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

[Tyrone Houck]

Hmmm. I don't know..the ones I've seen do it never actually lost power. I
had two at the same site do it and my intuition was that the mate was
somehow responsible.




On Sun, Jan 11, 2026, 8:34 AM Zeke Yewdall via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> One of my customers thinks it happens after the charge controller loses
> power due to a battery BMS shutdown.  And the other one, it did happen on
> the charge controller that was disconnected for a while for a new array
> being wired in.  So... I'm wondering, how does the FM100 store programming
> data?  Is it in some sort of memory that requires power?  And if so, does
> it have a coin battery in there or how does it remember the settings when
> battery power is removed?  I know this is a common thing in old ham radios
> of a certain vintage, that they have an internal coin battery to remember
> settings and after 5 or 10 years, it has to be replaced.  The Midnite
> Classics also have the coin battery in the display... so, does the FM100
> have something like this?
>
> Zeke
>
>
> From: Tyrone Houck <tyronehouck at gmail.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches]
> Message-ID:
>         <CAEqH54=
> DNxM-buzrijftd+ZpnmkPe_haQy_7539RyxwcFDpSkA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I have had that happen before on at least 3 different occasions.
> Specifically with the fm100. Totally random and  couldn't come up with a
> logical explanation. I just reprogram and roll with it...always seemed odd
> though.
>
>
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