To identify the best of the best, RETC reviewed and ranked the overall data distributions across three disciplines: quality, performance, and reliability. Backsheet ultraviolet durability Top performers: JA Solar, Longi Solar. Efficiency Leaders Command Premium Pricing: The highest efficiency panels like Aiko Solar's 24. 75/watt, while best-value options like REC's 22. For most homeowners, the efficiency sweet spot is 22-23% unless roof space is. The Renewable Energy Test Center (RETC) released its 2023 PV Module Index report, evaluating the reliability, quality, and performance of solar panels. Solar modules are put through a variety of accelerated stress tests to evaluate these parameters. Through comparative test results, project. The past year of PQP testing saw reduced power loss in multiple tests, higher energy yields and 43 manufacturers named as 2026 Top Performers. PVTIME – On 10 June 2025, the PVBL 2025 Global Top 100 Solar Brands rankings and the PVBL 2025 Global Solar Brand Influence Report were unveiled at the 10th Century Photovoltaic Conference in Shanghai, China.
