Home Inverters :How to Select the Right Inverter for your House

Selecting the right inverter for your home has become a tough task these days. There are so many terms we need to understand - 800VA/ 1000VA, Tubular Batteries/ Flat Batteries, Half Load/ Full Load and the list goes on. And on top of all these, availability of multiple power back up solutions and misleading information provided by sellers have further added to buyers woes. So I did some research and study before buying an inverter for my home and I'm sharing the details of same so that you don't have to go through the same problems while buying an inverter.

So What do You Need - UPS or Inverter?

This is one of the basic confusion people face, so let me start with answering this first. UPS and Inverter are words used interchangeably though there are not exactly same. UPS (Uninterrupted Power Supply) is just a system which allows INSTANT switchover to the power back-up source in case of a power failure. The power back-up source can be a battery or something else. Whereas an Inverter is a system which converts direct current to alternate current hence enables using a battery for backing up equipments running on AC power supply. Inverter uses a battery to provide power back-up. Computer UPS comes with in-built battery which works as back-up power source and can provide back-up for 15min. to 30 min. So if that much of back-up is sufficient for you, you should be fine with buying just a UPS for your need. But Inverter comes with more powerful battery and can provide support for electrical equipments, computers, home appliances etc. and also gives more hours of back-up. Most of the inverters come with in-built UPS which ensures that power failure doesn't cause fluctuation and your system switches instantly to Inverter's Power Back up battery.

What Capacity of Inverter is Good for Your Home?

Once you are sure that you are looking for an Inverter, it's important to calculate the capacity of Inverter that will suit your requirement. Following table will give you brief idea about the power consumed by various equipments.

Tubelight - 60W

Fan - 70W

Television - 120W

Laptop - 100W

CFL - 25W

Modem - 50W

Now you are in a position to understand as what capacity inverter do you need and I'll let you do that in 3 simple steps -

1. Calculating your power need

Now I'll explain you how to use above table to calculate the right capacity Inverter for your need. Let's say you need Inverter to run 2 Tube lights, 3 Fans, 1TV and 1 Laptop. As per the table above, you'll need a total power of 550W(=2X60 + 3X70 + 1X120 + 1X100) to support all of your equipments at the same time.

♣ Your Total Power Need = 550W

2. Calculating required inverter's capacity

Now that you know how much power is required, it's easy to get the VA rating of inverter. In ideal condition, the VA rating would have been same as the power need i.e. 550VA. But in practical conditions, the power factor of Inverter is less than 1 hence power supplied by 550VA Inverter won't be 550W but lesser than that. Assuming power factor of Inverter to be 0.7, following are the details of calculation -

Required VA of Inverter X 0.7 = 550W

♣ Required VA of Inverter = 550/0.7 = 786 VA

Now luckily we have inverters available in the market with 800VA capacity, so such inverters will fit into my requirement.

3. Calculating battery capacity

Till now, you will have clear understanding of the Inverter capacity required for your need. But the next question is that how much back up will the inverter provide and for how many hours you can run all of your equipments. And that's where battery capacity comes into picture. It's the battery which determines the back-up hours. The higher capacity battery you have, the more back-up hours you'll get. So lets get into the calculation fast.

Required power(in Wattage) X Required back-up hours(in Hours) = Inverter Voltage(in Voltage) X Battery Capacity (in Ampere Hours)

Let's look for an Inverter which can give back-up of up to 3 hours, so for our case -

550W X 3Hours = 12V X Battery Capacity

♣ Battery Capacity = (550 X 3)/12 = 137 Ampere Hours

So we need a battery of 137AH capacity but if you check the market you'll find batteries of 130AH capacity. So that should be more or less sufficient for your need.


Finally, we have come to the conclusion that if we go for 800VA Inverter with 130AH battery, I can run 2 Tube lights, 3 Fans, 1 TV and 1 Laptop for up to 3 hours. And by the end of this article you don't need to rely on sellers for understanding your need as you can do the calculations yourself in just 3 simple steps. Hope this article helps you in some way in making the right decisions. Let me know if you need any other inputs.



Comments 438 comments

Nayan 7 years ago

Thanks Setu for this self explanatory article. it makes the job very easy to select an inverter with all these details.

AKM 7 years ago

This is very good , technically knowledgeable article. Thanks.

Rod 7 years ago

Thanks, an interesting article. Following on from this i have a question. I am currently looking into using a renewable energy generator for going off grid if at all possible. I can calculate the wattage my generator will produce and I am thinking of a 12v or 24v DC supply. The trouble I have is calulating the number of inverters etc I will need. I know from my bills that I use an average of 9Kwh per day, however, in theory I could use a tumble dryer, cooker, kettle, microwave, tv and fridge freezers etc at the same time which would produce a continuous load of between 10-15kw. The largest inverters I can find are 3-5kw so am I right in thinking that I need between 3-5 of these to potentially satisfy the load I may use? If so this makes it an expensive system to set up thats all.

Nirav Jain 7 years ago

very knowledgeable article. But in the above article no surge current of the appliance is considered. Generally the appliances like TV refrigerator have surge currents and need power during startability. Do the above selection method of calculating VA and Battery capacity will take care of surge current of appliances.

netra 6 years ago

hi sir i want to fitting inverter in my home vip system auto online system and auto on loadsayding system on pls sir i want to circuitdiagrams of homeinverter fitting system

u have sir pls send me sir

Marshel M Louis 6 years ago

I think this is a very reasonable and intelegent approch guide towards the basic, from where one can step up and calculate once requirements. The surge current is to be defenetely considered when going for an inverter. Thank you for the guide line.

karthik 6 years ago

very nice explanation. good job

p ram mohan 6 years ago

thanks for good info. But is Sqare wave type & sine wave type. Which one to go for normal home needs.

jithu 6 years ago

great idea,its very helpful,but here u take 12v,hw we knw the volt?

SANDEEP MALIK 6 years ago


Sudha Pradyumna 6 years ago

Hey Thanks. Thats a very simple and clear article explaining the requirement understanding. Thanks a lot and keep posting more such articles:).

prem swaroop 6 years ago

This is very useful and interesting article . Even a lay man can understand .. thanks for the article..

Shujah 6 years ago

Thanks. This was a very helpful article.

REJOSH 6 years ago


kanthasamy.s 6 years ago

This is very good technical support for calcullation of invertor application user

sulata 6 years ago

great explaination. wish you were a physics teacher.india would get many more knowledgable engineers.it makes life easy if there is someone to guide you like this. thanks once again.

Sunil Desai 6 years ago

very nice technical information about UPS/ inverter

Thank You

Pakalavan 6 years ago

Excellent article!

aravind gunda 6 years ago

very nice and useful for all

Vineet  6 years ago

The article is really very informative.Thanks ksetu. Something to add:

Square Wave Inverters

Simplest and least expensive in the market. Computers, televisions, induction motors, transformer loads and even light bulbs are not recommended to run on this waveform, because square wave has a high harmonic content.

Sine Wave Inverters

This is the correct waveform on which all electronic equipment, televisions, and computers are designed to run. They filter the output voltage well and recommended.

Quasi-Sine Wave Inverters

Indeed correct selection for running some types of motors and incandescent lighting and not fit for all types of equipments, hence it is not recommended.


thankyou for the valuable information

Hiren 6 years ago

Excellent Article...Thanks a lot

rakesh thapa 6 years ago

thanx for the excellent piece of information. I could easily calculate my requirement.

SARVESH KATE 6 years ago

Good technical info dear.Layman like me can definetly benefit from it.

Swathi 6 years ago

Excellent information ksetu and Vinnet. Thanks a ton.

Raj 6 years ago

That was nice.Please tell me what should be the Watt for the refrigerator used and the desktop as well.Please post me at govrineni@yahoo.co.in

Sandip from baranagar 6 years ago

It was very much helpful for me to understand those calculations

Suha@Raj 6 years ago

This is the inverter- am planning to buy...





Input AC : 130V-300V

Input DC : 12V

Waveform : Modified Square Waveform

Frequency : 50 Hz ± 1%

Can you calculate the number of hours - product usage only AC.

Arul 6 years ago


Very very useful article.

niket 6 years ago

Excellent Article...Thanks a lot

John Iranaeus 6 years ago

Thanks a lot for the calculation. Real good help.

sanjay makar 6 years ago

thanks a lot for this article

Its really very usefull to calaculate backup.

Good Job indeed

venky 6 years ago

xcelent one bro.....thanks

Krishna Doss M 6 years ago

Good and simple article.

Easy to understand and adequate information to select an Inverter.


Dilip Avere 6 years ago

Thanks. You are doing very good job. You provided me a very nice inoformation. You are doing social welfare work. I againg smart thanks.

Sreenath 6 years ago

Very useful article. thank you.

Neeta SALUNKE 6 years ago

Tell me one things,

what is the manufatureing cost for 800VA INVETERS.

sam 6 years ago


stsuresh 6 years ago

very useful article and thank u sir.

Vishnu 6 years ago

Thanx a lot. This is very useful information shared. Can you share that , can we use Air condition with invertor. If yes, what is the invertor and Battery capacity need for it and approx cost.

logesh 6 years ago

thanks .. for explaining the inverter concept

ravi.k.g 6 years ago

this is very useful to comon person like me

thank you

Faraz 6 years ago

Nice explanation

Chandra 6 years ago

Thanks for the information Bro!! Articles like these makes life better compared to the inverter itself!!!!

CHARLES SUNDER 6 years ago

Realy very Good information sharing. People in the market want to sell their products by missguiding the customer. Finialy the customer is fallen in trap.

This will be an eye opner to all. Tks a lot.

Utpal 6 years ago

Very illuminating article. Thaks a lot !!

Robert 6 years ago

Simple and very good idea about inverter which I really needed. Thank you

Ramsewak 6 years ago

Solution of complexity in simple steps. It is nice. Thanks!

GANESAN - PAMMAL 6 years ago


robert 6 years ago

I have two question:

First can I use power inverter while charging by solar?

Second Solar rated Amp and Battery charger rated output current will work for same formula? if not please advice how to calculate charging time of battery charger and solar charging.

gopalaswamy 6 years ago

I am sorry that I have not seen this site before for I have unneceraily cheated byacompany that for 6tues +5fans+ TV for 4to 5 hrs they have sujested an invertor1KVAwith fuji 150AH battery and I have so installed but I got back up for one hour only

venkatesan pallipattu 6 years ago

very good article. Thank u.

Rassie 6 years ago

Hi...lovely article...but Ive used the 600W inverter and a 102A battery and found that the 8 energy saver lamps just popped! What's the cause of this problem?

raju 5 years ago

Very useful info. Thank you very much.

Good summary 5 years ago

Good Summary, thanks a ton

shanmugam 5 years ago

Really superb...Its easily understanding...

Saurabh 5 years ago

I loved this. Pretty clear what are we looking for. Thanks a bunch.

Senthil 5 years ago

Very Useful... Appreciate your effort

Jeet 5 years ago

Its owesome yaar,,Its very helpful to get clear our reqirement.

Prnaav 5 years ago

Appreciate your analysis on this stuff.. glad there are people like you wanting to guide people like us to make the right choice.

NSR 5 years ago

The article is good enough but there are some bugs in estimating the backup time calculations. I am sure that we will never get 3 hrs backup time at full load (800VA/550W)with a 12V, 130AH battery.

a veeraprakash 5 years ago

sir ur gidence is fantastic & quite clear ,i too request that please update further more what type features ,battery protectors & its life

ramana 5 years ago

very useful and knowledeble article, any body can understand with this articles to purchase inverter what we need.

mayuri baghel 5 years ago

thank you for explaning the calculations terms for me, its really helpful while buying invertor

vijay 5 years ago

thank a lot for such a great information...I was looking for an Inverter and this information has helped me to make right choice....appreciate a lot

Srikanth 5 years ago

Its good self explanatory article for a non techinical person. Thanks a lot dude. Keep Going

Debabrata Dutta 5 years ago

thank a lot for your information...I was looking for an Inverter for my home use and it will helpful for me to make right choice....again thanks

Manmadha 5 years ago

Thanks a lot very very useful and helpful calculations for domestic invertors.

Sanjay 5 years ago

Excellent article...Thanks a ton man

Gaurav 5 years ago

Very nice article,

Thanks for information sharing.

ram 5 years ago

nice to see this info, simply superb

Kar 5 years ago

Thanks a lot , this helps ....

kiran 5 years ago

Thank you.

santosh M 5 years ago

Hi Setuji

your explanation is so easy to understand and to buy inverter in the market with more confidence. Thank you very, much this made my job very easy.

khadeeja 5 years ago

good article...easily understandable..........thank you

rms 5 years ago

very good. keep it up. thank you.

Naga Pradeep Movva 5 years ago


Thanks for ur Information.., we are expecting from u such a more valuable articles in future too...,

sujit 5 years ago

very helpful article. million thanks

sabari 5 years ago

Thanks a lot. Very good and nice article.

RAVI 5 years ago


K Manohar 5 years ago

Thank you. Your article provides clear direction to me. Very much useful.

Sarat Dunna 5 years ago

Thanks a lot.

krishna  5 years ago

Thanks a lot. Hope this article will help me to buy an invertor for my home.

siva 5 years ago

very useful and simple explination very good sir ur article is very useful

Yogeesh 5 years ago

This is really informative. I suggested this URL to my friends who are looking for inverters at their home. I have added this to my favorites and will add this to my blog too.

Few comments pointed out bugs/differences in calculation; but I feel, the difference must be negligible and this will not affect a lay man to calculate his need. Any how we can't get products accurately as per our need. So, I feel, it would be better to go for slightly higher valued products/models after the suggested calculation.

chandra 5 years ago

thanks for the nice article. I need clarification after selecting battery capacity and the usage duration.Your example consider battery rating of 130 AH for the considered load for 3 hours usage.( I presume 12v rating is normally used for inverter battery).

Considering the usage of inverter for longer time due to shut down from normal power supply, can I use the above battery for about 8 to 10 hours if I restrict to use of 1 tube light and 2 fans

Studying Physics :) 5 years ago

Precise. Nicey =)

Prkash 5 years ago

Really a good article:-) just got to know wts an inverter and how to calculate our specification Thanks buddy!! for such an wonderful article...

Roy 5 years ago

I have got a 450watt wind turbine what sort of inverter would you recommend: 2 options high load for short period or low load for longer period.

shree 5 years ago

thanx dear, its too useful artical. you explained so easy to calculate the capacity.

thanx again

pramod kumar 5 years ago

very help full for freshers

K G Ramachandran B E (Mech) 5 years ago

I am always very much allergic to Electrical Equipments.

Your explanation is simply Super. Thank you!

Nandikeswara Rao  5 years ago

This is very nice article. Very Helpful.Thank you.

pankaj patel 5 years ago

thank you very much for selection data of inverter, can you suggest that what is sine wave inverter/

sathish 5 years ago

good i am inderstand that thank you

sathish  5 years ago

good i am understand that thank you

Ray Rosado 5 years ago

Can I runnb two(2) 115AH batteries in parallel with a 2500W inverter??


Ray Rosado 5 years ago

Sorry I posted before sgninig up; I appologise but I have to repeat just in case.

Can I run two (2) 115AH batteries in parallel with a 2500W inverter??


Pravin Barve 5 years ago

This is a very help full article for calculation of inverter and battery.

thank you for giving this calculation

Ragesh 5 years ago

Very Useful info. Thanks for sharing

Subodh 5 years ago

Thanks for explaining in a simple way covering all the points. This explanation has helped me select the Invertor specifications

chaitanya 5 years ago

thanks friend u have provided valuable information. i am searching the net for exactly this information. once again thanq

Kash 5 years ago

Hey Setu,

Awesome information.... this is a very helpful stuff who is looking for the info abt inverter. This will help may others in future. few steps N u'll know what 2 buy.

God bless u .....

tinsan 4 years ago

Thanks a lot 4 d crystal clear explanation..

mangesh 4 years ago

thanks for the use full explanation.

AD 4 years ago

Thanks a lot, wonderful job you have done to simplify for people like me who dont understand all this too well.

shaila kiran 4 years ago

Nice one, easily understood, I want to buy but one question, how much w is required to run fridge on inverter in the same time washing machine.

jayakumar 4 years ago

excellent .....thank you very much ...please explain about volt ampere and its calculation...

ar 4 years ago

Thanks !

jey 4 years ago

Thanks for your valuable information

Kisorre 4 years ago

Thanks a ton for the clarity that you have given about Inverters selection process. Now I know how the selling guy talked the nonsense. An excellent way of looking at and arriving at my need for inverter

Prof Ben 4 years ago

Excellent Help !!! Amazing Man !!!! Keep helping people against exploitation by cheap minded middle men. Thanks a lot for saving me around 5k !!!! Prof Ben

Tapan, Rourkela 4 years ago

THanks for very nice explanation.

Roshan from Kolkata 4 years ago

Its a graet helpful article for new byer's of inverter. GOOD

Prabu 4 years ago

Thanks.its useful for me.thankyou very much.

rajesh 4 years ago

Thanks Very simple to understand.

vandana 4 years ago

Great article! Keep it up!

Nikhil 4 years ago

Thanks for detail and clear information....

ramakrishna kottapalli 4 years ago

dear sir very useful and simple article for anyone to understand their needs

Naresh 4 years ago

You are the man dude

Phani 4 years ago

And I thought there was so much to the calculation. This is too good.

sunil kumar chandrikapure inspector 4 years ago

Thank you so much.now i am become a ready to take right decision instantly with the help of your good technical support

Electrical engineer 4 years ago

Thanks a lot useful information

Sonika 4 years ago

nice explanation..thank you so much

shailen 4 years ago

first time i have seen nice thinking in sharing the information, thanks very nice information

sulab thapa 4 years ago


B.Ashokkumar,Chennai-5. 4 years ago

Very GOOD Service,it is useful for all.This type of suggestions sharing. I request,the professionals may share in this regard and also give the tips about the price.Thanks a lot

P.SUBRAMANIAN 4 years ago

highly useful article. i inyend to purchase an inverter and a suitable matching battery. this article will go a long way in helping me by answering all my lingering doubts. thanks a lot.

Saikiran 4 years ago

Thanks boss .by this artical now i have got complete knowledge about inverters .thanku very much .

Saikiran 4 years ago

Thanks boss .by this article now i have got complete knowledge about inverters .thanku very much .

Rakesh 4 years ago


steve 4 years ago

very helpful info. thank you

SAKTHI BABU 4 years ago


Hari 4 years ago

I am grateful to you! Thanks for posting.

Pratik 4 years ago

i was searching for this answer in whole google...good job !! :)

Jupiter276 4 years ago

I think there are some missing cases here. Please consider!

First of all, let talk about the PV system which power such system (inverter, battery). Depending on the weather condition, you will size a PV system that can surve your 1kW load, for instance (in some using time).

But because the time is large, and weather condition is poor, you need about 3kWp PV system.

In this case, you have an inverter of only 1kW (or, ok, 1.2KvA) but the PV system is about 3kWp.

According to the book "Planning and Installing PV system..", it is stated that the capacity of an Inverter should be in the range oF: P(pv) x 0.8-1.1 times. Therefore, I think the inverter should be reslected to suit such big PV system, but not dpending on only the peak load.

what do you think?

Walid 4 years ago

Does the "sizing the Inverter" calculation work the same if I am trying to power a load of 30A at 220V? What size charger do I Need if any?



vicky 4 years ago

its very useful thank u v.much

ram 4 years ago

good articleeeeeeeeee

mani 4 years ago

very useful in an simple way

vs senthilkumar 4 years ago

oh!!!!! really great explain about UPS thanks

Milin Shinde 4 years ago

Excellent Article...

Thanks a lot

xyz 4 years ago

really nicely written, even who don't know anything about power supply can calculate and ask for the required inverter, thumbs up

i donno why people find this article funny, coz they have no brain:P

Rajesh S 4 years ago

Nice one... Thanks for sharing this...BR // Rajesh

Abbas 4 years ago

Very informative

suresh 4 years ago

5 tube lights, 3 fans and 2 tv what capacity we should use and how much of charge it need for 3 hours.

Sathish Rosario 4 years ago

Very fine,

But I expect a automatic calculator to determine everything.

Only the input will be

how many tube lights, how many hours,

how many fans, how many hours etc...

If any one find that calculator please let me know.


+91-9003458250 (India - Tamilnadu -Coimbatore)

vijay 4 years ago

very useful info..thank u

uvais 4 years ago

This knowledge sharing is really helpful for me.And keep doing the good work.

And i have one doubt as we calculating the battery capacity,how we can know the Inverter Voltage(in Voltage)?.

please clear my doubt.

mail id:uvais80@gmail.com

Narahari 4 years ago

simple and superb. great calculation.thank u.

rahamuthullah 4 years ago


Sundarapandi 4 years ago

Thanks for valuable information

thiru 4 years ago

thanks a lot

Mukesh 4 years ago

Very Nice,

Dont forget this is an Old Article and still a useful Article for "BASIC" Calculations. Its really very informative for the Home needs. I would like to add that this article should be read keeping the point in mind that this is to clear your basic confusions for selecting an Inverter and more particularly when the marketing people tries to deceive you by giving wrong inout to sell there product. So it is Wonderful. Thanks............. -:))

Vipin.I.R 4 years ago

Thanks a lot

ramakant prasad singh 4 years ago

thanks...really helpful for me technically

K. Mohamad Nasar 4 years ago

As Iam Mechanical Engineering Graduate.. I dont know what type of inverter cum UPS have to buy for my home.. your words are simple and understandable.... thanks for your explanation... be updated

veeramani, TN 4 years ago


this is very very useful informations while installing Home ups system

R Madhava rao 4 years ago

Thanks for the simple work sheet. It is easy to calculate. I found it very useful to me.


Sundararaman 4 years ago

Details provided in a technically simplified form. Quite useful

Ram 4 years ago

Very useful information and clears our confusion in selecting the right one.

md.akbar 4 years ago

thanks for furnishing sufficent information for likeminded people.

dev 4 years ago

Thank you. It just straight to the point.

Hari 4 years ago

Thanks for the excellent guide you have posted. I can face the dealer with enough information and not be taken for a ride! Thanks again:-)

Arun Kumar R 4 years ago

Thanks for this useful information. Very well explained

D. Rangarajan 4 years ago

Thanks for your valuable information to the society particularly who are being cheated by the suppliers due to their ignorance.

warm wishes,

D. Rangarajan.

tushar 4 years ago

thanks for your efforts...its very useful article

ravi 4 years ago

thank u very much useful article. I searched a lot and finally got a good article thanks once again

ARUN 4 years ago

Thanks for your valuable information to the society particularly who are being cheated by the suppliers due to their ignorance

v.m.perumal 4 years ago

thanks for the excellent but simple article, guiding buyers with good knowledge to assess the requirements. Inspite of the high educational qualifications, people in other fields may not be able to decide the invertor, battery and fall pray to the exploiting dealers.

thanks again for the informative article

P.M.PANDIAN 4 years ago

thanks for the excellent guide,thanks a lot.....

sirisha 4 years ago

Thank u somuch. too good

Zubair 4 years ago


MILELE 4 years ago


Rajashekar 4 years ago

Super article Nice very useful for this..

Thank You Thank you. Thank you

ravindra 4 years ago

this article is very useful to select a best invertor for all applications

prasanna 4 years ago

Very good article. Thankyou

siva rama raju 4 years ago

i like this artice ,very simple to under stand thanku very much

anonymous 4 years ago

Great Explanation... very useful informatiom... Thanks a lot... Got a clear idea of inverters.

Vasi 4 years ago

Thanks Sethu. Happy I found your article just when I was planning to buy inverter

Abhishek 4 years ago

Nice explanation buddy!!!

Sridhar 4 years ago

Thank you Sethu for valuable information.

john 4 years ago

Thank u. it's a very good explanation

Vijaya kumar 4 years ago

Thanks for your lending help hand.

NK 4 years ago


abdul raoof 4 years ago

the percentage of battery energy used before the inverter is off need to be also taken into account

mahesh 4 years ago


Ram 4 years ago

Very nice, Thanks for your information.

neha 4 years ago


mani 4 years ago

excellent presentation

SELVAM 4 years ago


rajesh g 4 years ago

really very good explaination in understanding way

prakash 4 years ago

its really helpful to me. b'caz anyone can do who doesn't knowledge in this eee field. obvious calculations.....

karthi 4 years ago

thanks its very useful in my studies

Sateesh 4 years ago

Nice Technical calculation and very helpful in taking a decission

Prabu Manoharan 4 years ago

Nice and easy guide. Everybody who had started thinking to buy an inverter should read this. KSetu, keep it up

Mohamedali 4 years ago

Fantastic explanation for selecting the invertors & batteries.

Shoban 4 years ago

Excellent Article

baskar 4 years ago

thankyou verymuch

prabhakar 4 years ago

Excellent explanation, useful to all who are going to buy invertors. Keep it up KSetu.

jnravi 4 years ago

Thank you for an easy to understand article. I would like to know how to choose the right type of battery. I want to install an inverter for my residence in India. The challenge is I will be staying there only for one month in a year and the rest 11 months the house will be locked and not used. I am told that the battery will run down if not maintained or used and I will end up buying a new battery every year. Is there any solution?



chandu 4 years ago

it was very helpful

Shyam 4 years ago

Thanks for such a simple & very useful explaination.

jude dsilva 4 years ago

Thanks most appreciated...

Alibaba 4 years ago

Nice one.

Well explained.

After read this, everyone will be able to calculate their own requirement.


vinod 4 years ago


ratan 4 years ago

very useful and knowledgeable.

shiva 4 years ago

its very useful formule

surendra 4 years ago

Great Job

ChandraSekharareddy 4 years ago

It is a very nice article,you done a great job

vasusingh 4 years ago

thank u very much very simple and technical calculation which is very use ful to everyone thanks once again

arun 4 years ago

very useful

Sreedhar Chedde 4 years ago

Thanks a lot


WoooW ! GooD & Useful Information ! Thanks !

Surendran 4 years ago

Thanks a lot

aa 4 years ago

grt man

Joe 4 years ago

Ksetu, very helpful article, thanks a lot.

could u pls calculate that how long it will take to full charge a 130AH battery(12V)?

natraj 4 years ago

thanks mr k setu,this article is very simple and easy methods to find the correct inverter.

razaalhoda 4 years ago

Thank you for an easy to understand calculation. You helped me in easy and understading way I would like to know how long a EXIDE Inva Tubula 150AH Battery will take time to be fully charged? I want to install an inverter for my residence in India. What is the life of this battery? Kindly reply with your comments.

S M Ruknuzzaman 4 years ago

Thank for your article,but in practical field this equation does fulfill the requirements. Please Specify the other factors.

Arun Armugam, Tiruchengode. 4 years ago

very nice technical information about UPS/ inverter.

Thank You very much Brother..

Mani 4 years ago

Very good simple to understand...good job

bala 4 years ago

very good.. I was looking for this one.

K.HARIKRISHNA 4 years ago


prashanth 4 years ago

Actually I was in confusion to buy inverter because of no guarantee information from seller/product, so delayed. Now I am really clear abuot it after reading your article.

Thanks alot for your effort to make us to understand ;)

MANOHARAN C N 4 years ago

Really great Based on ur clarifiction recently i purchased inverter and battery

D.KRISHNAKUMAR 4 years ago

Very good explanation.Thank you.

VIMALESAN 4 years ago

Really Nice. Every one can understand even non-technical peoples.

mahendra 4 years ago

Its very good.Everyone can understand easily....Thanks

Anand 4 years ago

Excellent, Marvellous dude.... very very useful stuff... God bless you. :)

vani 4 years ago

good explanation thanks a lot

Joshua onos 4 years ago

Simple and interesting explanation,its really solved my problem.

Thanx, good job.

xen 4 years ago

Thanks so much for this useful information!

Akkil 4 years ago

Thank you so Much!!! Excellent!!

ms arasu 4 years ago

very usefull thanks a lot

Akki 4 years ago

Thanks to educate the peoples....this is very usefull informatio and knowledge about Inverter and Calculating battery capacity.....Thanks

Ranga Reddy 4 years ago

Thanks, This is very useful...

shantini 4 years ago

nice article.this is very useful

Gopal 4 years ago

Still it's the excellent article among the google search

mrs.prasanna, chennai 4 years ago

Such an illuminating article. thanks. Currently I use 1500VA, exide battery to run 8 tubelights, 3 fans, 1 system? drops of very shrotly. Servcing is as



dental handpieces 4 years ago

Much, you the subject is very great and useful for us ... Thank you for giving readers like me. xyj

zain 4 years ago

out class and wonderful article

hari 4 years ago

i have the ups with expired battery can i put 130ah battery to that ups and can i use it like an inverter

Sawroop 4 years ago

I have a 300VA inverter and i am planing to buy 60AH battery. Does 300VA inverter can charge 60AH battery?

Madhes UAE 4 years ago

Really good to know about the these details always as a general knowledge for everyone.

Thanks for the article/

Praveen Kumar 4 years ago

Very useful info

Ajay 4 years ago

I find this article very useful because i am looking for a suitable inverter for my house.

raj dat 4 years ago

Hi boss . This is really very much useful to me. Thanks.

Sirius Sols 4 years ago

I love this blog thanks for sharing such a nice blog its very educational I realy lke it its very positive and have a very nice point of view thanks

Prince.S 4 years ago

Nice Job.Keep it Up.It's Very useful...Thanks

Bashir 4 years ago

I've found this precious writeup trully helping. pls keep up .... you shall see blessings in your life.

is there a similar short & precise way for determining the size of solar panels to work with the system?

chiru 4 years ago

how we will decide inverter voltage as 12v or 24v

Ravinder Singh Yadav 4 years ago

Thanks for such a clear explanation! I am looking for a good battery for my 800VA Sukam inverter and your post helped me a lot in understanding the basics of inverter/battery requirement.

raj 4 years ago

hi this is very usefull & thanks.

Pawan 4 years ago

The Best Explanatory article. I am clear what is my Inverter requirement is .

Murali 4 years ago

explained it in excellent way... Simply best

Venkata Prashanth 4 years ago

"If you can't explain it simply, you don't understand it well enough" - Albert Einstein

I am sure you are a pro in this subject and have given a simple and beautiful explanation. Excellent !!! Thanks a bunch !!!

Narendran 4 years ago

Now a days power-cut is a major head ache for all age people.So,everyone should aware of solution for a power cut.This is a very very useful articles and even any one can understand and calculate their requirement of UPS and battery backup according to their needs.

Vaibhav 4 years ago

nice article ,precise .thank you

Mahesh 4 years ago

Thanks very much a lot. I got an Idea.....

viswa 4 years ago

Thank you so much for nice info.

I need transformer y not work in dc:)

does v get dc output in transformer ah:)

pls let me know abt tat.


Ahmed 4 years ago

Very nice explanation and picturization. Well done.

Sree 4 years ago

You are great Setu!

Shivcharan 4 years ago

Thank You very much for yours guide line.

Antonio 4 years ago

Excellent article! It should help all the people in purchasing the correct and right type of Inverter according to their capacity needed. THANK YOU ONCE AGAIN PAL.

ajay aggarwal 4 years ago

thank you so much for providing such an important information it makes my job so easy thank you so much..

hara kumar 4 years ago

i hav a small doubt.while calculating the inverter capacity u have considered the powerfactor.but for. battery capacity calculation u hav directly equalized the A/C power reqd& battery outp

ut.no need of consideration of power factor here?

Raj Chhetri 4 years ago

Your information helps anybody confused regarding inverter capacity. THANX.

Sivaram K 4 years ago

Excellent Article and really useful article. Personally It helped me lot for deciding the right invertor for my home requirements. Thanks for the information.

amit 4 years ago

thanks a lot for this useful article. it helped me a lot to decide the right inverter for my home.

khan 4 years ago

Excellent article Kesu....thanks a lot.

AMBETHKAR 4 years ago


Sai Prasad 4 years ago

Dear Setu,

You really made me very simple in selecting a inverter according to my requirement by finger tips. I really appreciate your endeavor and please keep it up.

Thank you once again.

Hi setu 4 years ago

I am really thankful as I was Wondering about the battery, Inverter and the Capacity, searched the internet, and wasted several hours, But Didn't get anything useful, I am really thankful to you as you made it simple and easier for me to pick the best inverter for my home.



febi 4 years ago


Kenneth 4 years ago

Precise and inteligent

Pritam K 4 years ago

Thanks Sir!

karimullah 4 years ago

Thank you Very much sir.

Giridhar 4 years ago

Very informative to take a quick decision...Thanks a ton

Paul Joseph 4 years ago

Excellent article. Neatly composed.


THANGARAJ 4 years ago

That was nice.Please tell me what should be the Watt for the refrigerator used and the desktop as well.Please post me at thangarajtruecare@gmail.com

babajan puttaparthi 4 years ago

I am really thankful 2 u sir

prasad 4 years ago

excellent article...

Nilesh Pophale 4 years ago

Excellent...Very informative to take a quick decision & selection.

Malay 4 years ago


sdp 4 years ago


UNP Gangadhar Raju 4 years ago

thanks brother......for the information.......when i went to purchase the inverter ...i got a doubt ...based on my requirements how to select a inverter.....really your content given an idea ......good

senthil 4 years ago

Usefull one

indra sekhar neelam 4 years ago

Excellent............... Good

VENKAT 4 years ago

Good sir, I know the details about this article and i decide to go for taking good item in market.venkat

venkat 4 years ago

very good article

mahesh 4 years ago


karu 4 years ago

thanks for ur valuable article....nice answers.........

akhil k das 4 years ago


chok 4 years ago

super article

sa 4 years ago

Good Job !!

Mani 3 years ago


doss 3 years ago

thx. most useful article.

Ramkannan 3 years ago

thx... u done a great job..

and please suggest me which company inverter is best for home use...

R Ravi 3 years ago

Long life Battery650w , i want company name?And Price

Nilesh 3 years ago

Thanks brother...... for the information..... very much helpful.

ilayaraja 3 years ago

u done a good job Thambi......

Mahesh 3 years ago

Yeppa Sethu, nee utkaarndhu yosippiyo! Sooper appu. Summa nacchunu nadu mandaila adichutta po.

Dariya 3 years ago

Awesome. I am one of those person who was really confused in understanding which one to buy and how to calculate. I got clear picture now. Thanks a ton.

pv balasubramanyam 3 years ago

very well explained in a simple manner. this is useful for new distributors of inverters like me for understanding and explaining to customers.

thank you very much

saravanan 3 years ago

`useful article

ragothaman 3 years ago

very very wounderful article every one will easily understood to calculate their required load, thank you for post this article

Virat 3 years ago

thanks setu,

Very knowledge full article in very simple manner

sharma 3 years ago























pradeep 3 years ago

fabulous info

Eswar 3 years ago

Thanks bro and your article is very easily readable manner and very useful to everyone.

Mahesh 3 years ago

This was very helpful and a very valuable information to gain on battery usage for inverter, Much appreciated.

Mohan 3 years ago

Thanks for the Article. It really Helped..

nitin bhandari 3 years ago


Amrit Prakash 3 years ago

Thanks a lot how helpful for me it is, i cant even tell youuuuuuuuuuu

saiganu 3 years ago

Excellent Article...Thanks a lot

sreenath 3 years ago

great job

ramyakrishnan 3 years ago

ya this article has given me to select the inverter according to my need. thanks for that............. and also i need information about the best company to buy inverter............. pls can any one say..............

vinod kumar 3 years ago

i think there should be mentioned battery voltage inspite of inverter voltage because 12 volt can not be inverter voltage.

Govind 3 years ago

good article

shree 3 years ago


ansar 3 years ago

thanks its very useful article

Murajith Menon 3 years ago

Thanks for the excellent article written in simple words, for even a layman to understand....

krishna 3 years ago

Thanks a lot!

P_Sirurmath 3 years ago

Thank you so much for valuable information.

Madhu 3 years ago


Jeptha 3 years ago

Very good analysis ... Thank you so much for this valuable information

iliyas 3 years ago


ur explanation is absolutely fantastic and very useful in knowing the basic details.

it helped me in my calculations for inverter and battery.

thanq so much

Jilan 3 years ago

Thanks. Good one

Gnanasekar 3 years ago

Nice & Precise Calculation

Narayanan 3 years ago

I was asking this question to all the inverter dealers and they were giving me specifications which they are not sure whether that would suffice my needs. Thanks for the precise calculation. This helped me a lot.

ansuman 3 years ago

excellent !!! but one thing i want to know that whether the type of battery

tubular or flat plays any kind of role ???

Praveen 3 years ago

Good explanation - complete basic knowledge on calculating exact capacity

Manoj 3 years ago

Really very useful information thanks...

ajay pandey 3 years ago

very nice calulation....

Veerender 3 years ago

Good One....very helpful....

kamal 3 years ago

excellent article

G.P. Rama Rao 3 years ago

I never expected such explanations. I was in black position about inverter, and your explanation achieved to get correct and suitable inverter for my house. Thank a lot

CapitalP 2 years ago

Three years after, your explanation is still educating and enlightening.

Thank you, i learned a lot.

sanjay 2 years ago


you have done a very nice job.

very interesting and useful to the budding engineers.............

alok 2 years ago

very good article

Alif Khan 2 years ago

This is very useful article. Thanks

Prasad 2 years ago

Good One....very helpful....

Dharma Reddy 2 years ago

Great work by you setuji.dont know where r u from..but i liked ur article.it is crystal clear.Hope God blessing will be with you and ur family.

gmail id


julien 2 years ago

the only thing the article doesn't say is that the battery will not last a month. you can not discharge more then 50%...if more the life of the battery is very short.

i have 1392ah batteries(48 *232A*6Vdc)

ChadeArreve 2 years ago

As a Newbie, I am permanently browsing online for articles that can help me. Thank you


Jacob John 2 years ago

Simple essay with good narration keeping layman in mind . Thanks

GANESAN 2 years ago


Chaitanya 2 years ago


Anand 2 years ago

Thank you for a very, very, very, very useful article.

madhu 2 years ago

Thank you so much bro...it really was so much helpful for me.....

B M KUMAR 2 years ago

thanx dear, its too useful article. you explained so easy to calculate the capacity.Excellent article Kesu....thanks a lot.

Girish 2 years ago

Wonderful article...thanks a lot...

A.R.Mahendran 2 years ago

very useful article


Useful information.Thanks.

Babu 2 years ago

Very useful Information Brother. Thank you Very Much

Vinay 2 years ago

Excellent information and very useful.Thanks a lot for such valuable guidance.

Vinay N Bhagwat 2 years ago

Excellent information and very useful.Thanks a lot for valuable guidance.

adi 2 years ago

very good artcle for normal person.

balu 2 years ago

excellent info.....

Pawan Rampuria 2 years ago

Very Useful info., thanks :)

binod 2 years ago


Pavan 2 years ago

Nice one...Thanks..helped me a lot

Subrahmanyam 2 years ago

Nice article, Good Explanation.

k.soma sekhar 2 years ago

thank u for valuable information

kumar 2 years ago

good one

gaganklair 2 years ago

thanks sir.it is very use full information

dattatreya 2 years ago

Thanks setu, for ur comment. it is really nice .

Imran 2 years ago

thanks a lot !!! article was really helpful

Sakib Mollah 2 years ago

thanks a lot to give a clear idea for inverters..

Gowrabathuni Chaitanya kumar 2 years ago

Thanks for Motivate me. The information really helpful for every buyer. once again really thanks.

RAVIKIRON 2 years ago

I have a unit with 875 VA and 150 AH battery. Can I connect one more battery for extended back up. nayak.ravikiron@rediffmail.com

vijay 2 years ago

very useful article thanks

how to share it on facebook

M N RAO 2 years ago

Informative. Useful for the domestic potential customers.

sukhpal singh 2 years ago

This is very usefully 3 simple steps

Harish Thapar 2 years ago

Excellent Article with clear content

Ranadeb 2 years ago

Excellent information for the newcomer's who want to purchase for domestic purpose.

jayant 2 years ago

This is nice information for layman to understand about inverted information. I wanted to purchase but was not having any knowledge about it. Thank that now i can confidently talk to the seller and search for good product..

Aryan 2 years ago

Excellent Article

shubham 2 years ago

Very helpful article. I have been thinking which is the appropriate inverter for my house. But didn't know what should be the power of inverter and the battery capacity which is sufficient for my house. But after reading this article I know which inverter should I look for.

farhana 2 years ago

Thnk u vry vry much. Ths informatn was vry... usfl fr me.

Anjan 2 years ago

Thnks... 4 ur well explanation...

rizwana 2 years ago

Very useful thanks alot

swapnil 2 years ago

Very useful information


Krishna Murthy 2 years ago

This is nice information, thank you....

ramesh 2 years ago

thank u very much for posting valuable information this is useful to all thanks once again

Saini B 2 years ago

thanks for the important facts. i want more information regarding how much MW of solar panels are required for the same load.

praveen 2 years ago

The above info leaves out very important information about fusing and cable sizing - a 1000w inverter will draw 80+ amps at full load and that needs an appropriately fuse to protect the cabling. The cable sizing between the inverter & battery should not only be large enough take into account the amount of current to be drawn but also to minimise the voltage drop.



Sachin 2 years ago

thank yo for sharing very useful update with Us

Abhishek 2 years ago

I want to run 1 40" LED and a tata sky connection at the same time.....what kind of inverter should I buy/use??

rajiv ranjan 2 years ago

Thanks for great and important information.

Multan ge 2 years ago

Very nice and simple to understand. Good job

yyneedu 2 years ago

Your information for selecting invertor and battery is very usful.You would have also consider the cfficiency of battery, which will normally 80 to85 percent.

Harish 2 years ago

This article explained me about the Selection of Inverter in very simple and crisp language.

VamcKasyap 2 years ago

Thank you so much. Very help full article

rdugg 2 years ago

Please let me know if there is any preferred brand inverter. Any feedback on V-Guard inverter.

Thank you


Kondeti 2 years ago

Thanks for sharing such an important information.. it's very useful and easy to understand..

Kiran 2 years ago

Thanks Dude, very nice and detailed explanation.

Giriraj 2 years ago

Hi Admin,

I have narrowed down to three options

1)Sukam shiny 850 VA sine wave UPS + exide IT500 battery(150aH)

2)Sukam shiny 850 VA sine wave UPS + sukam tall tubular battery(150aH)48months warranty

3)Exide original Inverter 850 va with LCD display+ exide IT500 battery(150aH)

which one is the best configuration,my priorities are in following order





Balan 2 years ago

Very nice article for the users like me who are new to inverter buing . . .

KVAPPARAO 2 years ago


Vishal 2 years ago

very helpful..

Zaheer 2 years ago

Woow...gr8 explanation...made things difficult for sellers..now v can choose what exactly we require.


vakkalagadda eswar 2 years ago



Required VA of Inverter X 0.7 = 550W

♣ Required VA of Inverter = 550/0.7 = 786 VA

vakkalagadda eswar 2 years ago

suppose i want an inverter of 1000w for 4 hours a day,

then 1000wx4 hours = 12 vx battery amp-hours

or Amp-hours = 4000/12 = 334

dividing by the power factor of 0.7= 477 Ah

now my little query is that this 447 Ah= how many battery units, so that with the inverter, the required number of battery units can be purchased.

hope both my queries will be looked into . thanks. i have bookmarked this page of yours too.

Ajith trivandrum 2 years ago

very very nice!!!!!!!!!!!.

ANKIT 2 years ago

good article

mithun 2 years ago

thanks... it's helpful :)

balaji 2 years ago

It was very help full. Thank you verymuch

shreyas 2 years ago

Nice article , Thx for sharing

krunal 2 years ago

Thanks. so easy. Well written

2 years ago

Nice one and every body a lane man can have a idea to what type of inverter he has to purchase..........Prasad dvv

CHANDRASEKHAR A 23 months ago

Thankyou very much. You made the math behind choosing inverters simple.

Prasad 23 months ago

It was brilliant KSETU.

Very useful for a customer to get cleared with his requirement.

Thanks a lot

mutalib 21 months ago

70 watt

MUSTHAFA 20 months ago

Thnk u vry vry much. Ths informatn was vry... usfl fr me.

vasant Kumar 19 months ago

Thanks a lot now i know the basic information which every one should need to know.

jasmin 19 months ago

Thank you . It help me a lot

Rahul 19 months ago

Hi I am looking for 550w output and 10 hours of back-up. Can you plz advive.

kunal 19 months ago

Hi. Thanks for the details and spcifications. It is really useful. If I wat 6 hrs of back up what size of battery should I buy??

Ganesh gaur 19 months ago

Great brother m thanks to u for sharing this to us.

Nat 19 months ago

simple and straight forward.

Gull Nawaz 18 months ago

thanks a lot dear. you made my choice very clear

Dev, east of kailash 18 months ago

Just superb! Described so simple way and put simple fundamentals that really made easy to understant.

Sagar 18 months ago

Super theoretical explanation which can help anybody to decide the right thing.

T.Vijayan 16 months ago

I am having a GCI Omnik 2kwx220dcv inverter and another Off Grid invert2.2kwX48v having 12VX150AH=4nos

During Power failures i want to take the 230V Supply from off grid with a changeover switch from grid to off grid supply as supply to On grid Inverter.Will there be any reverse power to off grid during reduction load demand

Prasad.R.Pillai 16 months ago

Very useful information.


DEVENDRA 16 months ago

Thank you very much...very good information...

mahendra sharma 14 months ago

very very good artical I like it very much it is very helpful


Debarchan 12 months ago

Very helpful.

Tandon 12 months ago

Good Information! If anyone looking for new inverter battery and inverter than go to Batterybhai.com

SSREDDY 12 months ago

Thank You So Much. It saves my time to find the correct Inverter to my home.

yuvaraj 11 months ago

thank you its very useful for me. now iam cleared

ashok dass 11 months ago

Thank you v much....

Aamer 11 months ago

Thank u.

jagdish brahmbhatt 7 months ago

Thanks,very useful guide.please kip it up.

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