While 19 manufacturers received recognition as high achievers in RETC’s 2026 testing sequences, problems with ultraviolet-induced degradation in solar modules persist, while failing “red flag” scores increased in tests for damp heat and thermal cycling.

RETC 2026 PV Module Index Highlights Growing Focus on Long-Term Solar Reliability and Risk

While 19 manufacturers received recognition as high achievers in RETC’s 2026 testing sequences, problems with ultraviolet-induced degradation in solar modules persist, while…