Buying a RV Motor home, my ? Is can we use it as a back up generator? It is a 2009 Daewood 34 ft.

It depends on what you are looking to power on the RV. Once you decide what to power, you should add up the running watts of each appliance to determine how many watts you need. Typically, the RS 5500 is more power than you need. I would recommend an inverter style generator because it is quieter, more compact, and weighs less. Inverter generators are designed for RV usage.