CSI Solar Co., Ltd. designs, processes, produces, and sells solar modules and photovoltaic systems in China and internationally. It operates through three segments: Components Business, Energy Business, and Energy Storage Business. Its offerings include crystalline silicon photovoltaic modules, solar system kits, inverters, solar energy and battery energy storage systems, as well as components, silicon rods, batteries, and battery cells. The company also engages in solar power and battery energy storage projects, the construction of solar power plants, and engineering, procurement, and construction services, serving the utility, commercial, residential, and industrial sectors. Founded in 2009 and headquartered in Suzhou, China, CSI Solar Co., Ltd. is a subsidiary of Canadian Solar Inc.