I had a dealer install a second shore power cord receptacle in the rear wall of our Wildcat. Also had a receiver hitch put on the rear so that if we want to take a generator along I can set my Generac 4K generator on a receiver hitch platform and plug it into the rear power receptacle. The generator is only 30amp where as the Wildcat is 50amp but we dog bone down the cord. It will power everything except both a/c at the same time.
2018 Berkshire XL 40B
Past RVs: National Pacifica 40', Kenworth T300 Toterhome, Jayco Class C 32'. American Eagle 40',
American Eagle 40', Bounder 38' tag axle
The first thing I asked my dealer about was a “generator option.” He told me only Toy Haulers had a generator option. He thought it was because the Toy Haulers had an onboard gasoline tank that could be used to power the generator. Using the meager LP supply won’t give enough runtime capacity for a quality setup.
I miss the onboard generator my slide-in pickup camper had. Just push the button to start the generator without any power hookup hassles. The many advantages of an onboard generator are obvious to most RVers.
Like Torch, I opted for a pair of Yamaha EF2000iS generators because, at about 50 lb. each when fueled, they are light enough to move around and big enough to power one AC. I only need to run one of the pair to watch TV, charge the RV battery, run the furnace (overnight) and even power the microwave, which accounts for almost all of my generator needs. I store mine in the 5-th wheeler’s basement safe and sound while out of the weather when not in use; I find this another plus. I considered a Yamaha EF3000iSEB because of its electric start but it ends up weighing about 175 lb. when fueled, just too much for me to manage over the long term.
The external generators are much cheaper than the onboard generators too but they are a hassle to operate when compared to an onboard generator with its transfer switches and push-button starting from inside the RV.
You can find really cheap generators that are really loud. I believe the Yamaha and Honda inverter generators are the best choice but there are modestly priced inverter generators that may be just a little too small to power the 15,000 BTU AC. A pair of Honda or Yamaha generators hooked in parallel work just fine.