<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.apple-style-span
{mso-style-name:apple-style-span;}
span.EmailStyle20
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>I just had four defective 390-watt 72-cell modules that were bad out of the box. I immediately thought it was an optimizer issue because in eight years, I’ve never had four modules go bad, let alone four from one box.<br><br>My distributor put me in contact with Q-Cells and he was great taking info just today so we’ll see what the warranty process looks like. His info is <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black;background:white'>Ben Kuttesch<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black;background:white'><a href="mailto:Ben.kuttesch@us.q-cells.com">Ben.kuttesch@us.q-cells.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black;background:white'>615-438-4805<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I hope this is not a precursor to lots of in-field warranty work for diodes that fail prematurely…because unlike SolarEdge and Enphase there is no “truck roll” reimbursement from what I can tell.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Scot Arey<o:p></o:p></p><p class=MsoNormal>Solar CenTex<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>Jeff Wongstrom<br><b>Sent:</b> Friday, November 6, 2020 11:38 AM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> Re: [RE-wrenches] Bad Diodes in QCells?<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Adam,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I had a similar experience with four QCell modules on two different jobs. Underperforming modules with low voltages at installation. Q.Peak Duo 325. Replaced under QCell warranty by credit to distributor. No labor compensation.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Jeff<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Jeff Wongstrom<br><img border=0 width=113 height=50 style='width:1.177in;height:.5208in' id="_x0037_DAB492D-2142-4D86-AE42-2359E07E6DE3" src="cid:image001.jpg@01D6B433.01BF89F0"><span class=apple-style-span><o:p></o:p></span></p><div><div><div><div><p class=MsoNormal>NABCEP Certified PV Installer<o:p></o:p></p></div><div><p class=MsoNormal>Licensed MT Residential Electrician<o:p></o:p></p></div><div><p class=MsoNormal>406.291.3416<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://www.thirstylakesolar.com/">thirstylakesolar.com</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Nov 5, 2020, at 9:26 PM, AE Solar <<a href="mailto:autonomousenergies@gmail.com">autonomousenergies@gmail.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>Wrenchers,<o:p></o:p></p><div><p class=MsoNormal>Wondering if anyone has had any experience with bad diodes in QCell panels. Two of our projects this summer had panels that were putting out half of their rated voltage. At first it seemed like it was a defect from the factory, and it was caught upon commissioning the system, but I'm now seeing that another panel has gone bad about two months after install. I've spoken with a few distributors and they said they haven't heard anything about this being a pattern. I'm in the RMA process with QCell, and don't feel like I'm getting complete transparency from them. So far we have 8 defective panels out of 300. It was in two different projects that were months apart. I'm not sure if they were from the same shipment or not. All of them were<span style='color:black;background:white'> Q.PEAK DUO 400 watt panels. Interested to know if anyone else is having similar experiences? Thanks for any thoughts.</span><o:p></o:p></p></div><div><p class=MsoNormal>Adam<o:p></o:p></p></div><div><p class=MsoNormal><br><br><o:p></o:p></p></div><div><div><div><div><div><div><div><div><p class=MsoNormal>Adam Katzman<br>Autonomous Energies<br>PO Box 1245<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Kingston, NY 12402<br><a href="http://www.autonomousenergies.com/" target="_blank">www.autonomousenergies.com</a><br>(518) 567-1468<o:p></o:p></p></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'>_<o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></body></html>