When you mentioned IOTA in your first post, I figured it was a pre-2007 model. The fact that it is a remote unit is good, much easier to R&R if it comes to that. Also, the IOTA is a 2-stage unit, most of the newer Jayco converter/chargers are 3-4 stage non-IOTA products......, much better for battery life.
"If" you find that the IOTA is still good, you can make the unit a 4 stage unit simply by adding a IQ4 Smart Charger (about $25)..., plugs into the back of most IOTA's (not the ones that mount to the back of the Load Center). Look for the dual voltage jack on the back of the IOTA.