Nov. 06, 2025:Quality & Failure Modes in High-Cost Pressure Market: Johannes Stang, TUV

At the Reliable PV Module Design 2025 Conference, Johannes Stang, Head of Solar Lab at TÜV Rheinland, who was the keynote speaker, shared that failure rates are being observed in recent solar projects. Nearly every qualification or test project showed some form of issue, many of which were identified during early measurements. Environmental stresses were a leading cause, often impacting mechanical integrity and electrical coordination due to design or material choices. Common problems included moisture, delamination, and degradation, such as PID and UID, he added. Stang also emphasized that selecting the right materials and maintaining strong process control can help prevent such failures early.

The Conference took place on November 6, 2025, and saw leading experts exploring crucial questions such as how reliable PV module design and mass production can be achieved amid rapid innovation and cost pressures, or if the quality challenges flagged by testing organizations are more than usual. Watch this video for more information.