<div><div dir="auto">I meant to write: \u201coptimized PV in front of MPPT inputs,\u201d but I think you know what I meant. </div></div><div dir="auto"><br></div><div dir="auto">Let us know how it goes. </div><div><div dir="auto"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com" target="_blank">www.millersolar.com</a><br></div></div></div><div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 18, 2025 at 9:49\u202fAM Christopher Warfel <<a href="mailto:cwarfel@entech-engineering.com" target="_blank">cwarfel@entech-engineering.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div>
<p>I would have thought so. I can just see them saying tweak this,
no tweak that. But I going to have to assume their statement is
valid. I hope to fire it up in the next week. My first EG4 so I
need to learn how to commission this first. </p>
<div>On 11/18/2025 10:55 AM, William Miller
wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">Christopher:</div>
<div dir="auto"><br>
</div>
<div dir="auto">Thank you. </div>
<div dir="auto"><br>
</div>
<div dir="auto">How is it that one can put optimized inverters in
front of a standard MPPT algorithm? Don\u2019t they work against
each other?<br clear="all">
<br clear="all">
<div dir="auto">
<div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><br>
William Miller<br>
Miller Solar.com<br>
805-438-5600<br>
<a href="http://www.millersolar.com" target="_blank">www.millersolar.com</a><br>
</div>
</div>
</div>
<div><br>
</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Nov 18, 2025 at
5:47\u202fAM Christopher Warfel via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>I recently got the TS4 A-Os when I thought I ordered
the TS A Fs and was also worried about the possible
fighting between the two MPPT devices. As was under the
gun for weather and end of year, went with the AO's.
Have you tried emailing <a href="mailto:support@tigoenergy.com" target="_blank">"support@tigoenergy.com"</a>?</p>
<p>I went through AI and found this document:</p>
<p><br>
</p>
<p><img src="cid:ii_19a9846fdfbbfdb42cd1" alt="" style="width:932px;max-width:100%"></p>
<p><br>
</p>
<div>On 11/17/2025 11:44 PM, MDElectricSolar via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"> We are having no issues sourcing
these from our primary vendor, Greentech.
<div><br id="m_-201458486971919911m_-5850604190659333419m_7631726865360386109lineBreakAtBeginningOfSignature">
<div dir="ltr">
<div>Michael D Nelson</div>
<div>MD Electric & Solar, Inc.</div>
<div>707-684-0064 mobile</div>
<div>707-884-1862 office</div>
<div><a href="http://www.mdelectricsolar.com" target="_blank">www.mdelectricsolar.com</a></div>
<div><a href="http://www.facebook.com/mdelectricandsolar" target="_blank">www.facebook.com/mdelectricandsolar</a></div>
<br>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Nov 17, 2025, at 7:11\u202fPM,
William Miller via RE-wrenches <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank"><re-wrenches@lists.re-wrenches.org></a>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">\ufeff
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Friends:</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I
am having trouble locating these RSDs. Very
few vendors appear to have these and I can\u2019t
get any to call back and verify they have
them. I can\u2019t get Tigo to return my calls.
Does anyone know if these are discontinued?</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">What
are the rest of you doing for rapid
shutdown? I don\u2019t trust Alps: I have heard
too many horror stories. It seems the form
factor is too small to contain arc
suppression measures.</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Somewhere
I saw as an alternative the Tigo TS4-A-O.
These are optimizers. I worry these will
fight with the MPPT algorithm in the
inverter or charge controller. There is
also the TS4-A-S which has shutdown and
monitoring.</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">All
input is welcome an appreciated. Thanks in
advance.</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">William</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Miller
Solar</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">17395
Oak Road, Atascadero, CA 93422</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">805-438-5600</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><a href="http://www.millersolar.com/" target="_blank">www.millersolar.com</a></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">CA
Lic. 773985</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
</div>
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<pre cols="72">--
Christopher Warfel, PE
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
(401) 447-5773</pre>
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<pre cols="72">--
Christopher Warfel, PE
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
(401) 447-5773</pre>
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