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