[RE-wrenches] module hot spots

[Bill Loesch]

Hi Marco, boB, et al,

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?

TIA,

Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094

On 11/21/2015 11:48 PM, boB at midnitesolar.com wrote:
>
> I have looked at several modules (not SunPower though) and I see this 
> much temperature
> variation between cells BUT I have not seen anything like your 
> picture, with only one cell
> hotter.  What I have seen is hotter and cooler cells more or less 
> spread out
> semi-randomly.  Not sure if your example is normal or not for Sun Power ?
>
> Here is one example from my library of FLIR pix.
> A thermal imaging camera sure sheds light
> on many different things !
> boB
>
>
>
>
>
> On 11/21/2015 9:31 PM, Marco Mangelsdorf wrote:
>>
>> Hello all,
>>
>> I’m seeing hot spots on some of the SunPower modules we installed 
>> circa 2007-2010.  (I’ve been a SunPower dealer since 2005.)
>>
>> 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.
>>
>> cid:image001.png at 01D12070.CBCC60D0cid:image002.png at 01D12070.CBCC60D0
>>
>> 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?
>>
>> Mahalo,
>>
>> marco
>>
>>
>>
>> ________
>
>
>
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