For the first time I saw yesterday a new message on our Magnum inverter's remote: Backfeed Fault. It's not in the manual anywhere.
The red Fault lamp was on, and the remote's switches didn't respond, but nothing else was obviously wrong. The coach had been parked for months with main switches off and only solar power input and stable at 13.2-13.4v. Now there was a voltage readout of 12.2 v., not exactly an optimum number.
What caused the change I have no clue. I contacted Magnum and they didn't offer a causal explanation, but the fix was simple enough - just press and hold the small on/off/reset button on the inverter's front until the green lamp flickers and then turn on the inverter power on the remote. I plugged in the coach to AC power. It immediately went to Bulk Charge. All seems well again, but who knows what tripped the unit.
This is info for anyone who runs into similar issues in the future.
Joel
