Sunpower Group Ltd. is an investment holding company, which engages in the design, manufacture, and research and development of customized energy saving, energy-efficiency, and environmental protection products and solutions. It operates through the following segments: Environmental Equipment Manufacturing (EEM), Engineering, Procurement, and Construction (EPC) Integrated Solutions, and Green Investments. The EEM segment offers heat exchangers and pressure vessels, heat pipes and heat pipe exchangers, pipeline energy saving products, and related environmental protection products. The EPC Integrated Solutions segment comprises of energy saving systems such as flare-gas recovery system; sulfur recovery system and Zero Liquid Discharge system; photovoltaic power generation and clean energy related petrochemical engineering; engineering, procurement and construction of build-operate-transfer or transfer-operate-transfer or build-operate-own projects. The Green Investment segment includes technology on pulverized-coal combustion and long distance heat insulating steam pipelines. The company was founded by Hong Xin Guo in April 1997 and is headquartered in Nanjing, China.