Electricity Saving Tips For Homes And Offices

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

By on November 17, 2017

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.


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.

Inverter Battery Calculator

Based on the calculations given above, we have prepared a calculator that you can use to calculate your inverter requirements. This calculator can also help you calculate Off-Grid Solar Panel requirements. To use it just use the steps mentioned below:

  1. Add all the appliances that you have in the calculator. You can always change the wattage if you know it is different from what is mentioned in the calculator. You can use the “Add Appliance” button at the bottom to keep adding more appliances. To remove an appliance, press the “X” at the end of each row.
  2. The list of appliances in the calculator is based on some of the most common appliances that we get queries on. If you do not find your appliance in the list, you can select “Custom” at the end and add your own appliance.
  3. Make sure that in “Hours” field you put the actual number of hours an appliance will run on battery backup.
  4. Press the “Calculate” button at bottom to get the calculation. Do tick the “Calculate Solar Panel Requirement” checkbox if you want to do calculations for Solar Panels.
  5. You can also print the output if you want.
  6. Please note that this calculator is good for a regular home setup or for a small requirement. It will not work well for big commercial or industrial setups.

Inverter Battery Calculator
Total Watts
Usage Hours
Total Wh

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.


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.

Related Articles

The short URL of the present article is: http://bgli.in/lIkgS

Please use the commenting form below to ask any questions or to make a comment. Please do not put the same comment multiple times. Your comment will appear after some time. Also please note that we do not reply to emails or comments on social media. So if you have any question, please put it in the form below and we will try to reply to it as soon as possible. If you are asking for an appliance recommendation, please be as specific with your requirements as possible because vague questions like asking for "cheap and best" would get vague replies.

अगर आप के कुछ भी सवाल हैं, वह आप नीचे दिए हुए सवाल-जवाब सेक्शन में पूछ सकते हैं। आप अपने सवाल हिंदी में भी पूछ सकते हैं और हम आपको हिंदी में ही जवाब देंगे। कृपया एक ही सवाल को बार बार ना डालें। आप एक बार जब "submit " बटन दबाएंगे, उसके बाद आपका सवाल यहाँ दिखने में थोड़ा टाइम लगेगा। कृपया धैर्य रखें। अगर हमारे पास आपके सवाल का जवाब है तो हम उसे जल्दी से जल्दी जवाब देने की कोशिश करेंगे। कृपया अपने सवाल ई मेल या सोशल मीडिया पर ना डालें।

Add comment

E-mail is already registered on the site. Please use the Login form or enter another.

You entered an incorrect username or password

Sorry, you must be logged in to post a comment.


by Newest
by Best by Newest by Oldest

1000 va solar inverter par kitni battery ya kitne ah maximum laga sakte hai

Abhishek Jain (Mod)

ek battery 200 Ah tak.


Dear Abhishek,

Can you suggest some good invrter & battery for the below load of 6 hrs of operation pls.
Fan 2
Tubelight 3
Laptop 1
Wifi 1
Mobile Phone Charging 1
Large TV + STB 1



Abhishek Jain (Mod)

Hi Nirmal,

You can always use the Inverter Battery sizing calculator on this page to do the sizing. It is available on this link: http://bgli.in/lIkgS#Inverter_Battery_Calculator ..... It will be quicker.

By the way you need a 1400 VA inverter with 2 numbers of 180 Ah batteries. 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

And two 180 Ah batteries along with this (same as the inverter brand or exide/amaron).



I have a Sukam falcon sine wave 1000va inverter. Currently I am using Sonic 1500 battery with it which recently died out and is unable to give charging. Not to forget to mention that The inverter is currently in warranty.

Kindly suggest me a similar battery for this inverter. I am living in Delhi and light goes over a week max.

I will be using it to run 2 tubelight, 3 fans and led TV for max 2 hrs.

Please suggest battery which will last long, economical, easily available and will be having good warranty.

Abhishek Jain (Mod)

You can go for Amaron 150 Ah tall tubular battery (Amazon Link: http://amzn.to/2o4EKva )


Hi, I used the calculator and found that i need a 200Ah Battery and 900Va Inverter. I stay in a rented house. Can you suggest better suitable things for me?

I am looking for something easy to plugin and maintain as I may need to change home frequently -yearly once

Abhishek Jain (Mod)

Hi Murali,

You can look at these:

Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/7cukn!NNNN )
Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/J!AxMTuuuN )
Microtek UPS SEBz 900 VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/zka5pTuuuN )

Along with this a 200 Ah battery (same brand or Exide/Amaron). If you go for same brand then it will be easier to maintain. And in such case, Luminous would be a good choice.


I need inverter with battery for home my electronic appliances is
1 room air cooler
3 led bulb
2 fan
1mobile charger

Abhishek Jain (Mod)

Hi Shailendra,

The sizing of inverter depends on the number of hours you will use the appliances. Without that nothing can be said. I would suggest that you use the calculator on this page to do the right sizing. Once you have the sizing, let me know and I can suggest some models.


I need a basic one for Home which can run below :
3 - 4 Tubelights
1 Cooler
3 - 4 FANS
Ps advise which inverter and battery is the best to buy for Home and helps in Bijli Bachao ...
Thanks in Advance....

Abhishek Jain (Mod)

Hi Neha,

To analyze the size, number of running hours of each appliance is also needed. I would suggest that you use the calculator on this page. You can input your requirements in it and it will suggest you the right size that you need. Once you know the size then reply that to me and I can suggest you some models.


Hi, my concern is to start 1hp water motor for an hour if electricity is not available. Calculator shown me 1600va inverter, and 2kva inverter if i added some more appliances. I find luminous cruz 2kva size is bigger where I want to place inverter so I am not preferring it. Do you suggest me if i can move ahead with Microtek JM SW 2000VA inverter or Luminous zelio 1700va inverter.

Abhishek Jain (Mod)

Hi Vicky,

If you need 2kVA, then I would not suggest you to go for 1700 VA inverter. It will be better if you go for 2KVA. You can go for Microtek JM SW 2000VA. Microtek is also one of the leading brands.


Another doubt, I have 150ah exide tubular battery with existing 900va inverter, Microtek JMSW2000 is 2 batteries system, will I be able to use my existing battery along with 1 new battery? If yes, then new battery should be bought of same 150ah size and same model or there can be variation.

Abhishek Jain (Mod)

Ideally, you should not mix different size batteries or old/new batteries. If you have two batteries 120 Ah and 150Ah, then your effective output from both the batteries will be 120 Ah (you will waste the extra storage that is there in the other battery). Similarly, when batteries get old, their storage capacity decreases. So if you mix and old with new, then your effective output will be driven by the old one and not the new one. So it is not that you cannot use your old battery or mix two different sizes, but then it will be better if you go for two new batteries of the same size.


Even guide me if I should prefer some other inverter like microtek SEBZ 1600va or any other.

Abhishek Jain (Mod)

I think Microtek would be good if you want a small inverter. Luminous Cruz and Sukam Fusion are big in size.


Hi Abhishek,
I am using microtek sw1600 old model UPS with 2 exide IT500 150AH batteries.Now i would like to replace the batteries with IT500 gelmagic batteries.But the seller said microtek is not compatible with exide gelbattery and due to over charging current the battery may get bulge and fail and exide will not provide the replacement.Is it true?.If so i would to go with IT500lead acid 150ah modelagain.Please advise.

Abhishek Jain (Mod)

Gel battery is also called maintenance-free battery and it is sensitive to overcharging and surrounding temperature. I would suggest you go for a tubular lead acid battery which also gives the same life. Nowadays, manufacturers give good warranty for a battery and you may check the same before buying it.


Usage 3 fans 4 led bulbs for 5hrs 1 exhaust fan and mobile charging........calculator says 700 va inverter and 150 ah battery can u suggest me a good 700 va inverter and 150 ah battery....

Abhishek Jain (Mod)

You can check 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 150 Ah (same brand as inverter or exide/amaron tubular battery). You will get better warranty and service if you go for same brand battery+inverter. However, you can get best inverter + best battery if you go for different brand inverter & battery.


My usage is 7 computer
4 tubelight
4 ceiling fan

Abhishek Jain (Mod)

Hi Shoeb,

We have put a calculator on this page to do the calculation. You can get it over here on this link: https://www.bijlibachao.com/appliances/choose-right-inverter-ups-for-home-and-maintain-it-right-to-manage-electricity-bills.html#Inverter_Battery_Calculator

You can use that to calculate the right sizing requirement for your inverter.


Backup I need is 4 to 5 hours


Hello sir, please help me get the actual Inverter and Battery requirements with safer specifications.

Total watts using calculator is coming to 1050. We need the backup for 4 hours.

Abhishek Jain (Mod)

Hello Mr Naidu,

The calculator would have recommended you the VA value as well as battery AH and battery numbers as well. That will be the specification required. What was the VA value that you got from the calculator? And the AH value and number of batteries?


Hi Jain,

I got the details as below,

2 Batteries of 220 Ah each Required.
2000 VA Inverter required.

Could you please recommend any particular Inverter and Battery for purchasing, may be two specific models?

Also, I'd like to know

1) How should these be maintained for long life?
2) Is it not safe when around Children/Infants?
3) Is it okay to keep them inside the house or outside?
4) Can these be stolen easily?

Abhishek Jain (Mod)

Here is my response:

You can look at these inverters:

Luminous Cruz 2kVA inverter
Su-kam Fusion 2.2 kVA inverter

And you can go for a similar brand battery or battery from Exide/Amaron.

1) Better go for same brand battery/inverter as with that you will get regular maintenance from the brand and regular maintenance can get you long life on battery. Try looking for longer warranty.

2) Better keep children/infants away from it.

3) There are some fumes from the battery, and thus it is better to keep it in a place that is well ventilated.

4) Yes they can be stolen if you leave them in open.


Thanks Jain. Again, a question on Battery,

I see most of the batteries with Capacity 150 Ah. But, for our requirement, it's suggested as 2 batteries of 220 Ah each. So, is it feasible to go for 3 batteries of 150 Ah each, keeping them connected in series?

Abhishek Jain (Mod)

To connect 3 batteries in series you need 3x12 = 36V inverter. Typically that would be a 2.5 kVA inverter. So you will end up increasing the inverter size for that. Not a big issue, but then overheads (in terms of electricity consumption) may increase a bit. But that would be minor. You can certainly go for a 36V inverter with three 150 Ah batteries. The cost may also increase.


Hello Admin,
There is a mistake in the concept of C-rating what you have tried to explain above. Let us take the example of what was explained earlier. A 1000mAh i.e 1Ah battery with C20 rating means we can use this 1Ah battery for 20 hours with an output current of 0.05A and not 20A. It can't have 20A from a 1Ah battery with the C20 rating. As a further example, let's say we have a 20Ah battery and we want the battery to discharge for 10 hours then the battery current would be 2A and for this the C-rate is C10.


Hi Admin

I am in need of 4FAN's and 4CFL Tubelights and looking for battery backup for 6 hours , Looking for some good inverter with less noise because I am in a situation to keep it in my living room. My considerations are like
Microtek Sebz 900VA and Luminous tubular 150ah / amaron CRTT150AH , I got a news that amaron is getting heat issues, kindly advise further

Abhishek Jain (Mod)

4 fans each of 90 watts in 6 hours would consume about 2160 Wh (you can use the calculator to check), 4 CFLs would be additional 552 Wh. So total would be about 2712 Wh which means you need at least 250-300 Ah batteries to support for 6 hours. A 150 Ah battery will just give 3 hrs support (if you use all of them together). It will go for 6 hours only if you use half of the appliances at any given time. If you use only half of it at any given time then 150 Ah battery will also be fine and 900 VA inverter will also be fine. But if you use more of it then you will need two batteries of 150 Ah and a bigger inverter (about 1400 VA to manage it). Microtek is a good brand and SEBZ is a good series. You can certainly go for it. Also Amaron is a good battery brand, there must have been some other issues because of which heating would be happening. In general I have not heard of such things.


Dear abhi,
Why am I getting noise while power off or power comes time from my luminous 150AH + luminous zelio+ Invertor? It comes like 'dub' whenever power gone and comes..Is any problem for my Invertor?


This is because of the dynamics the inverter has to handle whenever it gets switched on or off. Generally, it happens with every inverter you buy.

Abhishek Jain (Mod)

Hi Vijay,

I am not sure about it. You will have to get it checked by a Luminous service engineer.


I have a invertor 800 vA with battery 150....this invertor is in a where no one stays. now my question is we are unable to know whether main supply or invertor is on. If invertor is on we can switch off un wanted lights and fans..could you please let me know is there any possible way for us to know that invertor is on as some bell rings or suggest a solution

Abhishek Jain (Mod)

Hello Mr George,

Usually it is better to connect only those appliances to inverter that are desired to run when power cut happens. You can work with your electrician to remove the unwanted lights and fan permanently from the inverter. If you do not want to remove them, then additionally you can connect a small LED light in your setup which is connected directly to mains (bypassing the inverter). When power cut happens, the LED will stop glowing and you will get to know that the appliances are on inverter. Otherwise I cannot think of any other solution.


Below is my requirement with power back up required up to 6-7 hrs. Please advise me good inverter and battery, combo or without combo. I really appreciate your guidance.
5 no led bulb/ 4 no. Ceiling fan/ 43 inch led tv with STB/Mobil charger/ wifi router and lastly if possible for refrigerator of 330 Ltrs.

Abhishek Jain (Mod)

Hi Mathew,

Did you try using the calculator that we have put up on this page? It can help you do all the calculation. Now because you have not given exact time for which you will run each of these appliances. I will have to assume that each and every appliance will run for all of the time (7 hrs) and do the calculation accordingly. This calculation will be on higher side (bigger inverter battery which will be expensive as well). For better calculation you can use the calculator. From what you have provided using the calculator I have derived that you need a 1400 VA inverter with two 200 Ah batteries. 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

And two 200 Ah batteries along with this (same as the inverter brand or exide/amaron).


Thanks for your prompt reply..Below is the calculation I did after using Inverter battery calculator.
Inverter Battery Calculator - Bijlibachao.com
Appliance Count Watts Total Watts Usage Hours Total Wh
Fan 4 90 360 5 1800
LED Tubelight 5 20 100 4 400
Large TV + STB 1 140 140 3 420
Wifi 1 5 5 4 20
Mobile Phone Charging 1 5 5 3 15
Fridge (Inverter) 1 450 450 2 56
Your Total Requirement
Total Watts 1060
Total Wh 2711
Recommended Inverter & Battery Capacities
2 Batteries of 120 Ah each Required.
1400 VA Inverter required.
Please advise looking at my above requirement if below model is sufficient or good or suggest any other model..
Zelio 1700 + RC18000 150 Ah OR Cruze 2KVA + ILTT18048 150 Ah.

Abhishek Jain (Mod)

I think Zelio 1700 + RC18000 150 Ah would be good.


single 200AH battery better
or 2 batteries each of 100 AH

Abhishek Jain (Mod)

A single 200 Ah battery can be handled using a 12V inverter whereas 2 batteries of 100 Ah will need a 24V inverter for better and faster charging. The backup hours will be almost the same.


Hi Abhishek,

Above article is very useful, do we also have any suggestions/precautions on connectivity & in future if one need to go for solar then what we can consider with current setup.

Below is my requirement, what i need your suggestion on Inverter & Battery,

7 Led lights 15 w
1 TL 28w
3 Fans
wifi router
1 mixer (rarely required)
1 refrigerator


Abhishek Jain (Mod)

Hi Sachin,

Did you try using the calculator on this page to do the calculation? We have tried to make it quite handy and easy to do calculations for an inverter and solar panels using the same. I will not be able to suggest you anything without knowing the backup hours. The calculator will get you the right data (If you will provide me the data, I will also use the same to do the calculations).

If you plan to go for solar in future then you can consider going for a hybrid inverter (one that can charge on solar as well as the grid). If you get a good electrician, then he will take all the precautions for connectivity.


Hello sir,

I am planning on buying a 30kva inverter. My appliances will include a whole host of lights, 2 refrigerators, a deep freezer, a microwave oven, an electric cooker, and 3 air conditioner units.

Is it possible to buy say, 50 nr 200AH batteries to hook up to the inverter to power all these appliances? Does it work like this? Thank you!

Abhishek Jain (Mod)

Number of batteries that you can connect to an inverter will depend on the voltage of the inverter. Each battery is 12 V battery. To support 50 batteries either the inverter has to be 50x12 = 600 V inverter or 25x12 = 300 V inverter (in 300 V inverter you will have two parallel packs of 25 batteries to make 50 batteries). I am not sure if such a system is available in the market.


Hi sir, many thanks for your reply, which I truly appreciate. Is there any system out there that has the capacity to power A/C units? Can you kindly direct me to where I can look at such options? Thank you and God bless you sir.

Abhishek Jain (Mod)

In general DG Sets are better to run air conditioners. Inverters will not be good if you want to run so many appliances and ACs.


Sir I have 8 250w 24v solar panels for which I am looking for inverter , and all companies are providing me 48v for these panels which will reduce it to I kw when I connect them in parallel in four sets of two panels in series to make them 48v ,,, can u please tell me can I attach them to 2.5 kva 24v inverter all panels in parallel which will provide me 2kw 24 v from my panels


Hi Abhishek (Mod),

I am looking to replace my 5 years old home inverter system (Numeric digital HPH HR 1000 + Exide IT500 150 AH Tall Tubular) and is really confused with the no. of models available these days.

Sukam falcon + & Bazooka 150Ah Tubular Battery looks exciting but replacement warranty for battery is only 2 years and after sales service in Chennai looks doubtful. Price comes around 19500.

Any other Luminous, Exide or Microtek combo would suggest at that price ? Please advise.


Abhishek Jain (Mod)

Hi Karthik,

What is your VA requirement? Can you check your old inverter and tell me the VA load that it can take? Or you can do the calculations using the calculator on this page.


My old inverter is 1000 VA and 150 AH battery. It was giving me good back up but recent times there was a surge in my current bill due to faulty inverter or weak battery or low voltage at night but couldn't able to exactly narrow it down as either of the technician blame on each other so i have sold it for a decent price. My inclination is more towards faulty inverter.

Here the calculator rating shows 900 VA and 180 AH battery.

Please help me choosing the right inverter/battery.

Abhishek Jain (Mod)

Luminous Zelio 1100 is actually a 900 VA inverter.

Abhishek Jain (Mod)

Hi Karthik,

You can look at these:

Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/7cukn!NNNN )
Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/J!AxMTuuuN )
Microtek UPS SEBz 900 VA Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/zka5pTuuuN )

Along with this a 180 Ah battery (same brand or Exide/Amaron).


Hi Abhishek,

Please suggest an inverter for my house with below requirements for 4 Hours:
4 Tube lights
2 10w LED Bulb
2 fans
43" LED TV with HD Setup Box
2 Mobile charger
1 Water Purifier

Please can you suggest inverter from Luminous and Sukam brand (Pure Sine Wave) and with combo battery or seperate battery

Thanks for your help,

Abhishek Jain (Mod)

Here is your calculation:

AppliaceCountWattageTotal WattageHoursTotal Wh
LED Bulb21020480
TV + STB180804320
Water Purifier180804320
  Total570 2280

A 900 VA inverter with 180 Ah battery should be good enough for you. You can look at these:

A 900 VA system with 180 Ah battery should be good enough for your use. You can look at these:

Su-Kam SHINY 900VA/12V Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/7cukn!NNNN )
Luminous Zelio 1100 VA Sine Wave Home UPS Inverter Pure Sine Wave Inverter (Flipkart Link: http://fkrt.it/J!AxMTuuuN )

Along with this a 180 Ah battery (same brand or Exide/Amaron).


Thanks a lot



Hi Abhishek,
Based on my requirement, I have filtered above mentioned two Luninous UPS, but confused that what would be the best considering price difference of Rs. 9000 between these two. I want to store as much units of electricity in battery as possible in quick time since power cut is very frequent in our area, sometimes power cut is there for days.

Does Cruze model justify extra 9000 over Zelio model ? Or if you can suggest some other same spec UPS model !
Zelio 1700 charges battery at 17ah rate, can you confirm whats the value for Cruze 2KVA ?

Please let me understand the technical difference as well.


Abhishek Jain (Mod)

Hi Abhishek,

Because in both cases you have two 150 Ah batteries, the backup would be roughly the same. Also if you check the full battery charge time on both the links, you will see that the time is the same. So charging current will also be similar. The main difference is in the total load. One is 1700 VA and the other is 2000 VA (or 2 kVA). So the 2 kVA one can handle extra 300 VA or roughly 200 watts. So you can run an extra appliance of 200 watts with a 2 kVA inverter. That is the main technical difference that I can see. Other difference would be in features where the Cruz inverter will show some extra information about the battery health and charge as compared to Zelio. Another difference is in warranty on the batteries. The Cruz model has more warranty as compared to Zelio model.


Hi Abhishek,
Please suggest an inverter for my house with below requirements with backup for 3-4 hours:

2 Tube lights
2 LED bulbs - 10W
2 fans
40" LED TV with Setup Box
2 Laptops charging
2 phones charging
1 Modem
1 Water Purifier

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
LED Bulbs21020480
TV + STB180804320
Wtaer Purifier180804320
  Total595 2380

A 1100 VA inverter with 220 Ah battery should be good for you. You can look at these:

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 )

With a 220 Ah battery of same brand or Exide/Amaron.


Hi Abhishek,
Please suggest an inverter for my house with below requirements for 3 to 4 Hours:

2 Tube lights
2 LED bulbs - 10W
2 fans
40" LED TV with Setup Box
2 Laptops charging
2 phones charging
1 Modem
Water Purifier

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
LED Bulbs21020480
TV + STB180804320
Wtaer Purifier180804320
  Total595 2380

A 1100 VA inverter with 220 Ah battery should be good for you. You can look at these:

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 )

With a 220 Ah battery of same brand or Exide/Amaron.


Hi Abhishek,

Could you suggest an inverter for my house? The following are my requirements:

1. 10 LED bulbs - 10W
2. 3 fans
3. 55" LED TV with STB
4. 2 Laptops charging
5. 2 phones charging
6. 1 printer
7. 1 Playstation
8. 1 soundbar

Cost is not the most important criterion, but I would like my purchase to be maintenance free. Power cuts aren't frequent in my house. Also, I would like to go solar if possible, and do my bit for the environment! Any help would be appreciated. Thanks.

Abhishek Jain (Mod)

What is the backup in hours that you need for these appliances? Do you really need a backup for PlayStation and soundbar? They can be put on a separate connection to remain switched off when power is not there.



Sorry, should have mentioned the backup duration. Six hours should be sufficient. And regarding the PlayStation and soundbar, while they're not essentials I would like to provide for them, all else being the same.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
LED Bulbs10101006600
  Total915 5490

Assuming only 70% of your appliances are used at any given time, you would need roughly 3800 Wh or 3.8 units of electricity for 6 hrs. So you need two 200 Ah batteries to support it. And thus you will have to go for a 24 V inverter.

A 1400-1600 VA/24 V inverter with two 200 Ah batteries should be good to support 6 hrs. 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

And two 200 Ah batteries along with this (same as the inverter brand or exide/amaron).


Thanks a lot abhishek.

Just one further question, I also have an inverter ac. What would the calculation be if I added that and remove the printer and the PlayStation since both are quite heavy usage? Thanks again.

Abhishek Jain (Mod)

Hi Siddharth,

Inverter AC of 1 ton would be about 1000-1200 Watts (at peak) and a 1.5 ton would be about 1500-1700 Watts (at peak). You cannot remove printer and PlayStation and replace it with Inverter AC. Also, the wattage of printer depends on the size of the printer. The big ones consume about 80-100 Watts and that too when they are working. When it is not printing or working, it does not consume much (and that is why I have taken a factor of 70% to reduce total wh). But the Wattage would still increase the VA (or the inverter size). Similarly, PlayStation would consume that much when in use and not when it is just switched on. I think the biggest consumption will be from LED Lamps, Fans, TV and Laptop.

Poornashree Ashok

Would you be able to suggest me about the inverter size required for a dental compressor of 1hp and a dental chair ?
I would also require the back up for a few LED lights and 2 fans (wall fans)

Abhishek Jain (Mod)

What would be the wattage of the dental chair? Also how many LED lights? And how many hours of backup required?


Dental chair 24va
Compressor 1HP
LED lights about 10 and a LED sign board
fan 2 (wall fans )
Motorised suction unit that requires 240v

Abhishek Jain (Mod)

Do you have the VA value for Motorised Suction unit? 240V is standard on which every appliance operates. Also how many hours of backup do you need?


Just about half an hour
The VA of the compressor is 5.5 VA 220v that’s what is written on it

Abhishek Jain (Mod)

Based on whatever information you have provided, here is the calculation:

ApplianceCountWattageTotal WattageTotal VAHoursTotal VAh
Dental Chair1  240.512
LED Lights10121201710.585.5
LED Sign Board180801140.557
Wall Fans2601201710.585.5
Motorised Suction Unit1
   Total1556.5 778.25
     AH Required65

I just hope that you have verified the information because I am not aware of the power consumption of some of your appliances. The backup requirement you have is less, but the load (VA value) is high. You can go for a 1400-1600 VA single battery inverters with a 100 Ah battery and that should be good enough. Luminous 1650 Rapid Charge and Sukam Shiny 1600 VA inverter are couple of models that I know of. You can check them. Also you can either go for same brand battery or Exide/Amaron batteries of 100 Ah.


6 TL, 1fan, 1tv and 1mixer grinder for 6hrs.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
Mizxer Grinder17507500.5375
  Total1220 3195

You would need two batteries of 150 Ah to support this and thus you need 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

And two 150 Ah batteries along with this (same as the inverter brand or exide/amaron).


Hi, Abhi
I tried to calculate with above formula's but it's coming up with high numbers.
Could you please help me choose inverter or UPS for a small retail store
Back up needed for 4-6 hours
1/2 tube lights
1 ceiling fan
2 camera surveillance system (without monitor)


Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattsHours of UsageTotal Wh
  Total295 1770

A 900 VA system with 180 Ah battery should be good enough for your use. You can look at these:

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 battery (same brand or Exide/Amaron).


Hi abhi..
Is it possible to connect LG 6kg FH0H3NDNL02 / FH0B8NDL22 front load washing machine with Luminous Zelio 1100 + Luminous 150AH battery for cancel the working procedure to taken clothes out? I won't connect other appliances if I connect washing machine with inverter for cancel the washing procedure?

Abhishek Jain (Mod)

Your inverter can easily manage the washing machine. A washing machine is not a big load. It can handle other appliances as well along with the washing machine as long as the total load is not more than what it can handle.


Dear abhi..
LG 6kg front load washing machine 1700w but Luminous zelio 900VA only..Heavy rains time I usually get 10hours power cut in chennai..If power gone then washing machine can't open..If i won't open upto 10hours then clothes may torn easily because of extreme soaking..
You please consider 900VA luminous zelio 1100 can capable to use LG 6kg washing machine (1700w) or not..

Abhishek Jain (Mod)

Hi Vijay,

1700 W for washing machine is including the heater. If you do not use the heater, then the motor wattage would just be about 350 Watts. And that too it is inverter technology so it would not consume more than 350-380VA out of 900 VA. You will still be left with about 500-550 VA for other appliances (but this when you do not use a heater). If you use a heater and if it consumes 1700 Watts, then your 900 VA inverter will not be able to support it.


Dear abhi..
Thanks for your reply..Please tell how much VA for Luminous zelio 1100 model ups..Somewhere I'd seen 900VA.. Somewhere output 680VA like..Please tell the VA of Luminious zelio 1100..

Abhishek Jain (Mod)

Luminous Zelio 1100 is a 900 VA model.


Dear abhi..
Luminous zelio 1100 is a 900VA only but what is output 685watts? What I've to take while giving load on Invertor?

As you mentioned washing machine 350w to 380w will take..So we can give only 300w load only but you mentioned remaining 500 to 550VA like..
I've little confusing for this..Please rectify..Which we have to take for giving load? Either VA or output watts?

Abhishek Jain (Mod)

VA and watts are related by power factor (you can read more about PF on this link: https://www.bijlibachao.com/general-tips/what-is-power-factor-correction-and-how-mdi-maximum-demand-indicator-penalty-can-be-avoided.html )

Watts = PF x VA

Ideal PF is 1, but at home usually it is between 0.95 to 1 .... but appliances with motors have lesser power factor, so we assume 0.7 to be safe. So 900 VA is roughly 900x0.7 = 630 Watts .... now, this is an approximation. It will depend on the pf of your appliances.

Luminous has assumed a power factor of above 0.75 and that is why they have mentioned 685 watts. BUt it will depend on your appliance.

Washing Machine has a motor, so its power factor is usually less. But then the model you have purchased is one with inverter technology motor, which has far better power factor (above 0.9).

If you do not understand what is written above. Just believe me that your washing machine will work easily with your inverter if you do not use a heater.


Sure abhi..I believed you that's why I bought that washing machine and I'm going to take that Luminous combination of Invertor as your words..

I asked that bcz i just want to kNow about that..Anyhow thank you..


if load is 1kw so.howmuchVA set up of solar panel we instell

Abhishek Jain (Mod)

It will depend on number of hours of backup you need. 1 KW in 1 hour of use would consume 1 unit of electricity. A 1 kWp solar panel can produce 3-4 units a day.


Hi Abhishek,

Which inverter brand is better - Microtek, Su-kam or Luminous?
For around 1KVA and 4 hours backup approx, would you suggest Microtek UPS SWE2+ 1115, Microtek UPS Hybrid HB 1125, Luminous Zelio 1100+ or Su-kam Falcon+ 1100?
And which battery would be preferred? For budget purpose, I want to stick with single battery system.
We have power cuts of 10-15 min daily. Sometimes it goes for 1-4 hours.
Is it worth going for Tubular batteries or the normal? I noticed that there are tall tubular and short tubular. What is the difference?

Abhishek Jain (Mod)

By the way Tubular batteries are certainly better.

Abhishek Jain (Mod)

Luminous is the most popular brand among the customers, but I personally feel that Su-kam has the best technology. Su-kam does bring in a lot of good elements in their inverters. But Luminous is economical and thus more popular. I hope this statement will help you understand my personal preference (but then I usually leave it on to consumers to buy the brand they prefer).

Tall tubular batteries have longer backups (so they are 150 Ah and above). Short tubular batteries have lesser backups (they are max up to 150 Ah). And that is the difference. You will have to analyze your power needs to decide if you want to go for 100Ah or 120 Ah or 150 Ah or 200 Ah battery. Each 100 Ah stores roughly 1 unit of electricity (so a 150 Ah will store 1.5 unit and 200 Ah will store 2 units). A 100 Watt bulb when run for 10 hours consumes 100x10 = 1000 Wh or 1 unit of electricity. So a 100 Ah battery can support 100 Watt bulb for 10 hrs, a 150 Ah can support it for 15 hrs.


Thanks for clarifying on the battery and temperature compensation.

How does Microtek compare as a brand? Yes, Su-kam is more expensive but the battery covers 60-70% of the cost!

Between Su-kam's Falcon+, Falcon++ and Falcon HBU, which would be preferable? If Microtek is equal to Su-kam, which model?

My requirements are:
Watts Total Watts
Fans 4 75 300
Tubelights-led 2 20 40
Tubelights-cfl 2 40 80
cfl bulbs 5 15 75
LCD TV 1 80 80
Laptop 2 50 100
Total Load 675
Backup required 4 hours

Abhishek Jain (Mod)

I would still say Su-kam is better. Their Falcon series is really good and they are increasing features and naming them with extra +, so Falcon ++ is the latest range.

675 watts would be roughly 675/0.7 = ~960 VA. So a 900 VA to an 1100 VA inverter would be good enough. 675 watts in 4 hours would consume 675 x 4 = 2700 Wh or 2.7 units ... The biggest battery size that would be available in market would be 220 Ah which can store 2.2 units of electricity. I think a 220 Ah single battery should be able to cover almost 4 hours assuming you will not use every appliance all the time. So a 1100 VA inverter (because a bigger inverter has better charging current) with a 220 Ah battery should be good for you.


Also Su-kam has something called Automatic Temperature Compensation that they claim prolongs life of the battery. Is this correct?

Abhishek Jain (Mod)

It does help in prolonging the battery life. Su-kam inverters have good BMS (Battery management system) that help in effective charging of batteries so that their life is better.


Hi Abhi,
I need to buy inverter+Battery (mine is transferable job) for normal home needs 2 fans - 8 hrs, light 4- 8hrs which combination is best & 15-20 minutes mixer,laptop - 1 hr charging & mobile 30 minutes charging

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal WH
Mixer Grinder17507500.25187.5
  Total1195 3290

I think a 1400-1600 VA/ 24 V (2 battery system) would be good for you. 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

And two 150 Ah batteries along with this (same as the inverter brand or exide/amaron).


Hi Abhishek,
Please suggest inverter and battery for following :
2 fan 60 watt each for 6 hours
1 TV with STB 60 watt for 3 hours
6 CFL 15 watt each for 2 hours
2 Tube light 30 watt for 2 hours
2 Mobile Charging 5 watt each for 3 hours

Mine is a 2 BHK flat and power cut is minimal.
Is solar options are also available, please suggest with comparison.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
  Total340 1230

A 750 VA inverter with 120 Ah battery would be good enough for you. You can check 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 120 Ah (same brand as inverter or exide/amaron tubular battery). You can certainly get solar options, but I do not have comparison right now.


what is a difference of backup time/hours on a load of around 500 to 600 watts ,and charging time, when there is a power cut for six to eight times a day .....situation no 1 :with a luminous squarwave 1650 inverter (single battery system ,12 volts }connected with 2 tubular batteries 220ah each ,situation no 2 :a luminous squarewave 2250 inverter(double battery system,24 volts) connected with 2 tubular batteries 220 ah each ..

Abhishek Jain (Mod)

Which inverter models are you considering? Can you give the exact name? Because the time for a full charge will depend on the charging current mentioned in the specification of the model. Also how long is the power cut whenever it happens? 5 mins, 10 mins, 1 hr, 2 hr?


I am discussing abt two inverter models Luminous 1650 rapid charge single battery 12 v system,2 220 ah batteries connected to it ,and luminous square wave 2250 ,24 volts double battery system,2,220 ah batteries connected to it ....I assume that power cut may happen every 1 hr at least 5 times a day ..

Abhishek Jain (Mod)

Luminous 1650 rapid charge has a charging current of 17 Amp. It would need 220/17 = 12.94 hrs to charge a 220 Ah battery completely.

A 500 W system would run for 220*12/500 = about 5 hrs on a 220 Ah battery.

I am not able to find a Luminous Square Wave 2250 model. If you are talking about Luminous Pro UPS 2250 (which is a sine wave inverter), then it has a charging current of 20 Amps. So two 220 Ah battery will get charged in 220/20 = 11 hrs.

Total energy in two 220 Ah battery would be 2x220x12 and for 500 W, the backup would be for about 2x220x12 / 500 = about 10 hrs.


My 3 BHK flat has backup provided for one light point in every room by the society. On top of that I have a requirement to for 5 fans (3 Gorilla Atomberg and 2 normal ones), 1 40 inch LCD TV, 1 WiFi Router, 1 point to charge Mobile, 1 point to charge laptop, 1 Morphy Richards 1000watt food processor (on rare occasions) for 6 hours. I was thinking about going for Luminous Zelio 1700 Sine Wave. Is that the correct choice ? How much Ah battery would I requirer and which battery should I use ?

Abhishek Jain (Mod)

Battery can be same brand as inverter or exide/amaron battery.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
BLDC Fans330906540
Food Processor1100010000.25250
  Total1420 2770

You need to store about 3 units (3000 Wh) of electricity, so you should go for two 150 Ah batteries. So you should go for a 2 kVA inverter with two 150 Ah batteries. You can look at these:

Luminous Cruz 2kVA inverter
Su-kam Fusion 2.2 kVA inverter

with two 150 Ah battery. You can even go for Luminous Zelio 1700 ... but it is a 1500 VA inverter and you will have to switch off some appliances when you want to use your food processor.


My apartment society is already having common power backup facility but the backup is not hitless.It takes 30 seconds to 2 minutes for switching to power backup mode so routers, tv etc, goes off when main power supply goes off.I am already having an inverter( currently not installed) which I was using in my old apartment having no backup facility. Can I install the same in my current apartment flat already having the common power backup facility to have hitless power backup facility.? Is there any harm doing so? I heard it leads to reverse power signal.? Is it true... please guide.

Abhishek Jain (Mod)

I don't think there should be any problem. You get power supply from utitlity or DG, the inverter will not differentiate the source of power. So you can continue using the inverter.


Does bijli bachao have any information for RO, UV and etc water purifiers?

If have then please add the link here..

Abhishek Jain (Mod)

We have not done much research on those yet. They are certainly on our to do list. But with our current strength we have not been able to cover those. Hopefully we will cover them in future.


Hi abhishek,
I want to buy an inverter...
my requirement is 545 watt with backup for 6 hours...
plz suggest any good inverter...

Abhishek Jain (Mod)

545 watts for 6 hours means 545 x 6 = 3270 Wh or 3.2 units of electricity.... you would need two 150 Ah batteries (each can save 1.5 units) to support the same. And thus you would need a 12V + 12V (because each battery is 12V) = 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

And two 150 Ah batteries along with this (same as the inverter brand or exide/amaron).


Hi Abhishek,

I want your suggestion for buying an inverter and battery.
my requirement is 3 fans, 10 Led bulbs ,2 Cfl, 1 led tv which will be used for 6 hours.
please suggest 1 best choice, which I will buy.
thank you.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
LED Bulb10151506900
  Total546 3276

Based on the calculation you need about 2457 Wh or about 2.4 units of electricity. A 220 Ah battery can store 2.2 units of electricity. It is slightly less, but if you go for storage of more units then you will need a 2 battery system, which will not be worth it. I think a Luminous Rapid 1650/12 V Home UPS with a 220 Ah battery would be good for your needs.


Hi abhishek,
I have one confusion. I have heard that sine wave inverters are better than square waves. So if better technology is available in market ,Should I buy a square wave inverter?

Abhishek Jain (Mod)

Well Sine wave inverter are certainly better than square wave. But you need a 220 Ah battery (or may be slightly more). If you need more then you will have to go for two battery system because 220Ah is the biggest size that I know of. As per calculation you need to store 2.4 units of electricity, but a 220 Ah battery can store 2.2 units. So I avoided getting into two battery system by suggesting 220 Ah battery.

Now charging time of a battery depends on the charging current that an inverter can provide. Usually inverters have a charging current of 12-14 Amp which means that the total charging time for 220 Ah battery is 220/14 = 16 hrs or more. Luminous Rapid Charge is only inverter that is single battery and has charging current of 17 Amp. So the charging time would be 220/17 = 13 hrs.

Your VA requirement is not high. You can go for a 1100 VA inverter as well, which is pure sine wave. But then the charging time will be more. If the power cuts are not daily, then even that can work well. In that case you can look at these:

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 )


I don't need to use 2.4 units of electricity daily.It is for some emergency situation . As I live in RANCHI, I don't need to use fan in every month. I need long hours backup for fans for summer season. So now suggest some option

Abhishek Jain (Mod)

I already suggested you couple of Sine wave inverters in my previous message.


I've a small confusion..I'm going to buy Luminous zelio1100 with Luminous 150Ah (5years warranty)..

I'm getting 18,900 from my local small shop (100sq.ft)..It's just 500mtrs from my home..

I'm getting same item ₹ 18,800 from another shop(Big) which is 21km far away from my home..We can get this shop even in online also (Star inverters in chennai)..

Where can I buy? Both also having delivery option with free of cost..I'm staying in rental house only..I may will go anywhere anytime.. I'm getting confusion where to buy like.. Small shop person told 'they will provide service for small problems like'..If anything having big problem then I've to consult customer care like..This small shop person will get items from another dealer which is in chennai..

Please suggest what to do..

Abhishek Jain (Mod)

Hi Vijay,

I would say go with your gut feel (that is what I would have done in your situation). A shop that gives you the most confidence should be the one you should buy from. The difference in price is not much, but confidence in the shop is a must. I cannot sugegst you the one to pick because I personally have experience with none of them. Go with the one with which you have had better experience in the past.


Dear abhi,
I don't have any experience from those shops bcz i came newly..That small shops looks like servicing shop only..Their name is maruthi battery & computers & Aqua..I didn't see any new inverters in their shop..If we need then they'll provide it..

I identified another Big shop in online only..I just saw rating and called him..He told price of Invertor and he'll provide COD also.. They are maintaining a website (star inverters) also..If we type in google then we can see..

Abhishek Jain (Mod)

Hi Vijay,

I am sorry, I have experience with none of them. So it would be difficult for me to comment on their service. Luminous has its own online ecommerce shop. You may want to try them.


It's ok abhi..I'm a follower of your answers..I'm getting some knowledge from that..
I'm trying for washing machines and air conditioners from bijli bachao but I'm not able to see any questions and answers..I want to ask while buying a washing machine and air conditioner to my home but I don't have this option there..

Anyhow thanks..


Awesome.. Thank you abhi.. i understand your words..I also will contact to that Star Inverters (Big shop) and will ask about their service..After that I'll decide where to buy..

Thank you very much..


Hi Abhishek,

I want to buy an inverter.My energy requirement is 1.5kW. I asked a dealer,he has suggested me Luminous Tej 1075VA inverter ( RS 4200) with Luminous Tej24360(180 AH) battery(RS 15400).
Should I buy it ?
If you have some better option , please suggest me?
thank you.

Abhishek Jain (Mod)

If you have 1.5 kW and if you run it for 1 hour, it will consume 1.5 x 1 = 1.5 units of electricity and so a battery with 180 Ah size will at best give you 1 hr and 15-20 mins more backup.


I want 6 hours backup.

Abhishek Jain (Mod)

Hi Lakshya,

A 1.5 kW load in 6 hours would consume 1.5 x 6 = 9 units of electricity. A 150 Ah battery can store 1.5 units of electricity. So you need 6 such batteries for 6 hrs backup. And a 6 battery system is 12x6 = 72V system. Usually 6 battery systems are about 5 kVA systems. You need something like Luminous Cruz 5.2 kVA/72 V inverter with 6 batteries of 150 Ah.

Abhishek Jain (Mod)

Hi Lakshya,

If we compare Inverter system to a car, inverter is like engine and battery is like petrol tank .... usually when we do sizing we size for the battery as well ... and for that we need to know how long a backup (in hrs) do you need..... If you want to travel 100 kms and if you have petrol tank that can store as much as that can take you for 50 kms and if there is no petrol pump on the way ... you will be left stranded ... similarly when you do not have electricity if your battery does not support for all the hours, your system will come down ...

Also size of inverter depends on batteries as well .... because larger backup means you need larger or more batteries and for that you need bigger inverter. So I cannot suggest if this inverter will be good for you or not.


Hi Abhishek,

Can you suggest me with some options for inverter and battery for the below devices:
Device Number of device Watts Hours
Fan 6 90


Hi Abhishek,
Can you please suggest some option to me for inverter and batteries based on the below devices which will be used for 6 hours to 8 hour:
Device Watts number Total Wattage Hours
Fan 90 6 540 8
Tube light 28 6 168 6
Wifi 5 2 10 8

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal WH
  Total718 5408

You will need three numbers of 180 Ah batteries to store that much electricity. So you need a 36V inverter for it. 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 180 Ah tubular batteries with these (same brand as inverter or Exide/Amaron batteries).


Why luminous zelio 1100 shows 900VA and 530 watts like on backside sticker?
Please tell which is giving more watts between Luminous zelio 1100 and Microtek Sebz 1100?

Abhishek Jain (Mod)

Luminous Zelio 1100 is a 900 VA inverter while Microtek SEBZ 1100 is a 1100 VA inverter. So Microtek can handle more appliances.


Dear abhi,
I got confusion with your answer.. i asked a question yesterday.. you can see here..

Dear abhi,
I'm getting some combination of ups and battery with price list..Please choose which is good price?
1) Luminous zelio 1100 + Luminous 150Ah (2.5 y +1.5y warranty) = ₹ 17800
2) Luminous zelio 1100 + Luminous 150 Ah ( 3y + 2y) = ₹18800
3) Microtek sebz1100 VA = ₹4400 and Amaron 150Ah (3y +1y) = ₹12000 and Amaron 165Ah (3y +1y) =₹12500
Microtek Sebz1100 + Amaron 150Ah (3y+2y) = ₹ 16400
4) Microtek sebz1100 + Exide 150Ah (3y replacement) =₹17700
5) Microtek sebz1100 + Exide 150Ah (3.5y replacement) =₹ 19700
6) Microtek Sebz1100 + Exide 150Ah (4y replacement) =₹ 21900
7) Microtek Sebz1100 + Mtek 150Ah (2y) =₹ 14900
Please tell which combination is best for price and life?

I got reply for this as luminous zelio1100 + Luminous 150Ah(5years) warranty looks good like.. This reply shows Microtek Sebz 1100 good like.. which can i take for long life and price wise?


My home appliances 2fans for 9hours, 3 led 9w lights for 3 hours, 1 led 18w tube light for 2hours, 1 Led 40" TV for 1 or 2 hours, 1 exhaust fan for 3 hours, 1 Symphony 110w air cooler for 2 hours (It may won't use while power cut)..

I clearly told everything now so please tell the right combination for me..

Abhishek Jain (Mod)

Here is your calculation again:

ApplianceCountWattageTotal WattageHoursTotal Wh
LED TL11818236
LED Lights3927381
  Total490 2342

A 900 VA inverter will also work well for you. However, a 150 Ah battery would turn out to be a bit small. 180 Ah would be safer.


I told my appliances..
I've 2 doubts..
1) Does Luminous zelo 1100 enough for those appliances or not?

2) Does power consumption will take more if I use 165Ah/180Ah battery instead of 150Ah battery?

Abhishek Jain (Mod)

Here is my response:

1) Zelio 1100 will be enough for your appliances.

2) Imagine you have two vehicles, one that can store 25 lts of fuel other 35 lts fuel. Obviously mileage of the vechiles will be important, but then if we assume that the mileage is same, vehicle with 35 lts will take you more distance on full tank as compared to vehicle with 25 lts. But which one consumes more fuel? The answer will be the one with 35 lts. But is it bad? Well it depends on mileage.

Now in your case you have a 150 Ah battery and 180 Ah battery. Agreed efficiency of battery will be a factor, but 180 Ah will give you longer hours of backup while 150 Ah will give lesser backup. Because battery "STORES" electricity. SO which one stores more electricity? Obviously the one with 180Ah. So which one will consume more electricity? Obviously the 180 Ah one. But is it bad? Not really because it gives longer backup hours. Good or bad will depend on the efficiency or the mileage (in vechicle terminology). So larger fuel tanks is not bad, but lesser mileage is bad. And mileage depends on the design of the vehicle not on the capacity of the fuel tank.


Thank you abhi..
I asked about electricity because I'm paying ₹7/unit to my owner..I'm staying in chennai and power cut also not frequently.. It happens rarely..I'm buying invertor for safe side..If power gone then maximum 3 to 4 hours weekly only..Yearly once whole night power gone may happens..
Hope Luminous zelio1100 with Luminous 150Ah(3years+2years) may enough for me..

Abhishek Jain (Mod)

I think Luminous zelio1100 with Luminous 150Ah(3years+2years) should be good enough for you.

Abhishek Jain (Mod)

More VA does not mean that inverter is good. You need to check your needs to assess the VA you need. If you need 900 VA then Zelio is a very popular model.


My home appliances 2fans for 9hours, 3 led 9w lights for 3 hours, 1 led 18w tube light for 2hours, 1 Led 40" TV for 1 or 2 hours, 1 exhaust fan for 3 hours, 1 Symphony 110w air cooler for 2 hours (It may won't use while power cut)..
I clearly told everything now so please tell the right combination for me..


I've two doubts...

1) What is luminous inverlast and extracharge in 150Ah?

2) They are saling 60months and 48 months warranty batteries.. which is good between Luminous 150Ah 60 months (36m replacement+24m pro rate) battery and Luminous 150Ah 48months (36m replacement+12m pro rate)?

Abhishek Jain (Mod)

Extra charge is a deep cycle battery that can discharge more giving a slightly longer backup. But then deep cycle takes a toll on battery life, so they do not last as long as other normal batteries. Also they cannot take heavy instantaneous load. But with normal load, they can give longer backup. But Invertlast batteries will last longer as compared to Extracharge but will have slightly less backup (for same load).

I think the longer warranty one is better. So the battery with 60 months warranty will last longer.


If we pay more amount for getting pro rate period is good or not? Some batteries providing pro rate period 1 year and some batteries 2 years with ₹1000 to ₹1500 difference?

Abhishek Jain (Mod)

When they say 36m replacement + 24m pro rata warranty, it means that if there is any defect in the battery within 36 months, it will be replaced free of cost. And if it gets any defect in 24 months after the 3 years, you will have to pay prorated amount to get the battery replaced. So for e.g if it gets defect after 4 years, then you will have to pay half the price to get same battery. But if it has only 12m pro rata warranty then you will have to buy a completely new battery at 100% cost if it gets defect after 4 years.


Dear abhi,
I'm getting some combination of ups and battery with price list..Please choose which is good price?

1) Luminous zelio 1100 + Luminous 150Ah (2.5 y +1.5y warranty) = ₹ 17800

2) Luminous zelio 1100 + Luminous 150 Ah ( 3y + 2y) = ₹18800

3) Microtek sebz1100 VA = ₹4400 and Amaron 150Ah (3y +1y) = ₹12000 and Amaron 165Ah (3y +1y) =₹12500

Microtek Sebz1100 + Amaron 150Ah (3y+2y) = ₹ 16400

4) Microtek sebz1100 + Exide 150Ah (3y replacement) =₹17700

5) Microtek sebz1100 + Exide 150Ah (3.5y replacement) =₹ 19700

6) Microtek Sebz1100 + Exide 150Ah (4y replacement) =₹ 21900

7) Microtek Sebz1100 + Mtek 150Ah (2y) =₹ 14900

Please tell which combination is best for price and life?


Dear abhi,
Thanks for your information about this..

Abhishek Jain (Mod)

Luminous zelio 1100 + Luminous 150 Ah ( 3y + 2y) = ₹18800 looks best to me. Same brand inverter battery combo can get you good service.


Dear abhi,
You told about Luminous zelo 1100 combination..Just now I identified about Luminous zelo 1100..It has 900VA and 650watts only..Microtek Sebz 1100 have more watts..Which can i choose in those options?

Abhishek Jain (Mod)

You have selected combinations of good inverters and good batteries. You can go for anyone of them. I selected same brand inverter battery because the manufacturer does regular maintenance for you. You can go for Microtek combo as well for the same reason, but warranty is less. Or you can go for a better battery brand with longer warranty on the battery.


Dear sir,
Does power taking depends on Invertor VA or battery Ah..
Please choose which takes more electricity bills..

1) Microtek Sebz 900 pure sine wave + Amaron 150Ah

2)Microtek Sebz 1100 pure sine wave + Amaron 150Ah

Abhishek Jain (Mod)

As you have the same battery, the difference between consumption of the battery will remain the same. But an inverter with more VA value will have slightly more losses. But then it also give ability to add a few more appliance to it in future. So one with more VA will have slightly more electricity bills.


Sir - I bought a exide invared 350+ 100ah tubular battery in mar 2013. my usual load is tube
light-1, fan-2 and the backup time reduced to 2 hours in 2016 and the battery is dead in 2017. so
the battery came for less than 4 years which is very less for a tubular battery. the power outage
is not frequent, 1 hour per power cut, 4-5 hours a month. I regularly topped (filled) with distilled
water. In fact, everytime I fill the water, the backup time significantly reduced, what is the reason
for this? in the last topping, the battery backup fell from 30min to 1min

this time I'm thinking of buying Flat Plate battery which is cheap. suggest me the 100ah battery
with good life. Is amaran Maintenance Free is good? does it require topping of distilled water?

I have sukam shiny 650va invertor, does it have trickle charging?
can I switch off the invertor every other day, so that the battery is allowed to discharge slightly

Abhishek Jain (Mod)

Hi Bala,

Sukam Shiny has Fuzzy Logic Control which is Sukam's technology to manage battery charging. Fuzzy Logic Control has AITM or Artificial Intelligent Trickle Mode which senses the battery charge and reduces the charging accordingly.

Maintenance Free batteries have less life in general. They would not last beyond 4 years. Tubular batteries if used well (inverter should also treat them well) can last up to 7-8 years. Maintenance Free will not require topping, but then it does not last long. You can certainly switch off the inverter regularly.


7 celing fans+10 tube lights+12 cfl bulbs+1 t.v.+ 1 grinder+ 160 watt standing fan+ 55 watts standing fan for 4 to 5 hours, what is best sine wave inverter for home ? thank you.

Abhishek Jain (Mod)

Here is your calculation:

ApplianceCountWattageTotal WattageHoursTotal Wh
Standing Fan11601605800
Standing Fan155555275
  Total2451 9255

Your backup requirement is large. You will need 4 batteries of 180 Ah each. You will have to go for a 4 battery 3.5 kVA inverter. You can check Luminous Cruz 3.5 KVA 48 V inverter.

Load more

Send this to a friend