on board generator

Built in has it's perks as mentioned above..I have a built in for a 21ft class C and do like it for some stuff but I always revert to my smaller Honda 2K for boondocking and charging batteries because it consumes much less fuel than the Onan 4k and ofcourse,it's quieter.

They both have there place.If I had to choose it would be my Honda 3k mounted to the trailer or motorhome..Best gen set I have ever owned.