Over the course of almost 4 years with our 29D, we have never run the generator while traveling down the road--no need to. The dash AC cools the unit sufficiently (as does the heater) while driving, and if water is needed, use the battery operated pump. We typically run the refrigerator on propane while traveling, but it will stay cool if turned completely off for the 6 hours or so of daily driving. Also, we turn the hot water heater on first thing each morning, and the water will stay hot for several hours. If we need to charge cell phone or computer with AC while driving, we plug into the surround sound outlet which works off the inverter (I added a power strip to the surround sound outlet, as it is the only inverter powered outlet from the factory.) As I stated in another post, I added a receptacle on the side of the bed for my CPAP for dry camping, but we have used it with the inverter to cook with the crock pot while going down the road. Bottomline is we've never needed the generator while driving.