diy solar

diy solar

Amp hour calculation 6v 》12v x3

IHaveThePower

New Member
Joined
Jun 4, 2022
Messages
49
Could someone enlighten me how to calculate the following amp hrs

I bought 6, 6volt 215amp hr batteries each with 395 reserve capacity
I'll wire them to 12v and bank them so 2x3 or 2s3p

I need to tell my shunt what it's measuring and I've never worked with 6v batteries.

Are there any considerations or is it just as straightforward as banking 12v to 24v

Am I right to just take 215ah x 3 so 645 ah @ 12v
And since these are just standard canadian tire Nautilus deep cycle batteries would I tell my shunt half of that and operate at 50% efficiency or tell it 645 and just set a low voltage cutoff at 50%
 
Ah is voltage specific, so putting elements in series doesn't add the Ah. 2S 6V 215Ah is simply 12V 215Ah. If you put them in parallel, they add Ah.

a 2S3P bank of 6V 215Ah is 12V 645Ah

You can always convert to Wh as that's voltage independent. it's the easiest way to compare the storage of batteries at different volts:

6 * 6V * 215Ah = 7740Wh

7740Wh/12V = 645Ah
 
Ah is voltage specific, so putting elements in series doesn't add the Ah. 2S 6V 215Ah is simply 12V 215Ah. If you put them in parallel, they add Ah.

a 2S3P bank of 6V 215Ah is 12V 645Ah

You can always convert to Wh as that's voltage independent. it's the easiest way to compare the storage of batteries at different volts:

6 * 6V * 215Ah = 7740Wh

7740Wh/12V = 645Ah
Thank you Eggo
Helpful as always!
 
Back
Top