Kesterite tech news
Enphase Energy, Inc. (NASDAQ: ENPH) announced on September 23, 2026, the successful completion of field trials for its "IQ9K" microinverter, specifically engineered for the next generation of Kesterite--on--Silicon tandem solar modules. The IQ9K features a wide--input voltage range and a specialized "K--Sync" firmware update that optimizes the power conversion efficiency of the dual--junction architecture. This development positions Enphase to capture the emerging market for earth--abundant tandem cells, which are projected to enter mass production in late 2027. The company will present the full technical specifications at the Solar Power International (SPI) conference in Las Vegas.