 3 units of electricity or 3000 Wh of electricity. Now I think your mixer grinder will not work all the time. The rest of the things would be 650 watts. Or to be conservative let us assume 600 watts. Then 600 W in 5 hrs would consume 600x5 = 3000 Wh. So a 2 kVA inverter with two 150Ah batteries can give about 4-5 hrs of backup for you. You can go for Luminous Cruz 2kVA inverter with two batteries of 150 Ah.

Hi. I am planning of buying an inverter and a battery for my home appliance,i have the following

Fan -2

Tubelight - 2

CRT Tv-1

Laptop-1

what capacity of inverter and battery do i need to buy if i will use it for 8 hours.and what brand will u advice me to buy.Thank you mr Abhishek. waiting for you reply.

Here is the calculation:

Fan = 2 x 90 = 180 watts

TL = 2 x 50 = 100 watts

CRT = 1 x 120 = 120 watts

Laptop = 1 x 60 = 60 watts.

Total = 460 watts. For 8 hours you would need 460 x 8 = 3680 Wh or 3.68 units. So you will have to go for two numbers of 200 Ah batteries. And thus a 24V inverter. You can look at these:

Luminous Zelio 1700 (Zelio is one of their most popular range)

Microtek UPS SEBZ 1500 VA

And two 200 Ah batteries along with this.

Hi, Will the wi-fi router remain ON while using a pure sine wave inverter. My most important need is to have my internet running while the power goes down. I am thinking of Computer UPS but instead can spend some more and get entire lights in home. Please advise.

The switching time of inverters is almost instantaneous these days. Your Wi-Fi should remain ON.

Hi. I am planning of buying an inverter and a battery for my home appliance,i have the following

fan -3

TL - 5

tv-1

refridgerator-1

laptop-1

desk top computer-1

home theatre system-1

what capacity of inverter and battery do i need to buy if i will use it for 6 or 8 hours.and what brand will u advice me to buy.Thank you mr Abhishek ,counting on you.

Here is you calculation:

3 Fans - 3 x 90 = 270 watts

5 TLs. - 5 x 50 = 250 watts

1 TV - 1 x 120 = 120 watts (assuming CRT TV)

1 Fridge - 1 x 375 = 375 watts (but its starting current will be very high).

1 Comp - 1 x 150 = 150 watts

1 Home Theatre - 1 x 150 = 150 watts

Total would be 1315 watts so about 1900 VA. But then for 8 hours the system would consume about 8 units of electricity. So you will need a 4 battery system or a 48 V system. Usually that would be a 2.5-3.5 kVA system. You can look at:

Su-kam Fusion Series Pure Sine Wave Commercial UPS (2.5-3.5 kVA)

Luminous Cruz 3.5 kVA/48V inverter.

This has to be along with 4 numbers of 200 Ah batteries.

Is amaron 165 ah battery a good choice with microtech Inverter 1.1k...what should be the cost for same

165 Ah battery can easily work with 1.1 kVA inverter. I am not sure about the costs.

Hii...

First of all thanks for ur valuable information.

I have an old microtek 810va inverter.( I think 2008 or 2009 model)

I wanted to run approx 400-450 watt load for 4-5 hours of backup. So A seller suggest me for Eastman 230Ah battery

1) Does microtek 810va support 230Ah battery if yes what will be charging time?

2) Can 230ah battery and 810va inverter combo is capable to take that loads?

3) Seller is saying Eastman is the company who is the manufacturer of luminous batteries. I saw on the luminous battery box saying manufactured by Eastman. Whats about the Eastman battery? Should I go for it or buy luminous 220Ah? Luminous 220Ah cost is about ₹19000 and Eastman 230Ah cost is about ₹16500. what will u suggest?

Thanks Again

Hi Wasi,

Here is my response:

1) Inverter can certainly support 230 Ah battery but then the charging time would be high. You will have to check the manual to see its charging current. Ususaly for 800 VA inverter the charging current would be about 10-12 Amp, which means the charging time would be about 230/10 or 23 hrs or 230/12 about 20 hrs.

2) Load taking capacity depends on inverter, not on the battery. Battery stores electricity and it has nothing to do with load.

3) I have not heard much of Eastman battery. So it would be difficult for me to comment.

Hello Abhishek,

First up, congratulations on a wonderfully well written article truly benefiting countless people like me in making an informed choice when it comes to a UPS/inverter solution for their homes.

I am looking for a UPS for my home & my requirement is a 6-hour back-up assuming the following applicances:

3 x TL

3 x fans

1 x LED TV

1 refrigerator (LG 290-Litres double door)

1 mixer-grinder

I had seen you mentioning in your article that with a refrigerator coming into the equation, at least a 2.5 KVA UPS unit would be required to take care of the start-up load, although the size of the battery would not increase. I have taken a few comparative quotes from vendors & most of them have considered a 2 KVA UPS with 2 x 150 AH or 3 x 150 AH or 2 x 200 AH batteries for my requirement stated above.

What would you recommend?

Would a 2-KVA UPS unit suffice for my requirement or should I go for 2.5 KVA?

Would 2 x 150 AH battery configuration be good enough or should I look at 2 x 180 AH or 3 x 150 AH or 2 x 200 AH?

I would really appreciate your advise here.

Best regards,

Suneet

Hi Suneet,

Depends on a lot of things. Firstly if you have inverter technology refrigerator then there will be no surge current. Secondly, there are some (not a whole lot) inverters that can take 4-5 times more current than the rated current. So they can handle surge (e.g. Su-kam Falcon+). If you are going for an inverter that can handle surge then 2 kVA would also suffice.

Wattage of your appliances (other than Refrigerator and Mixer Grinder) is about 480 watts. Mixer Grinder would be 700 watts and Fridge would be about 375 watts. But then Fridge would consume about 2-3 units in a day (newer ones would be much less as well). So 2x200 Ah batteries can store about 4 units of electricity. Assuming 8 hrs backup, fridge would consume about 1-1.5 units. Mixer Grinder will be used quite less I assume. Let's say it consumes 0.5 units. Then you are left with 2 units, And for 480 watts, it can give 8 hours backup. So if you want 8 hours backup then 2x200 Ah would be better.

hello Abhishek

i want to run 1 ton inverter Ac on inverter to run for 24 hrs basis which is best to install on gird system or offgird system

For 24 hours running it is better that you go for on grid system.

Hello Abhishek,

Could you please suggest me exact capacity of inverter and battery to me with reasonable price.

As of now I'm using 30 LED bulb of 7W. 3 celling fan. 1 CRT TV.

Regards thank you

Here is your calculation:

30 LED Bulbs = 30 x 7 = 210 watts

3 Fans = 3 x 90 = 270 watts

CRT TV = 120 watts.

Total would be 600 watts. So VA value needed = 600/0.7 = about 850 VA. A battery of 180 Ah can give you 3 hours backup. You can look at these 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 )

EXIDE XTATIC850VA UPS Pure Sine Wave Inverter (Flipkar Link: http://fkrt.it/EroiJ!NNNN )

Along with this a 180 Ah.

You can also look at this combo from Luminous on Amazon: http://amzn.to/2p7LgEO .... it is quite decently priced, but a 150 Ah battery will give you slightly lesser backup (about 2 and half hours).

Hi, I need an inverter to support the following. the inverter needs to provide for a rock steady 220v pure sine wave as I need I to provide for a backup of atlas 6-8hrs with the following load.

An oxygen concentrator machine that draws 300w

3nos of 5 star rated Fans (Havells ES-50)

3nos of 9w LED Lamps Philips.

need to have a good and dependable system as the oxygen concentrator is used by a patient who is on 24x7 oxygen support. kindly help with your suggestions on the same.

Here is your calculation:

Oxygen Concentrator - 300 watts

3 Fans - 3 x 55 = 165 watts

3 lights = 3 x 9 = 27 watts.

Total would be 492 watts. And for 8 hours you would need 500 x 8 = 4000 Wh of energy. So you need two 200 Ah batteries. I would suggest that you go for a Sukam Falcon + 1600 VA/24V inverter with two 200 Ah or 220 Ah batteries.That should give you about 8 hours of backup.

Hi Abhishek

My requirements - Fans (3), Tubelight (3), CFL (3), LED TV 42” (1), Set top box, Wi-Fi router, mobile phone chargers, etc. (4).

Require 8 hours backup of 6 hours

Kindly suggest best battery n inverter.

Also request your suggestion on SCOTT batteries for house inverter.

Thank you

Here is your calculation:

Fans = 3 x 90 = 270 watts

TL = 3 x 50 = 150 watts

CFLs = 3 x 23 = 69 watts

TV = 1 x 80 = 80 watts

STB = 20 watts

Wi Fi Router = 5 watts

Phone Charger = 5 watts

Total would be about 600 watts. Assuming only 70% of the appliances are running at any given time, instantaneous wattage would be 420 watts. For 8 hours back up you need 420x8 = 3360 Wh or 3.36 units backup. And for 6 hours you need 420x6 = 2520 Wh or 2.52 units.

A 150 Ah battery can store 1.5 units and 180 Ah can store about 1.8 units. So you would have to go for a two battery 24V system.

A 1400 VA/24V inverter with two 150 Ah batteries can give about 7 hours backup. So you can go with:

Luminous Zelio 1700 (Zelio is one of their most popular range)

Microtek UPS SEBZ 1500 VA

And two 150 Ah batteries along with this.