I installed a 2000watt inverter wired to an progressive dynamic transfer switch to power the whole RV. It automatically switches to inverter on loss of shore power and transfers back to shore power when available. I used a AC 4 contact relay to isolate both ACs, microwave, hot water heater, and battery charger when on inverter. I also have a 30 amp generator plug at the front of the rv that uses the inverter circuit through another transfer switch and another relay to power the RV along with one AC and battery charger but keeps the second AC and hot water heater isolated when using the generator. Everything works automatically and keeps all power sources isolated from one another as well as isolating high loads when using alternate power sources.
Shore power has priority over everything and generator has priority over inverter.
