My propane refrigerator can also operate from a generator's 120V AC.
I have a backup singler burner camping stove and a Weber grill (both of which use uses those little green propane bottles - of which I carry several) to somewhat backup the galley propane stove and heat kettles of water to somewhat backup the water heater.
I guess it would be best if I replaced the camping stove with an electric hot plate, replaced the Weber with an electric equivalent, and installed a 120V AC electric element kit in the water heater (in combination with it's propane burner) ... to provide for an all-electric generator backup of our RV's main propane system.