There is actually a large benefit of going with heavy duty 6 volt versus 12 volt batteries in almost every case.
If you look hard at the specs you will come up with more amp hours available. You will also get more bang for the buck when purchasing
I have tried both ways and am back to 4 T105 AGM Trojans and they are well worth the expense.
We can run heat, fridge, all night and still brew coffee and have lights before generator run time
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