I havew2 fuses for the solar controller, they are located in the passenger side rear electrical compartment. I had low amperage charging when I first bought our rig, turned out that the 2 Kyocera solar panels were bad. Contacted them and it turned out that they were both part of a extended warranty and were replaced free of charge.
You might try resetting the RC7 remote, can't remember the specific procedure but it is in the manual.