As part of a cross-sectional study, the Fraunhofer Center for Silicon Photovoltaics (CSP) in Halle, Germany has now confirmed that Q.Cells solar modules reliably prevent this risk and maintain their full output. The high failure rate of the investigated brand modules from other manufacturers confirm how relevant the topic is.
The Frauenhofer CSP subjected 13 types of modules from renowned manufacturers to an accelerated PID test. All modules had a glass-foil construction with 60 six-inch polycrystalline solar cells. Of the 13 modules tested, nine modules showed an output loss – partially in excess of 90%. On average, nominal output decreased by 56%. Only four module types showed no signs of degradation.
The tested Q.PRO modules from Q.Cells made it through the test without output losses compared to their initial specifications. ‘We are pleased with the positive results, which reflect on our long-term experience and quality claim, said Karl Heinz Küsters, Head of Research and Development at Q.Cells. ‘Thanks to intense research activities, Q.Cells found a solution for the PID phenomena early on and today provides a true, measurable and sustainable edge in quality to its customers by secure yields without power loss.
Together with Hot-Spot-Protect and the Tra.Q coding unique to each individual cell, Anti-PID forms the core of Q.Cells Yield Security, which guarantee proven, stable yields from cells and modules.
Chart source (see attached): Fraunhofer-Center für Silizium-Photovoltaik CSP
PID (potential induced degradation): One of the most significant negative influences on the energy yield of solar modules is so-called potential induced degradation (PID). This can cause a solar module's output to decrease when it is subject to high negative voltage between the solar cell and the ground during use, especially in large facilities. The ideal solution to this problem is PID-resistant technology on a cell level.
