Originally Posted by clr
I agree with fonzie here you will need a cable adapter to connect the gen to your RV. The gen looks to have a 30 amp out twist lock type connector so the adapter fonzie talks about would work great. The 30 amp twist lock connector on the gen will only use three pins for 120v the forth pin is if you need 240v for some application. The RV type adapter will only use the three leads so only 120v. Of course you will be limited to 30 amps on this arrangement although you can use your 50 cable directly.
Clr, it should work just like it would at the campground on a 120/240 volt split phase outlet as he has a 50 amp RV. It will use BOTH hots, the neutral and the ground. The panel in the RV keeps the legs separate (thus no 240) and utilizes EACH hot leg separate for 120 volts only. It's explained in the link I posted above.
The OP will be limited to a max of 7500 watts, and that could be peak watts, not running load watts. A campground 120/240 volt 50 amp split phase service is capable of providing 12000 watts.
However, when you are plugging a 30 amp camper into a 120/240 split phase outlet, then what you stated is true. The adapter in that scenario, only utilizes one hot leg, the neutral, and ground.....and the second hot leg is basically capped off inside the adapter.
EDIT: This schematic should help in understanding how the two hot legs are separate in the RV and thus remain 120 volt. You would need both hot legs running to an outlet or appliance in the rv for it to be 240.
The problem is when someone hooks to a 240 outlet that is wired in a way that the allows the second 120 volt leg to go thru the normally neutral wire.