Same thing happen to me. First thing I would do is check the inverter to make sure it is turned on. There is a switch on the inverter itself.
I had been working in the basement and accidently hit the switch.
If that doesn't work unplug the control wire (looks like a phone cord) and let the inverter reset itself.
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi