How to choose the right inverter & battery for your home?

Guidelines to choose right inverter

Are you planning to buy a new inverter or upgrade your old one? Whatever maybe the reason, it is very important to understand what is the right inverter for your home. The power requirement at your home can be different from you neighbor’s home. So do not just blindly install the same inverter (in terms of power) in your home. Before buying an inverter for your home do a little homework and understand the basics.

At the end, we’ll also recommend some reliable and secure batteries from sellers that you can trust on Amazon.

First understand your Power Requirement

One of the most important factor that you must know before buying an inverter is your “Power requirement”. In simple words- what all electrical appliances (like fan, tube lights, television, CFL etc.) you want to run at the time of power failure. The power requirement is addition of the power consumed by various electrical equipments.

Suppose you want 3 Fans, 3 Tube lights, 1 CFL & 1 television to operate at the time of power failure. Below is the power consumed by these items:

1 Fan – 70 Watts

1 tube light – 60 watts

1 CFL – 25 watts

1 Television – 120 watts

Therefore your total power requirement is ( 3*70 +3*60 + 25 + 120) = 535 watts

Find the VA rating of the inverter you need

It stands for the Volt ampere rating. It is the voltage and current supplied by the inverter to the equipments. If an inverter operates with 100% efficiency, then the power requirement of the electrical items and power supplied by inverter is same. But we all know that 100% or ideal conditions don’t exist in real.  Most  inverters have the efficiency range from 60 % to 80%. This efficiency is also called power factor of an inverter and is simply  the ratio of power required by the appliances to power supplied by an inverter. Power factor of most inverters ranges from 0.6 to 0.8.

READ ALSO:  8 useful tips to take care of your inverter battery!

Hence Power supplied (or VA rating of inverter) = Power requirement ( power consumed by equipments in watts) / Power factor( efficiency).

Here average value of power factor or efficiency  is considered i.e. 0.7

Power of inverter (VA) = 535/0.7 = 765 VA

In the market 800 VA inverters are available. So an inverter with 800 VA will be the right choice for your home.

Know the battery your inverter needs

 Battery is the backbone of an inverter system. The performance and life of an inverter largely depend upon the battery quality. The next big question is “how much back up will an inverter provide?” or for “how many hours it can run all of your equipments?”. This is what is called the battery capacity. It is the battery capacity that decides the back up hours. It is expressed in Ah (Ampere Hours).

In the market batteries with capacity of 100 Ah,150 Ah, 180 Ah etc.  are readily available. So how to decide which one do you need? To find this out lets do a reverse calculation. Consider that you need a battery that provides back up for 3 hours.

Battery capacity = Power requirement  (in watts) * Back up hours ( in hrs) / Battery Voltage (in volts)

Battery Capacity = (535 * 3) / 12 = 133 Ah

** Value of Battery voltage is taken 12V

Therefore a battery with a capacity of 130 Ah will work for you.

So if you want to run 3 fans, 3 tube lights , 1 CFL and 1 TV for 3 hours during power failure you would need 800VA inverter and 130 Ah battery.

By understanding this simple calculation you not only save yourself from the misleading information shared by inverter dealers but also  help yourself in taking correct decision.

READ ALSO:  Facing inverter noise problem? Here are the causes and solutions

Here, are some batteries on Amazon that we highly recommend.


Mr. Right believes in making its customers smart and aware of the home repair and improvement.

For  inverter repair in Delhi, Noida, Gurgaon, NCR, Mumbai, Bengaluru, Hyderabad, and Pune contact Mr.Right.


These days, everybody is looking for and pushing towards more sustainable resources of energy and solar energy is the frontrunner in these areas. So if you are also considering going for solar energy, here are top reason why you may want to consider solas inverter battery instead of normal inverter.

benefits of solar-inverter battery

Loom Solar has analysed inverter battery market in India, 2018. As per their observation, Normal Inverter Battery has some limitation, whereas Solar Inverter Battery removes their limitation. Loom Solar has design a new inverter battery with solar, called Solar Ready.

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    this content is just copied word to word from luminous website. Divya – try to create your own content to earn money not by copying

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    I guess 130 Ah battery won’t be enough for 535 W load, we need to take DOD of battery and battery efficiency into consideration. Battery sizing will be bellow :

    =(535*3*100/80*100/85)/12 = 196 Ah

    VRLA Battery DOD- 80%
    VRLA Battery Efficiency – 85%

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    nice.Thank you for the sharing this wonderful information, they are very helpful.I have problems with most of the things mentioned above.You have provided some good solutions to prevent these problems.Thanks for sharing I appreciate that!

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    Sir, i have amron 700va inverter…i need backup for a laptop and a airtel modem for 6/8hours…which battery is good for me please suggest

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    Very helpful calculations. Thank you a lot. In India, we need a back up of at least 8 hrs, so it will be better to include all calculations for at least 8 hrs.

    • 17

      The author is talking calculation of 1 battery so if you require higher duration then you need to add 2 more batteries in parallel to last of 8 hrs provided that your inverter supports adding batteries in parallel.

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      I basically means that your inverter runs either adding 2 12v in series or 4 12v battery in series. These are for high 3 or higher VA inverters

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    Mr. Right.

    Thank u very much for ur time to share ur knowledge. U saved my money n effort.

    Thanks once again

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    I am planning to get an inveter and battery for my home.
    2 fans ,
    2 (9w LED),
    1 Modem/Route,
    1 Laptop,
    1 50″ TV,
    1 Refrigerator,
    1 mixer grinder
    usage :2-4 hours
    Could you please suggest the best product


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    ur articles r really honest clear and helpful.keep up ur good work.nw iam planning to get an ups and battery for my home.
    4 fans ,4 (20w) cfl,2(5w)cfl back up should be for 12hrs can u plz suggest me wat to buy
    after reading ur article i have planned to go fr exide tall tubular battery and ups.
    should i buy 850w ups n 150ah battery
    1500w ups and 200ah battery.plz suggest me

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    now iam aware of battery capacity inverter from ur demo part,very useful information, i appreciate u, iam being civil engineer, now iam confident to calculate /choose the req. of me

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    One system and 1fan ,and 1 tube light, operating purpose so what is capacity of battery and inverter i will choose please suggest me

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    Dear sir please give suggestion .
    our requirement book distribution vehicle lighting required ,
    1. 9 watt led lights 8 nos ac
    2. speakers with mike dc
    3.12 watt led lights 4
    please give suggestion for with size battery and inverter suitable our vehicle .

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    I have one doubt about load calculation here total load is 535 watts. Here no starting power is calculated is necessary or not.

    Starting power = total load * 0.25

    = 535* 0.25

    = 133.75

    So we add this starting power with total load 535+134 = 669 Watts.

    This is right or wrong. It’s necessary or not.

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    I have 2.5 KVA microtek inverter with three 150Ah decide battery. Power cuts are not frequent in my area. Can I put my home on inverter daily to save electricity? I do this by cutting the power supply .

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      Your inverter battery needs to be charged by ac supply, and you lose around 25% power while charging. Again while using inverter to run appliances in home again you lose 25%. So in effect your bills will be up by 50% if you do so.

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    I am currently using 3-month’s old Luminous Eco Volt 1050VA Inverter with 3-year old APC 120AH battery. I am not getting sufficient backup time with this battery and want to replace it with a new battery with more backup time of 5-6 hours. Please advise me on the following:

    Can you please suggest which is the best suitable battery – 150AH / 160AH / 180AH / 220AH ?

    Can I use 2 numbers 120AH batteries in parallel on 12volt 1050VA Inverter? will this give sufficient backup time without affecting the performance of the Inverter?

    Please advise on the above.

    Thanking you,

    27, 2ND Cross
    Nanjappa Layout
    Behind Syndicate Bank Colony
    Bannerghatta Road
    Bangalore – 560076
    Mob: 9448364535 / 26584535

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    i think this ,Battery Capacity = (535 * 3) / 12 = 133 Ah is not correct. in my point of view ,Battery Capacity will be (765 * 3) / 12 = 133 Ah. bcz load is 535 watt and power of inverter is battery capacity will be (765VA*3hr)/12V = 191.25 we have to use 200 Ah battery.

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    If we purchase inverters of higher VA ratings then electric bills will come at a higher side. So better to purchase inverter of exact required nearest size. Another thing to note we may not use all the appliances simultaneously. Mostly 1 fan and two tube lights in emergency . ie,70W + 25W+ 25W=120, So inverter we require is 120/0.7=172 ie around 200 VA. Similarly for 8 hrs back up Battery of 12V Size will be 120×8/12V=80 Ah. Hence you can keep the budget at the lowest much below than 8000/- else have to shell around 18000/- adding to that you may get inflated electric bills as higher rating inverters consume lot of power plus battery replacements every three years.

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    My Grateful thanks for updated information. This has given me inspiration to buy one for my home use. Best Regards, Arvind Gaikwad

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    While calculating,
    Battery Capacity = (535 * 3) / 12 = 133 Ah. You must consider power of inverter(i.e 765W) rather than 533 W.

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    Learnt how to calculate the inverter & battery need as this will help to verify whether the dealers are telling us the right info or not. Great to go thru the article!!!

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    i want to know whether i can run a 0.5 hp (500w) well motor using my current inverter without any extra load. My current inverter is sukam falcon plus 1600va(24v with 150 ah battery)…

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    “But we all know that 100% or ideal conditions don’t exist in real. Most inverters have the efficiency range from 60 % to 80%. This efficiency is also called power factor of an inverter and is simply the ratio of power required by the appliances to power supplied by an inverter. Power factor of most inverters ranges from 0.6 to 0.8.”

    Power Factor is NOT related to efficiency of the Inverter.
    It is related to the reactive power of the load connected (ceiling fans, lights etc.)

    You need to calculate the individual VA consumption of all the loads and add them together.

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    It gives more information to the people who had less knowledge in this field. So much useful with this information while buying inverters in shop. thank u sir.

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    I am thinking about to buy a new inverter battery. But not sure what would do best for everything. Have spent a lot of time on reviews but it almost seems like a draw right now. But review this video to be honest my confusion is clear, Thanks.

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    Realy is very useful article for people who don’t have much idea about inverters. Thanks for sharing. if you know about whiech battery & invertrer make is best for home.. pl share

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    For best inverter & Batteries search in Google and a list of best stores who sell batteries and inverter is open. Here i suggest you some best online portal they sell batteries that is Snapdeal, Batterybhai, Okaya, Jabong, Batterywale, Smartsbatteries and more.

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    Hi. In the above example, suppose you replace the 130AH battery with 180AH one. Wil it increase the backup (hours) without any problem? or causes any damage to the life of Inverter? Pls reply. Thanks.

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