Two of the flaws with the built-in generator that I don't recall being mentioned are the lack of manual starting capability and adding weight in the wrong place. You have been camping in very cold weather and ran the heater all night to stay warm and keep the pipes and tanks from freezing in your four season camper. The generator won't start because the batteries are too low from that thirsty heater fan motor. You now have to start the truck engine to recharge the camper batteries, assuming you have a battery isolator. Not a problem with the blue or red portable units. Adding 125lbs on the rear of the camper where most built-in generators are located also does not make sense. I added a front hitch, modified a hitch carrier and securely carry my Blue 2000 on the front of the truck where I have extra weight carrying capacity. A cord custom made for this purpose quickly provides power to the camper to run the 9200 AC unit. If I need power for a project away from my camper, or need to have my generator serviced, much more convenient to own a portable unit overall IMHO.
