Well I guess it's pretty much official.. lol. don't look like this HF 3200/4000 generator can be wired in parallel. With thousands of these sold I really thought someone might have figured it out. Anyway..
I'm going to run as is. With the 20amp breakers it will run one of my RV air units with no problems. Got about 30 hrs on it and it's running well. Easily get 10 or 12 hrs on a tank of gas running one roof air. Enough power to run one air and second unit on fan as well as some lights.
I also have a 50amp RV so I can balance it a little buy running the air on one side and the other things on opposite side. Just takes some planning.
I would love to try the HF inverter generator they have out now. Looks like a good RV unit for the money. Only thing I don't like is the low run time due to small tank. Wonder if they have a fuel pump.. or maybe another project.. :@
So.. Although I think for an RV a 120 volt only unit or a switchable unit would work much better then the HF 3200/4000.. I must say so far I'm impressed with this HF generator. Well worth the money and with a 2 year warranty you really can't go wrong. If budget is a concern I would recommend taking a look at these generators. lots of folks complain about the HF generators and in their situation maybe rightfully so, but I can tell you I would consider the HF brand again.
on to the next project.. thanks all