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.)? :) ...
Go buy a KillAWatt which will measure how much power a device uses. Plug it into your house and then your mh into the KillAWatt. It will show you how much power you mh is using just sitting there. You can then turn on each appliance and determine its load.