Here's what the OP actually said;Not ones with a 30a main, they don’t. OP said he has a 22’ 30a coach, not a 50a. It’s single AC, I guarantee it.
"The goal is to charge at 3.6 kw since I connect the RV to 50 amps and only use about 30 amps to run all the RV functions. I want to use the remaining 20 amps to charge the car.
His rig is a 50 amp rig, not a 30 amp. He only said he uses about 30 amps on the 50 amp connection.