I think a lot depends here on on where and how you camp. Our 2000 Yamaha had no problems with the AC in the Tetons and Glacier. Last week in Missouri a 90 minute run time would have left us sweltering in 90+ temperatures.
I am not sure I am following. You mention load shifting back to the genny, but I thought you didn’t have a genny?
Steve and Andra
2012 F350 6.2 gasser SRW LB
Fab Fours front and rear in case we run into a rhino
2019 Northstar Laredo SC