Solarfun Power Holdings, a vertically integrated manufacturer of silicon ingots, wafers and photovoltaic (PV) cells and modules in China, has signed a long-term supplementary wafer and polysilicon product supply contract with GCL-Poly Energy.

GCL-Poly will provide Solarfun with a total of 2,500MW wafer and polysilicon products over the next five years.

As per the supplementary wafer and polysilicon product supply contract between Solarfun and GCL-Poly subsidiary GCL (Suzhou) Solar Energy Technology Company, GCL-Poly will provide a total of 2,500MW wafer and polysilicon products from January 2011 to December 2015 to Solarfun.

Solarfun president and CEO Peter Xie said that by signing this long-term supplementary wafer and polysilicon contract with GCL-Poly, the company is further strengthening the long-term strategic collaboration between both parties.

"We expect this to satisfy our requirements for key raw materials on a cost-effective basis, and allow us to continue expanding in scale as we meet our growing customer needs worldwide," Xie said.