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 <ma...@berkeleysolar.com <mailto:ma...@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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