The RT electrical is 30 amps. So plugging it in to the 110V at the house it is pulling how many watts with nothing pulled from the house electrical to the vehicle (microwave, clock, radio, etc.)? :) ...
Not sure if this is the answer you're looking for, but when I connect up my Roadtrek 210P with nothing running in it I see a 2-3amp draw. This is when the batteries are fully charged, when they're down a bit the draw goes up to about 10amp.