China Sunergy (Chinese: 中电光伏) is a Chinese solar cell products manufacturer based in Nanjing, Jiangsu, China. The company specializes in creating solar cells from silicon wafers. China Sunergy has a major customer base in China, but also sells their products internationally. On May 17 of 2007 the company began producing both monocrystalline and multicrystalline silicon solar cells. In 2012 the annual production of the cells were 1 GW and PV modules 1.2 GW. After listing as a NASDAQ Company in 2007, in 2013 May 23 China Sunergy opened its first international manufacturing base in Turkey. Turkey factory has the biggest solar cell and module capacity among both in Turkey and Europe. CSUN currently is the only Chinese solar cells and module manufacturer which has a manufacturing base in Europe