Just to let anyone that is interested, used my two onan 4500 on a parralel on my 2015 solitude grand design his weekend. It worked like a charm, was able to use both air conditioners plus everything else, my friend even plugged in on my 110 and didn't skip a beat. Running time was about 7 hrs before fill up on gas. Having said that has anyone install a rear hitch on rear of this type trailer ? I have a adjustable curt, just asking before i start in case i need to know for a smoother install, lastly does this unit have box on roof for instalation of a wineguard mini max satilite?