Sungrow and TÜV Rheinland Redefine Industry Rule: World's First Inverter Long-Term Reliability Corporate Standards Released

During the Intersolar Europe 2026 exhibition, Sungrow and TÜV Rheinland jointly launched the world's first quantitative long-term reliability standards for PV inverters, including 2 PfG 3325 Reliability test qualification for IGBT modules in photovoltaic power systems and power electronic converter systems and 2 PfG 3328 - Part 2 Specifications for Reliability Testing and Assessment of Power Electronic Products - Part 2: Power Conversion Equipment (PCE). Sungrow's SG510HX string inverter and its IGBT modules were among the first products certified under the two standards, providing early validation of the framework in practical applications. Meeting the Demands of Modern PV Plants As PV power plants continue to expand into increasingly demanding environments such as deserts, offshore locations, and high-altitude regions, ensuring inverter reliability over 25 years of operation has become increasingly important for project owners and investors. However, existing reliability qualification methodologies were not originally designed to fully capture the increasingly diverse and demanding operating conditions of modern PV plants, creating a gap between laboratory qualification and long-term field performance. To address this challenge, Sungrow and TÜV Rheinland have developed a comprehensive reliability evaluation framework that enables a more scientific, quantitative, and traceable assessment of inverter lifetime performance. From Systems to Components: A Unified Reliability Validation Framework Facing the shortcomings of traditional standards, the dual framework establishes a robust, quantifiable reliability methodology spanning the entire "system-component" validation continuum. 2 PfG 3325 (IGBT Reliability Test Standard) is a component-level standard, addressing the failure mechanisms and ...