Quote:
Originally Posted by Ccsluke
With (2) 6 volt batteries in series you double your voltage but your amp hour rating stays the same as one single battery.
With (2) 12 volt batteries in parallel your voltage stays the same but you double your amp hour capacity.
ALSO: with (2) 6 volt batteries, if one goes bad, it’s GAME OVER!
With 12 volt batteries, if one goes bad, just disconnect the bad battery and your back in business. Albeit half capacity but, at least you have power and time to deal with the issue.
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All true BUT.....If using 2 6 volt TRUE deep cycle batteries i.e. golf cart batteries, or batteries designed for solar panel use, etc. and not a 6 V antique car battery, then the batteries will survive the deep discharging and recharging cycles far better (read last longer) than any 12 volt battery that I'm aware of.
This a I believe accounts for the 2 - 6 volt deep cycle popularity among frequent boondockers.