Featured in Testing the waters – 07-2011

From dawn to dusk

Yield comparison: In diffuse light, thin film modules produce more electricity than crystalline thick-film variants and thus return higher annual yields overall. That is the promise made by many manufacturers. Yet current studies by TÜV Rheinland show that this isn’t the case, at least not across the board.

Half a year is how long engineers at the Arizona State University Photovoltaic Testing Laboratory, today owned by TÜV Rheinland PTL, had to wait. Then, finally, conditions were perfect on the barren test grounds, bordered by only a handful of palm trees: The sun shone at 200 watts per square meter, and the air was …

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