Reflex439 wrote:
I thought it might be a cheap battery, but wasn't sure. So a 200 amp hour total capacity should get me 200Wh before needing recharge?
Er... No.
Cheap is cheap, AH is AH, and 200 AH battery in a good shape will give you about 1,300 WH before needing a recharge.
What you need is a "deep cycle battery". The one that has capacity rated in AH.
A single 200 AH 12V deep cycle battery will need a crane to lift it. Normally people buy 2*100 AH. Or a pair of 6V golf cart batteries for total 225 AH.
1AH = 1WH/13V.
Battery should better be recharged before it drops to 40-50% of capacity.
Your old Group 24 is not rated in AH or WH because it is not intended for slow discharge. Roughly, it "was" about 80 AH = 1,000 WH capacity with 500 WH usable capacity when it "was" in a good shape. Right now - hard to tell.
