China Sunergy Co., Ltd. manufactures and sells solar cell and solar module products that convert sunlight into electricity. The Company's principal end-products are solar modules in different sizes and with varying power outputs. The Company sells solar cells and modules both under the brand of CSUN and on an original equipment manufacturer basis. It also invests in, develops and operates solar power projects both in China and abroad. The Company sells solar modules as its principal products to system integrators, solar power project developers and solar power product distributors located in various markets around the world, including the People's Republic of China, France, Germany, Japan, India, Australia, Italy and the United Kingdom. As of December 31, 2015, the Company had a two megawatts commercial rooftop project in Shanghai and a five megawatts rooftop project in Nanjing. As of December 31, 2015, the Company had an aggregate annual module production capacity of 1,155 megawatts.