Trina Solar, a manufacturer of solar photovoltaic (PV) products, has signed a supplemental long-term wafer and polysilicon product supply agreement with GCL (Changzhou) Solar Energy Technology, a subsidiary of GCL-Poly Energy.

GCL-Poly will supply Trina Solar with wafers and polysilicon sufficient to produce approximately 7,500MW of solar modules in aggregate over five years.

Trina Solar vice president of supply chain management Patrick Lu said that the deal to secure a portion of Trina Solar’s wafer and polysilicon requirement from GCL-Poly continues to extend the company’s advantage to support its long-term sales growth and market share expansion goals into 2011 and beyond.

Delivery of the wafers and polysilicon will commence from this month to December 2015.