I have a Northstar 8.5 Arrow mounted on my 2015 Chevy 2500, 4X4, long bed, single rear axle. A friend told me that when the truck motor is running that it is supplying power to the camper's on boar...
I would believe manual says things like that. I know that modern 300 pages manuals are not favorable books to read, but sometimes worth it. If not, contact the manufacturer. I can't count how many times I informed dealers about vehicle features. Those people are experts in price gouging, not in technical knowledge.