[RE-wrenches] Outback Charge controllers resetting to default settings

[Zeke Yewdall]

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 <zeke at darkforestsolar.com>
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
zeke at darkforestsolar.com
303-523-3592
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