OK, so then what do we know? If the diagram is accurate:
1) With the camper on AC power, you will always have power inside the camper, no matter what position the kill switch is in. Is that the case for you? Is that the case for all FWC from the factory?
Yes, Also If you have a 2 way refg it will switch over to run on 120 volt AC. The Iota charges the battery only with the kill switch in the on position.
2) If you unplug the AC power, and leave the kill switch OFF (is that pushed in?) then if the LOAD setting in the MPPT is set to OFF, then you should have no power in the camper. Is that the case for you? Is that the case for all FWC from the factory?
Off for the kill switch is pushed in, no power DC in camper. FWC has gone weird with the load wire to fuse block and can't say if this is standard.
3) With kill switch OFF and the LOAD setting in the MPPT set to ON, you should have power, even with no sunshine falling on the solar panels, you will have power because it goes from the battery through the MPPT to the LOAD terminals. (That sounds goofy to me.... because it means the KILL switch doesn't kill all power). (Same questions).
Yea, goofy to me too. Don't know how FWC has been wiring MPPT to battery. But should be a direct from MPPT to battery, and the ground, so you can always receive charge to the battery from solar when the kill switch is off or on.
4) Per your troubleshooting above, if you disconnect your LOAD terminals, and the KILL switch is OFF and AC is not plugged in, you should have NO power in the camper. (Same questions)
Yes that isolates the battery to the camper to prevent draining down with small loads, like propane detector.
Any other testing you can report on would be good.
Edited by pvstoy, 27 March 2020 - 09:34 PM.