Don, when I had the solar install done, AMSolar put 4 4GT-6CTs in after first considering the 4CT. They are 6 volt, 2 pairs seriesed, then both pairs paralleled. At 300ah each, but having 2 pairs seriesed, gives 600ah total available, then should only use down to 50%SOC to prolong life. Just discussed LiPO4 units this am at their shop--came to conclusion would lose to much on the good batteries just to swap out. But will go Lithium if my ship ever comes in...
They are GOOD batteries.
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2016 Tiffin 40QBH
2015 38RSSA--traded
2005 36TK3--retired, but it was a good one
2017 F450 KR
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