In my PT I think virtually everything is on one of the two inverter circuits with the exception of a socket by the bed. The other circuit has the microwave. If the TV is on the other circuit, I've never noticed, but one of the two outlets in the TV box definitely isn't.
We constantly tripped the circuit with all the lighting and other stuff on it, so when we replaced the Xantrex with a Magnum I located the needed subpanel above the water pump box so I could reach it easily and no longer needed to crawl into the coach to reset it.
Another thing we discovered when installing the Magnum, however, is that all the circuits in the coach appear to have been wired with 12 gauge romex. The fact that one circuit was 15A and the microwave one was 20A appears to have been more because of the Xantrex configuration rather than indicative of how the coach was wired. In fact, since we had purchased 15A and 20A breakers to use with the Magnum, we reversed them so the main circuit has the 20A (since 12 gauge wire is fine for that) and the 15A breaker is now on the old microwave circuit, which is the one that we had rerouted to serve the residential fridge.