I did this on a full-size truck with a flat hitch, but on the mid-size truck the hitch tray was too low so I bought a 8 inch rise/10 inch drop hitch for receiver and put the gen tray on the riser hitch. Now I have ground clearance for any steep drives or off-road camping.
It is solid, I can stand on the tray, so plenty strong for the generator.
On the other truck I ran a heavy electrical cord through the truck frame so there was always power routed, no cords on the ground, or tangles... I will add the cord to this one soon.
Side view new tray.
Front view. Gen has a water-proof cover for travel, not pictured.
just need touch up paint.
I added the "handles" bc I was able to forceably pull the gen out sideways, so the handles are making the sides taller to prevent theft, and also make great balanced handles as the tray itself is heavy.
The generator is a Ryobi 2200, and will run a 9200 A/C unit just fine. It will run the AC for 10.5-11.5 hours on a tank.
Here are the original build pics of old design. I kept the tray since the locking mechanism is pretty involved to remake.
Grandfathers old rusty metal from who knos where or when...
under side, painted
under
lock mech
locked
padded steel strap to lock it in. Tight, snug fit. I have a custom water-proof cover for it also.