profdant139 wrote:
I have two group 31 12V marine deep cycle batteries, which supposedly have a total capacity of 110 amp hours. In the real world, that means that they have a theoretical working capacity of only 55 amp hours, since I am told that it is not good to draw the battery down below a 50 percent state of charge.
Each, yes (at the 20 AH rating) ... but paralleled together you'd have twice that, say 200 to 220 AH. A pair of 12 volt G31s paralleled together would typically average similar capacity to a pair of 6 volt GC-2s wired in series - say ~ 220 AH, half of which would be considered usable, say 100 to 110 AH, not 55 AH. What am I missing in what you're saying? :h
