[RE-wrenches] Cooler Modules

[Bill Loesch]

Bill

What kind of thermal camera are you using for this kind of inspection? 
Satisfied? Comments?

Thanks,

Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094

On 10-Sep-14 11:04 PM, Bill Hoffer wrote:
> Mark
>
> Loaded modules will have hotter cells. I know this from searching for 
> bad cells with a thermal camera.  At open circuit I could not see a 
> difference, but short circuit or loaded I could see 20 - 30 C increase 
> in mismatched cells .
>
> Bill
>
> On Wed, Sep 10, 2014 at 9:43 PM, Mark Frye <markf at berkeleysolar.com 
> <mailto:markf at berkeleysolar.com>> wrote:
>
>     Folks,
>
>     Two identical PV modules are mount in an identical fashion and
>     exposed to identical irradiance.
>
>     One module is open circuit. The other is connected to a load and
>     producing power.
>
>     Is there a difference in the temperature of the two modules? If
>     so, which one is cooler?
>
>     Mark Frye
>     Berkeley Solar Electric Systems
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> -- 
> William Hoffer
> 161 SE Fourth Ave
> P.O. Box 1823
> White Salmon, WA 98672-1823
> sunengser at gmail.com <mailto:bhoffer at sunergyengineeringservices.com>
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