LONGi Hydrogen LONGi Hydrogen is a Chinese electrolyzer company specializing in alkaline water electrolyzers (AEL) for hydrogen production. It is a subsidiary of the Chinese solar PV module manufacturer LONGi Green Energy Technology Co., Ltd. (LONGi). IDTechEx interviewed LONGi Hydrogen at the China International Hydrogen Congress & Expo (CIHC) 2026 in Beijing, China. LONGi Hydrogen