You can open the door of the converter/charger unit and the model info should be displayed. You also should have a folder that came with the trailer showing all of the added appliances etc.. This will have one for the converter/charger unit as well... My folder was stuck inside where the hot water heater was located. They also come inside the kitchen drawer sometimes as well.
Its really a good idea to learn all of the things associated with your trailer while at home. Finding things out up in the high country of Northern AZ is not a good place to go looking for things when troublshooting failures. This will free you up to enjoy the RED ROCK canyons and mountains around the Sedona area...
Roy Ken