How to Calculate Solar Panel Battery and Inverter?

Solar calculation for home

  1. Inverter
  2. Battery
  3. Solar panels

Step 1:- Home electrical load calculation?

Step 2:- Inverter Selection?

Step 3:-Battery Selection?

Step 4:-Solar Panel Selection?

Step 1:-

Home Electrical Load

4 Led Light    = 4x25 = 100W

2 fan              = 2x80 = 160W

1 Tube Light = 1x40 = 40W

1 Led TV        = 1x50 = 50W

Total Load = 350W

Step 2:- Inverter Battery

House Load: - 350W

Consider - 500W

However, Recommendation is 800-1000W best

AC load =350w

Battery DC Volt = 12V


DC current required

P = V x I


350W AC Load …DC current required (I) =29.17=30A

Step 3:- Battery Size Selection in AH

Formula:-W x H/V

Where: - W= Total load (350w)

H= Backup time in hours (8)

V= Battery voltage (12v)


Battery Standard: - 250AH

Battery Select: - 250AH

Battery Charging Current

We will calculate charging current for 250AH battery .As we know that charging current should be 10% of the AH rating of Battery.


Charging current for 250AH Battery

                       = 250X10%

                       = 25A

Solar panel Current =Battery charging current + Home load current

                                   = 25+30

                                   = 55 A

Solar plate’s power

Formula = V X I

                = 12 X 55

                = 660W

  1. Of Solar panels

340W Home load (AC) = 660W Solar panel required DC

The 660w Solar panel below is available in the market.

  1. 125w
  2. 180w
  3. 375w
  4. 440w

No. of solar plates =Total solar plates watt/single panel watts


= 3.66 Approx. (4)

No. of solar plates:-4 panels (4x 180w)

350w home electrical load

Inverter: - 800-1000w

Battery: - 250Ah

Solar panels: - 4 X 180w


Stephanie Sally

Stephanie Sally

Hello everyone, I am from Wembley, Britain. I want to write this testimony to tell others and thank Dr. Odunga for what he has done for me. The first 12 years of my marriage I had 5 miscarriages and I was called all sorts of names by my mother-in-law and this made my marriage life very hectic and a burden of sorrow. I contacted Dr. Odunga for help and I will say that he is a very strong and honest man and he indeed helped me solve my problem. I saw his email in a testimony and I contacted him, little did I know it would be the end of all my problems. After 2 days of contact, I received a fertility herb and he told me to use it. The herb worked and my husband even loved me more and bought me expensive things. One afternoon, I went to a nearby hospital and came back home with the positive result of my pregnancy and after 9 months I gave birth to a baby boy. Ever since I contacted Dr. Odunga, my story has been different. I have 3 children at present and I am very happy in my marriage. Please, contact him at OR Whats App him +2348167159012 to help you too

Manuel Franco

Manuel Franco

I just want to say Thank You to everyone who supported me through the years. My name is Manuel Franco, New Berlin, Wisconsin. My story of how I won the Powerball lottery of $768.4M is a bit of a tale. I have been playing Powerball tickets for 6 years now since I turned 18. I bought my first ticket on my 18 birthday. I was feeling very lucky that day because I had contacted Dr. Odunga Michael to help me with the winning Powerball numbers. I really had that great great feeling that I looked at the camera wanting to wink at it. I only did a tiny part of it and trusted him. He gave me the numbers after I played a couple other tickets along with it for $10. I checked my ticket after the winnings came online and saw the numbers were correct including the Power play. I screamed for about 10 minutes because it felt like a dream. I had won $768.4M. You can check my winning testimony with the lottery officials just with my name search. Thank you Dr Odunga. Well, his email is and you can also call or Whats-app him at +2348167159012 so you guys can contact him

Leave a comment

ഏറ്റവും കൂടുതൽ വിറ്റഴിക്കപ്പെടുന്ന ഉൽപ്പന്നങ്ങൾ

Engineer VisitEngineer Visit
Loom Solar Engineer Visit
Sale priceRs. 1,000 Regular priceRs. 2,000
Dealer RegistrationLoom Solar Dealer Registration
Loom Solar Dealer Registration
Sale priceRs. 1,000 Regular priceRs. 5,000