This is what I do, I have a long "extension cord" - 50' or so, of whatever gauge can carry 50A, with giant nema-50 plugs on both ends. I may be mistaken about the amp rating, but I'm pretty sure it's 6AWG. My whole house generator is a Ford dual fuel 11kW I have in an air conditioned shed. I only have to shut off my water heater, everything else runs fine.