Q.CELLS says its solar modules have undergone TUV Rheinland's four-fold potential-induced degradation (PID) test.
During the testing period, a negative voltage is applied to modules at room temperature, and modules whose performance declines by less than 5% are deemed to have passed. The tests under the new extended conditions lasted for four weeks, meaning they are far more stringent than standard.
Q.CELLS submitted several modules for testing in line with these new conditions. In the end, TUV Rheinland announced that all the Q.CELLS modules that the testing institute examined passed the test, Q.CELLS says, adding that none of the solar modules displayed a decline in performance by accuracy of measurement, which means they are PID resistant.