Help required: Calculating Kwh produced from Ah consumed

[edmundp]

Hi All,

I am terrible at math. Please help me! I searched but could not exactly find the way to calculate the amount of Kwh produced from Ah consumed.

Scenario:

I have an inverter running at 90% efficiency @ 48V. If I used 570Ah cumulative from a battery bank over a couple of days (about 6) how much Kwh @ 230VAC did I produce?

Sounds like high school "woordsomme". Haghhhh.

I know it is more complicated in a solar setup with solar production, etc. but I would like to know just based on battery production.

Thanks!

 

[Johnatan56]

https://lazycackle.com/Convert_from_Ah_to_KWh___Online_Calculator.html

 

[$m@Rt@$$]

Volts X Amps = Watts

 

[itareanlnotani]

P = V * A

Power = Volts * Amps

Assuming power factor of 1; 570Ah x 48V = 27,360W
Multiply the 27,360W by % to get an approximate figure.

Your 90% efficiency is wrong though.
Lead Acid is closer to 75-80% efficient, not 90%
You lose going into the bank, and coming out of the bank.
Look at round trip efficiencies.
Your inverter is also going to be lossy, although modern ones are extremely efficient, mine is 98.4% efficient (Allegedly).

 

[edmundp]

Thanks guys - that is what I got to but was not sure.

The 570Ah is measured independantly as truely extracted over time from the bank. The 90% is a rough figure of the inverter efficiency.