Question about running the Cabin AC while traveling

Generally, running the dash AC is sufficient for you and your co-pilot. If others in the rear need it, it's OK to run the RV generator to run the roof AC unit while underway. RV generator may consume one gallon of gas per hour and will shut off/run out of gas when your gas tank level falls to about 1/4 full. If you shut off the roof AC, you'll need to wait 10 minutes to restart it. AC Compressor has a delay to prevent damage from restarting too soon.