hi guys our 380fl has a built in 5500 Onan. We are planning to full time in it while we build a new house. The generator is certainly going to come in handy but I also want to add a battery bank so that the gen isn’t running all the time. So I’m going to need batteries and an inverter but how do I hook the batteries and inverter into the system? Can I use the existing transfer switch from the generator? Will it automatically switch over to the batteries inverter when I turn of the gen? Thanks