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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'>I’m pleased with my Flir 4…cost me about $1,000.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'>marco<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Bill Loesch<br><b>Sent:</b> Sunday, November 22, 2015 2:21 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] module hot spots<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi Marco, boB, et al,<br><br>Thermal imaging is so useful for so many diagnosis. How did you choose the equipment you use without buying more than you use/need? Satisfied with your current machine or would you recommend something else?<br><br>TIA,<br><br><o:p></o:p></p><pre>Bill Loesch<o:p></o:p></pre><pre>Solar 1 - Saint Louis Solar<o:p></o:p></pre><pre>314 631 1094<o:p></o:p></pre><div><p class=MsoNormal>On 11/21/2015 11:48 PM, <a href="mailto:boB@midnitesolar.com">boB@midnitesolar.com</a> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><br>I have looked at several modules (not SunPower though) and I see this much temperature<br>variation between cells BUT I have not seen anything like your picture, with only one cell<br>hotter. What I have seen is hotter and cooler cells more or less spread out<br>semi-randomly. Not sure if your example is normal or not for Sun Power ?<br><br>Here is one example from my library of FLIR pix.<br>A thermal imaging camera sure sheds light<br>on many different things !<br>boB<br><br><img border=0 width=320 height=240 id="_x0000_i1025" src="cid:image001.jpg@01D124F9.77632D20"><br><br><br><br>On 11/21/2015 9:31 PM, Marco Mangelsdorf wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>Hello all,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>I’m seeing hot spots on some of the SunPower modules we installed circa 2007-2010. (I’ve been a SunPower dealer since 2005.)</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>Sometimes theses cells are 20-30 degrees C hotter than the surrounding cells and it’s especially striking while using a Flir IR camera. Check out the two images below.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'><img border=0 width=339 height=254 id="Picture_x0020_1" src="cid:image002.png@01D124F9.77632D20" alt="cid:image001.png@01D12070.CBCC60D0"><img border=0 width=339 height=254 id="Picture_x0020_2" src="cid:image003.png@01D124F9.77632D20" alt="cid:image002.png@01D12070.CBCC60D0"></span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>Do many of you come across hot spotted mods? Anyone know of any papers out there on hot spots and the hit on performance and reliability?</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>Mahalo,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman , serif","serif"'>marco</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></p><pre>________<o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>List sponsored by Redwood Alliance<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Change listserver email address & settings:<o:p></o:p></pre><pre><a 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><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List rules & etiquette:<o:p></o:p></pre><pre><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Check out or update participant bios:<o:p></o:p></pre><pre><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><o:p></o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><hr size=1 width="99%" noshade style='color:#909090' align=center></span></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='border-collapse:collapse'><tr><td style='padding:0in 11.25pt 0in 6.0pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><a href="https://www.avast.com/antivirus"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=100 height=100 id="_x0000_i1029" src="cid:~WRD000.jpg" alt="Image removed by sender. 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