It took a second try to get the unit to charge properly (I think) and the batteries are full. First try resulted in the converter fan running too long. It is difficult to tell what the charger is doing without some sort of indicator. I now have the camper plugged in to run the frig. Our first trip will be soon and I want it cold.
Installing a battery disconnect is my next objective. The camper should have come with one in the first place. I need to read about running the converter without a battery connected. Seems I remember it might be a bad move. If I could just retire tomorrow all would be well…