Interesting post Mobilesport. In June I replaced my 105AH lead acid batt with 2 100 AH lifepo4 batteries through Alibaba. My class B has a small battery box, but they built these to fit it. I do a lot of boondocking in FLA during Feb & MAr, and was really looking forward to not worrying about powwer use as much with these. But health issues have me unable to go. I recharge with a 120 watt portable solar panel while I park in the shade. I plan on adding another 120 watt solar panel to help recharge. The few times I'm on shore power my PD4635 converter/charger does the job, though limited to 35 amps. When I have my Honda 2000 genny it goes through that charger, but I do not take it to FLA - room is a premium. I hope to be able to go next winter.