I have a somewhat similar, but different inverter issue - maybe. We have a 2007 Fleetwood Revolution LE with a Freedom 458 remote panel. We recently built a new shop to store it in (yeah) with a 50A service. Prior to that we only had 30A service to plug into. The remote panel used to always have solid lights showing what was coming in and what appliances were supported. Now the panel just flashes vertically up over and over. It seems weird. We have only dry camped once since this started and our batteries got really low over night just running the heater. This was not an issue previously, we could watch tv, run the heater, whatever and not lose battery strenght overnight. Not sure what is going on. Maybe the flashing is normal at 50A, but it doesn't seem normal. It is all confusing. Any thoughts from you advanced members?