From a field of twelve other tested modules from various producers, TÜV Rheinland’s Energy Yield Test determined the winning module using real energy yield as opposed to climatic chamber tests and power measurements with a sun simulator.

During the test, the individual modules were automatically kept at maximum power point (MPP) with the help of electrical charges. TÜV Rheinland considered only the values at which all test modules were at MPP, so that no participant was placed at a disadvantage. The deciding factor in the standard test conditions power output measured by TÜV Rheinland was the yield per watt peak.

Christian Bauerdick from TÜV Rheinland says: "Thanks to new software, a completely shadow-free test roof and, last but not least, highly precise measuring equipment, we were able to raise the 2010 Energy Yield Test to an entirely new standard.”

The overall measurement system is divided into the following areas:

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  • Central compilation of meteorological data
  • Measurement of module temperature and of global solar radiation at the level of the test subjects
  • MPP tracking and output measurement for the modules.

After a full year of output testing under real solar radiation conditions, SCHOTT PERFORM POLY 225 (220-240) came in first place.

Dr Martin Heming, Chief Executive Officer of SCHOTT Solar, commented on the TÜV results: “Optimising energy output is our top priority, next to producing high-quality solar modules. The most recent test results confirm our success. The proof that our modules supply high-energy output and offer high-performance stability gives investors and photovoltaic plant operators a reliable basis for planning the entire lifespan of a solar plant, securing good returns.”