Before you go through all of the trouble to take it out of the boat try a complete cold boot of the system. I had a problem with mine a couple of years ago and talked to Xantrex. They of course told me to send it into a service
center, but I was talking to a tech and asked him how much intelligence was built into the system. His response was "what". I rephrased it and asked him if the unit was controlled by a microprocessor, to which he responded "Yes it is". I asked him if a complete power off reboot might solve the problem to which he said maybe. He told me to do that I needed to disconnect the battery
, turn on the inverter
, and attach it to a resistive load for at least 30 minutes to drain all power from the capacitors. I used my water
heater element as the resistive load. I reconnected the 12 volts after 30 minutes, turned it on, and it's worked fine ever since. It's certainly worth a try.