battery bank

[Sunking]

Now that is a pretty heavy battery system.

I understand there is a relationship between the battery voltage, weight and Ah. What I was trying to figure out is the math to determine the weight of a battery and got confused when you stated it was related to 100 pounds per kWh the battery could produce. Both a 12v 100Ah battery and 6v 200Ah battery produce 1.2kWh so they should weight the same but don't.

Sorry did not mean to throw you off. I was really trying to demonstrate to the OP the relationship of weight to energy mass, and how voltage and current are related to power as a product of the two. I should have just said:

1200 wh = 48 volts x 25 AH
1200 wh = 24 volts x 50 AH
1200 wh = 12 volts x 100 AH
1200 wh = 6 volts x 200 AH

They all weigh roughly the same 120 pounds, and take up the same amount of volume.