I'm sure this has been beat to death but, is it more efficient to run the dash air or to run the generator and one roof air.This is on a gas Ford v-10 and a 7000w Onan. Thanks for any input.
I doubt if you could really measure any appreciable difference, so we do what we need to do to be comfortable.
Many people don't give their generators the "exercise" specified by the manufacturer anyway, so running the generator to power the AC is a good side benefit if you don't use the generator too often. Too few hours on the generator is probably worse than too many.