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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif">In the Classic the coin battery does not affect the solar programming of the unit, only the time and date. Did the FM have a date/time setting? I don\u2019t recall for sure, if not it likely does
not have a battery in the display. If only we could have boB back, he would know.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Sue Stankevitz</span><span style="color:black"><br>
<a href="https://www.midnitesolar.com/index.php">MidNite Solar, Inc.</a><br>
</span><span style="color:black">(360) 403-7207 (XT122)</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org>
<b>On Behalf Of </b>Tyrone Houck via RE-wrenches<br>
<b>Sent:</b> Sunday, January 11, 2026 11:48 AM<br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Cc:</b> Tyrone Houck <tyronehouck@gmail.com><br>
<b>Subject:</b> Re: [RE-wrenches] Outback Charge controllers resetting to default settings<o:p></o:p></span></p>
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<p class="MsoNormal">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.<o:p></o:p></p>
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<p class="MsoNormal">On Sun, Jan 11, 2026, 8:34<span style="font-family:"Arial",sans-serif">\u202f</span>AM Zeke Yewdall via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">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?<o:p></o:p></p>
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<p class="MsoNormal">Zeke<o:p></o:p></p>
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<p class="MsoNormal">From: Tyrone Houck <<a href="mailto:tyronehouck@gmail.com" target="_blank">tyronehouck@gmail.com</a>><br>
To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: Re: [RE-wrenches] <br>
Message-ID:<br>
<CAEqH54=<a href="mailto:DNxM-buzrijftd%2BZpnmkPe_haQy_7539RyxwcFDpSkA@mail.gmail.com" target="_blank">DNxM-buzrijftd+ZpnmkPe_haQy_7539RyxwcFDpSkA@mail.gmail.com</a>><br>
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I have had that happen before on at least 3 different occasions.<br>
Specifically with the fm100. Totally random and couldn't come up with a<br>
logical explanation. I just reprogram and roll with it...always seemed odd<br>
though.<o:p></o:p></p>
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