OK folks...I have a 40ft Desiel Motorhome (Alpine Coach) Unit sat for two weeks -- came back -- started unit, fine. All Electrical items on Coach fine - everything worked like a charm. Star...
When that happens to me, it is usually because the transfer switch inside my inverter has popped its breaker. I just reset the breaker on the Inverter.
That transfer switch breaker (not to be confused with the Gen/Shore TS) will pop, if I am using too much AC power draw (ie. Microwave, hair dryer, heater, coffee maker, roof air, heat pump etc).