LONGi has been recognized as an ‘Overall Highest Achiever’ in RETC’s 2025 PV Module Index Report, marking the seventh consecutive year that the company has received such a distinction.
US based RETC (Renewable Energy Test Center) is a globally leading independent engineering services and certification testing body for photovoltaic (PV) and renewable energy products. Each year it subjects module products from major PV manufacturers to rigorous testing based on three core dimensions: Reliability, Performance and Quality.
According to the report, only 13% of total modules evaluated this year met RETC’s rigorous testing standards, with LONGi achieving outstanding results across multiple critical test categories. In Reliability Testing, the company earned numerous awards in key indicators including DH (Damp Heat), PID (Potential Induced Degradation), TC (Thermal Cycling) and SDML (Static & Dynamic Mechanical Load). In High-Performance Testing, it secured the top “Overall Highest Achievers” rating in core projects such as LETID (Light and Elevated Temperature Induced Degradation), LID (Light Induced Degradation), TEMP COEFFICIENT (Temperature Coefficient) and PAN FILE (Simulation Data File Performance).
