When we had 4 220AH 6V batteries (for a total of 440AH @ 12V), our batteries would last all night after a full charge, then watching a couple of TV's for a few hours, a few lights, and running the same 16 cf fridge. They would still be at about 12.3 volts. That was when they were new and it great shape. But a few minutes after the coffee maker started, they would dip to 12.1 and the gen would start.
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Vicki and Mike, Aria 3901- The Wined Up Bus, towing 16 Jeep JKUR.
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