LDK Solar modules have passed the potential-induced degradation (PID) tests performed at TÜV Rheinland’s and PV Lab’s laboratories. LDK states that in both tests, its modules demonstrated a reduction in performance under test conditions of less than 1%, earning LDK modules a Class A rating.
In order to assess the PID performance of its products, LDK Solar conducted testing of its 60 and 72 cell multicrystalline PV modules. During the tests performed by TÜV Rheinland and PV Lab, a negative voltage of 1,000V is applied to the modules at an ambient room temperature (25°C) and humidity over a period of 7 days (168 hours). The module front is covered with aluminium foil or a constant water film to minimize the resistivity with the grounded frame. According to both laboratories, if a module's performance declines by less than 5% under test conditions, it is deemed to have passed the test. LDK Solar's modules, with performance declines of less than 1% under test conditions, passed these tests by a wide margin.
“This positive product reliability testing carried out via two of the most respected laboratories in the PV industry demonstrates our commitment to ensure a long lifetime, reliable power output and uncompromised safety of LDK Solar modules,” said HK Cheong, deputy general manager of the LDK Solar Module Business Unit. “The superior quality of materials and workmanship in our modules results in long-term high power yields in all applications.”