Who offers a 5th wheel factory installed Geni?

Even though I have a built in gen on my Raptor, I also use, because I already have it, a Honda 2000i gen that we use just for coffee maker, music soundbar and general 120v stuff along with charging the batteries. If the temps outside are mild, I'll run it all night with a couple fans on instead of the Onan, only because the Hondas use very little gas. Once we start full timing the Honda will go away.