Converter putting out 16.5V, some appliances don't work.

2oldman wrote:
Would you mind humoring us and explaining WHY you are disconnecting the batteries?

Sure. There is a battery disconnect switch next to the monitor panel, hot water switch, etc. Its used to disconnect the 12V appliances from the battery to prevent drain when not being used for an extended time. We shut this off when not using the RV for several days to prevent parasitic drain on the battery. We are not physically disconnecting the battery per se.