Our '90' camper had no set up for its own battery. The converter runs everything from dual truck batteries when plugged into it. When on shore power or generator I always unplug the camper from the truck. We usually start and run the truck 30 minutes every couple days when staying for a time but mostly move from place to place every one to two days. When we stay for a week or more we're always plugged in to shore power. Have been thinking about adding house batteries and or solar lately but the expenses and more complicated operating system are something we'll have to think about a bit more. Old dogs can learn new tricks, just more slowly. That and the age of the camper, how much is too much to invest? Decisions, decisions. So far our set up works fine for us and there goes my DH with the "If it ain't broke, don't fix it" thing.