Inverter question

Doesn't an inverter convert DC to AC? Doesn't the Nomad need a transformer to run on AC? Doesn't that mean that you would need to transform that AC back to DC before you could run it? Have you really thought it over?

The Nomad 2 can either be plugged into a 120 wall receptacle or run off a 12 volt battery. I would sooner use it in the back of the vehicle plugged into an inverter instead of perched on the rad or a small table I would have to bring along.