Brand New and In Need of Rv advice for Dummies You should have a couple of batteries (at least) tucked around the RV. One is usually wired to just start the RV. . . .and the others are for running your lights, radio, heater, etc. Obviously, without the electric hook-up at a campsite, you will not be able to use your outlets, unless you have a generator. Normally, things like the microwave, outlets, airconditioners will only work if you have the electric hooked up or you run a generator. But. . . .your hot water heater, your fridge and your stove should all run off gas. The only thing that may sound odd is running the fridge off gas. It should have a setting for electric or gas right out in plain sight when you'r looking at it. Or . . .it might be behind the panel outside. One thing to remember when you're running your camper heater on battery power is this. If the battery runs too low throughout the night, it will not have enough juice to spark and light off the gas for the heater and the blower will continue to run without ever shutting off. Don't ask me how in the world it can have enough juice to run a blower all night and not enough to light some propane, but. . .that's what happens on mine.