I have a 2004 bounder 39z. I discovered that the inverter/converter is not charging batteries. I discovered that a add on cooling fan was mounted on the outside of the unit and had duct tape put around it and was wired direct. The fan ran all the time. I installed a switch between the ground and fan so I could turn off the fan when RV is not in use. Also the 25 amp round button keeps tripping when the generator is running and also when hooked to shore power. With all this said I gave access to a XANTREX Freedom Marine 20 charger / inverter 2000 watts. Is it possible to switch out the old inverter/converter for the XANTREX Freedom Marine 20 charger / inverter ?