Hi all, my 2000 30' Fourwinds currently has 1 regular 12v battery- I see the pan is designed for a 2 battery setup. I happen to have two 6v deep cell Crown golf cart type batteries that will parall...
A 2000 RV likely has a single voltage converter at about 13.8v. That will not recharge your 6s properly (or that single 12v, but replacing that is cheaper than two 6s.) but they will last a while.
Budget issue whether to replace them whenever, or make them last longer with a better converter/charger that will meet the battery charging specs.