Join Date: Aug 2006
Location: Arlington, VA
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Hey, it's fun. Hope it's useful, too, to dispell some wayward notions :-))
Here's a last note re: paralleling batteries...
Given the same house load (frig, lights, nav gear, radios, etc.)...
And given an installation consisting of two banks of two T-105 batteries rated at 225AH for a 20-hour load, with the banks wired through an A-Both-B-Off switch ...
Which situation will provide more total amp hours before the batteries are depleted (drawn down to 10.5V or whatever cutoff point you like)...
1. running them as two separate banks, one after the other; or
2. running them as one large combined bank?
If you've followed this thread closely, by now you should know that the answer is #2, because you'll be putting a relatively smaller load (actually, half the load) on each of the batteries in the combined bank, and we know that the smaller the load the more AH can be drawn from a battery.
Yet another reason to combine 'em :-))