Kesterite tech news
Trina Solar Co., Ltd. (SHA: 688599) announced on July 20, 2026, the commercial launch of its "Vertex K" series, the industry's first mass--produced Kesterite--enhanced bifacial module. By integrating a thin--film CZTS layer onto its N--type i--TOPCon cell architecture, the company achieved a certified conversion efficiency of 25.8%. The "Vertex K" is specifically engineered to optimize spectral response in the blue--green range, resulting in a 4% higher energy yield in diffuse light conditions compared to standard TOPCon modules. This launch marks a significant step in Trina's strategy to diversify its high--efficiency product portfolio using earth--abundant, non--toxic materials.