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<p class="MsoNormal">Ahh the can of worms get opened.<o:p></o:p></p>
<p class="MsoNormal">In our conversation Willian brought up the same points.<o:p></o:p></p>
<p class="MsoNormal">All true, but the white paper was required by legal (CYA).<o:p></o:p></p>
<p class="MsoNormal">I think getting the new unit listed also came into play.<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org>
<b>On Behalf Of </b>Maverick Brown<br>
<b>Sent:</b> Friday, January 21, 2022 9:29 AM<br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Subject:</b> Re: [RE-wrenches] Mixing Outback FM100 CC with Fm80 or 60.<o:p></o:p></p>
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<p class="MsoNormal">Using that logic, wouldn\u2019t the inverters and batteries also be exposed to 300Vdc? And the MX60 would also be at risk for exposing the inverters and batteries to 150Vdc under similar failures?
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<p class="MsoNormal" style="margin-bottom:12.0pt">If that\u2019s the only limiting factor, I\u2019d like to take back a couple AC Coupling arrangements I have made for past Radian expansions. ;-) <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black">Maverick Brown<br>
Off-Grid Solar Commander since 2006<br>
<b>Maverick Solar Enterprises, Inc.</b><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"> \u2022 Solar Commander Remote Power</span></b><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"> \u2022 SunFlow Systems Cathodic Protection <br>
</span></b><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black"><a href="mailto:maverick@mavericksolar.com">maverick@mavericksolar.com</a><br>
512-460-9825<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On Jan 21, 2022, at 11:15 AM, Tuss, Lones <<a href="mailto:lones.tuss@enersys.com">lones.tuss@enersys.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">\ufeff <o:p></o:p></p>
<p class="MsoNormal">Hi William<o:p></o:p></p>
<p class="MsoNormal">Thank you for taking my call.<o:p></o:p></p>
<p class="MsoNormal">I believe the reason we do not recommend mixing the FM100 and the fM60/80 is.<o:p></o:p></p>
<p class="MsoNormal">If the FM100 were to short out pv input to output you could expose the 150 volt rated dc breakers on the
<o:p></o:p></p>
<p class="MsoNormal">FM60/80 to 300 vdc. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>>
<b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Thursday, January 20, 2022 10:54 PM<br>
<b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<b>Subject:</b> [RE-wrenches] Mixing Outback FM100 CC with Fm80 or 60.<o:p></o:p></p>
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<b><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#212121">CAUTION:</span></b><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#212121"> This email originated from outside of the Company. Do not click links or open attachments
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Friends:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">I am sure many of you are familiar with the somewhat new Outback FM100 charge controller. It allows PV input at up to 300 volts and battery feed at up to 100 amps. It has
a built in GFDI fuse, much like the old XW--now branded I think Conextant-- charge controller.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Outback recommends against installing an FM 100 in an installation with FM60s or FM 80s. Here is the
<a href="https://protect2.fireeye.com/v1/url?k=31323334-501d2dca-31313abf-454455534531-4df62a772b14c6eb&q=1&e=d5f26548-4212-48c3-91e9-e4b3dde4c8e7&u=https%3A%2F%2Foutbackpower.com%2Fdownloads%2Fdocuments%2Fappnotes%2Ffm100_fm80_app_note.pdf">
tech note</a> that gives that recommendation. Below is one paragraph from that tech note.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><i><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">There is little benefit to mixing an FM100 with an FM60/80. If circumstances require it, this application</span></i><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><i><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">note will explore an option.</span></i><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Note the language is pretty dang squirrely. Let\u2019s parse the above paragraph:</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Sentence 1: I submit there may be many scenarios where there is significant benefit: Like if you already have an FM60/80 and you want to add more
PV and you want to enjoy the benefits of an FM100, such as higher input voltage or higher output amperage, and not have to fork out an extra $1000 to replace a working FM60/80. Or you installing more than one PV array, one array nearby and/or smaller and
one further away or larger, and you don\u2019t want to spend close to $1,000 to charge control the nearer array.
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Sentence 2: They are offering \u201can option,\u201d not the only option. I believe there are multiple options. In a mixed installation, the FM100 can rely
on its internal GFDI fuse and the FM60 or 80 can rely on the old familiar GFDI breaker with the 1 or 0.5 amp pole connected between the negative and equipment grounding system. Alternatively, Midnite sells a 300 volt rated, multi-pole GFDI breaker that could
be shared by an FM100 and an F60/80. It says right in the FM100 manual that you can use external GFDI devices (page 14).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">I am not at all clear as to what problem there is to mixing the two generations of charge controllers. I reviewed the NEC. There is no indication that thou shall not mix
GFDI styles.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">If anyone has a definitive reason why or why not to mix these models of Outback charge controllers, I would be most interested.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Most Sincerely,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">William Miller</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Miller Solar</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">17395 Oak Road, Atascadero, CA 93422</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">805-438-5600</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><a href="https://protect2.fireeye.com/v1/url?k=31323334-501d2dca-31313abf-454455534531-18562c478088e59c&q=1&e=d5f26548-4212-48c3-91e9-e4b3dde4c8e7&u=http%3A%2F%2Fwww.millersolar.com%2F">www.millersolar.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">CA Lic. 773985</span><o:p></o:p></p>
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