I inadvertently did a test on a large bank of FM100's yesterday -- had to shut a bank of 15 of them off for doing some rewiring on the main battery busbars. They were probably out of battery power for 18 hours or so, and overnight so no PV power, before we turned them back on the next afternoon After turning them back on, 10 of the 15 had reset to factory defaults. But not all of them....
Zeke On Mon, Jan 12, 2026 at 3:18 PM Zeke Yewdall <[email protected]> wrote: > We did a test on one of them today. FM100 with a Mate3s, no internet > connection. We powered it down (PV breaker and battery breaker) for > about two hours while redoing some battery wiring. After powering it back > up, we checked it, and all of the charge settings had gone back to factory > defaults again. > > Zeke > -- Zeke Yewdall PV Engineer NABCEP #031508-89 [email protected] 303-523-3592
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