Interesting discussion.... right now I am dealing with the same issue with my still-under-warranty Dometic air conditioner. It will run when the coach is plugged in to shore power (but sometimes does labor at startup and show a 10% voltage drop on my crappy volt meter which is plugged in to one of the RV outlets) but causes the generator to shut off with a low voltage fault. I had the gen set load tested at the local Cummins service center and it was fine. On Wednesday my RV tech is going to test the start capacitor... all this is complicated by the warranty issue. I just want to start over with a new air conditioner!