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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 alt="" src="cid:part1.08090608.02040401@midnitesolar.com"
height="240" width="320"><br>
<br>
<br>
<br>
On 11/21/2015 9:31 PM, Marco Mangelsdorf wrote:<br>
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<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Hello all,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","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.)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","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.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><img id="Picture_x0020_1"
src="cid:part2.08020902.00060907@midnitesolar.com"
alt="cid:image001.png@01D12070.CBCC60D0" height="254"
width="339"></span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><img id="Picture_x0020_2"
src="cid:part3.06030002.04000101@midnitesolar.com"
alt="cid:image002.png@01D12070.CBCC60D0" height="254"
width="339"></span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","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?<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Mahalo,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif"">marco<o:p></o:p></span></p>
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<pre wrap="">________
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