Perfectenergy International Limited, through its subsidiaries, engages in the research, development, manufacture, and sale of solar cells, solar modules, and photovoltaic systems. It offers various kinds of cells, such as 6-inch cells and 8-inch cells, mono-crystalline cells, and multi-crystalline cells; and various types and sizes of solar modules. The company sells its products to systems integrators and distributors in Europe and the People s Republic of China. Perfectenergy International sells its photovoltaic modules under the Perfectenergy brand name. The company was founded in 2005 and is headquartered in Shanghai, the People s Republic of China.