<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
We have a multitude of these same issues with the TS40-A-F. We followed every new guideline from Tigo in order to avoid corrupted signals but still had issues. After a hot breezy day in NJ last year caused a Tigo failure to spread the roof caught on fire
and caused millions in damage. Thankfully no one was injured. We spent the rest of 2024 pulling 6 MW's of Tigos off of other roofs for this customer. I have heard multiple stories of similar issues for many very experienced installers.</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
David Buckner</div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
SES</div>
<div id="appendonsend"></div>
<div><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<hr style="display: inline-block; width: 98%;">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> on behalf of Nick Lucchese via RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Sent:</b> Wednesday, November 19, 2025 12:11 PM<br>
<b>To:</b> william@millersolar.com <william@millersolar.com>; RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Cc:</b> Nick Lucchese <lucchesesolar@gmail.com><br>
<b>Subject:</b> Re: [RE-wrenches] Tigo TS4-A-F </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="background-color: rgb(255, 235, 156); padding: 2pt; border-width: 1px; border-style: solid; border-color: rgb(156, 101, 0);" id="x_footer">
CAUTION: External Email.</div>
<div style="direction: ltr;">Appears that Zonna still has quite a few in stock. Feeling foolish to purchase more after having a TS4-2F fail into a pile of molten plastic and ruin a 405 watt bifacial module that I can no longer find a replacement for. What other
options do we have for small DC coupled arrays on residential rooftops though? Not the most inspiring times to be installing rooftop PV. Hopefully I'll start having better luck with the single module units. Numerous times I've had units become bricked and
not pass module voltage but this is the first time I've had this type of catastrophic failure that also inconveniently cost me the module.</div>
<div style="direction: ltr;"><br>
</div>
<div style="direction: ltr;">Nick</div>
<div style="direction: ltr;"><br>
</div>
<div style="direction: ltr;"><br>
</div>
<div style="direction: ltr;"> </div>
<div><br>
</div>
<div style="direction: ltr;">On Mon, Nov 17, 2025 at 7:10 PM William Miller via RE-wrenches <<a class="OWAAutoLink" id="OWA8c507c37-2548-2c0d-e50c-a1bd2f45ca9e" href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:</div>
<blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left: 1px solid rgb(204, 204, 204);">
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">Friends:</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">I am having trouble locating these RSDs. Very few vendors appear to have these and I can’t get any to call back and verify they have them. I
can’t get Tigo to return my calls. Does anyone know if these are discontinued?</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">What are the rest of you doing for rapid shutdown? I don’t 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 style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">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 style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">All input is welcome an appreciated. Thanks in advance.</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;">William</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Verdana, "sans-serif"; font-size: 12pt;"> </span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Arial, "sans-serif"; font-size: 12pt;">Miller Solar</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Arial, "sans-serif"; font-size: 12pt;">17395 Oak Road, Atascadero, CA 93422</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Arial, "sans-serif"; font-size: 12pt;">805-438-5600</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Arial, "sans-serif"; font-size: 12pt;"><a style="margin-top: 0px; margin-bottom: 0px;" class="OWAAutoLink" id="OWAc044e958-87e4-510c-7216-8bf3928995ff" data-auth="NotApplicable" originalsrc="http://www.millersolar.com/" href="http://www.millersolar.com/">www.millersolar.com</a></span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Arial, "sans-serif"; font-size: 12pt;">CA Lic. 773985</span></p>
<p style="margin-top: 1em; margin-bottom: 1em;"> </p>
<p style="margin-top: 1em; margin-bottom: 1em;"> </p>
<div>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a class="OWAAutoLink" id="OWA8f9ba121-0685-0cf3-0d3a-4914af1f6881" data-auth="NotApplicable" originalsrc="http://re-wrenches.org/" href="http://re-wrenches.org/">
http://re-wrenches.org</a><br>
<br>
List Address: <a class="OWAAutoLink" id="OWA45a6da8e-86f4-73ed-0084-fe58c79990b1" href="mailto:RE-wrenches@lists.re-wrenches.org">
RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a class="OWAAutoLink" id="OWAfe98ec74-c70a-1371-6725-5f936a033601" data-auth="NotApplicable" originalsrc="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
</div>
<div><a class="OWAAutoLink" id="OWA4621a256-4c32-32d1-8c3b-50d4768e2838" data-auth="NotApplicable" originalsrc="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
</div>
<div><a class="OWAAutoLink" id="OWA0c27bd92-f7b0-2f6e-11c0-6c0bc65bee9a" data-auth="NotApplicable" originalsrc="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a class="OWAAutoLink" id="OWA7fc2f512-4b5f-dda4-a175-8e474ab7c09e" data-auth="NotApplicable" originalsrc="http://www.re-wrenches.org/etiquette.htm" href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a class="OWAAutoLink" id="OWAe0fc9ab7-d0c3-f288-a8e2-b2ebd84b10d8" data-auth="NotApplicable" originalsrc="http://www.members.re-wrenches.org/" href="http://www.members.re-wrenches.org/">http://www.members.re-wrenches.org</a><br>
<br>
</div>
</blockquote>
</body>
</html>