Thank you both for your replies. My inverter/charger is a Tripp-Lite RV750ULHW and is buried without easy access. The on/off switch is located beside the monitor panel which does display the charge level of the coach battery. I do get full power in all outlets when using shore power with the inverter in the OFF position. Ardum Snowbird, I think my unit is the same as the one you describe, so thank you again for clarifying that the switch is actually a remote and the OFF position is correct for charging when hooked up to shore power.