Kay,
You'll get used to this, but your coach has 2 mostly separate electrical system.
12 volts for the lighting, water pump, and refrigerator and furnace electronics. (basically everything that you "have to have" is 12v and will run off your coach batteries)
The 110v system runs "extra stuff", air condition. Microwave. Entertainment.
You may have an inverter but that's another subject.
The 110 also runs your battery charge when you are plugged in. The draw of the battery charger may be an issue when you go to vacuum if you are plugged into a 15 amp circuit.
