I put a 5k Gen in our front cargo space and also ran a fuel line with a marine outboard fuel connector down and out the front part of the front cargo space, I bought a 7gal portable marine fuel tank and between the tank connector and the Gen fuel connector I made a 6' fuel line with the female ends.... So weather driving or stationary I could run the Gen and AC units....This would cooldown the RV when we pulled into or camp site, especially nice in HHH weather..A 5k Gen could run both AC units with no problem...