I just went to three batteries this year. I installed a disconnect switch right off two of the batteries to the camper. The third battery is connected to the other two with a switch that automatically opens if either side gets below 12 volts. The third battery goes to my generator. So far, all has been great. I keep checking my batteries while in storage and I'm still at 12.4 on all after 3 weeks.
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2011 Silverado 3500 dually diesel
2012 Keystone Raptor 410LEV
Previous 2001 Jayco 23B
Previous 1973 Coleman Popup
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