Originally Posted by houstonstroker
My inverter is a pass through design. On generator power the inverter is not really doing anything.
I believe there is a 2nd transfer switch on the inverter that diverts to outside 110v when it can get it. The 1st transfer switch is of course between the shore power and generator so that when the generator is on, all 110v comes only from it.
Otherwise (no 1st transfer switch) the shore power cord would get 110v anytime the generator ran, or in some cases, the inverter ran, which would be dangerous if it were plugged into camp shore power that had failed and somebody was working on restoring camp power.
The safe end result is that, if the generator is running, all 110v comes from it alone.