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SolarWorld quality ensures long-term high performance and stability


PID-free label for SolarWorld modules

The independent solar module test laboratory PV Evolution Labs (PVEL) in Berkeley, California, has awarded solar power modules from the SolarWorld AG the highest level certification: free from Potential Induced Degradation (PID-free). With this, the laboratory certifies products from the German solar energy group as possessing high quality and lasting performance.

In principle, there is always a difference in electrical potential between the frame and solar cells. Low-grade materials, susceptible solar cells, and a warm and humid climate – combined with this difference in potential – can lead to a significant reduction in output, known as Potential Induced Degradation (PID).

The goal of the test is to determine the stability of SolarWorld modules in regard to PID. PVEL compares module performance after a stress test with the original performance. During the 600-hour test in an extremely warm and humid climate (85°C/85% humidity), very high voltages of +1000 V or -1000 V exist between solar cell and frame. PVEL engineers determined that SolarWorld modules performed far better than the allowable degradation limit.

"With this test result and certification by PVEL, SolarWorld modules have proven their ability to deliver high performance over a long period of time," said SolarWorld Chairman and CEO Dr.-Ing. E. h. Frank Asbeck. "This is an additional investment safeguard for our customers and investors."

About SolarWorld AG: SolarWorld AG produces solar power systems and in doing so contributes to cleaner energy supply worldwide. The group located in Bonn employs approximately 3,000 people and carries out production in Freiberg, Germany and Hillsboro, USA. From raw material silicon to the solar power module, the company combines all stages of production – including their own research and development. Through an international distribution network, SolarWorld supplies customers all over the world with solar power modules and complete systems. The company maintains high social standards at all locations across the globe and has committed itself to resource and energy efficient production. It has been on the stock market since 1999 and is quoted in the technology index TecDax. SolarWorld achieved sales of about one billion euros for the fiscal year 2011. More information is available at

SolarWorld AG
Martin-Luther-King-Str. 24
53175 Bonn
Phone: +49 (0) 228/55920-409

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