LDK Solar announced that LDK photovoltaic (PV) modules have earned a “Class A” rating based on the potential-induced degradation (PID) tests conducted by the laboratories of PV Lab and TUV Rheinland. Since the company’s PV modules exhibited less than 1% reduction in overall performance under the standard test conditions, they were granted the “Class A” rating.
Potential-induced degradation (PID) of PV modules may occur due to high temperatures and increased humidity, which are environmental factors that degrade the PV modules during the course of their life cycle. Inherent voltage differences between the solar cells and module framework can also lead to degradation of modules by reducing the yield of the photovoltaic system.
LDK Solar Module Business Unit’s Deputy General Manager, HK Cheong, said that the positive results obtained by testing the company’s products through two reputed PV module testing laboratories have proved their commitment to provide LDK Solar modules with enhanced safety features, reliable power output and extended lifetime. He also proudly said that the top quality workmanship and materials used in their modules have resulted in consistent high power yields.
The PID tests performed on the LDK Solar modules by PV Lab and TUV Rheinland involved applying 1,000 V of negative voltage to the 72 and 60 cell multicrystalline PV modules. This voltage was applied over a period of 168 hours (7 days) under the conditions of 25oC temperature (ambient room temperature) and humidity. The company’s modules passed the test by showing a marked performance decline of less than 1%, whereas the minimum requirement is a performance decline of less than 5%.