Trina Solar to expand PERC production capacity : Trina Solar plans to invest in a 10 GW high-efficiency solar cell expansion project using 210 mm large size wafers, for which it has signed an investment cooperation agreement with the Yancheng Economic and Technological Development Zone Management Committee. The 10 GW capacity will add to the company's current annual solar cell production capacity of 12 GW. By the end of 2021, it plans to expand it to about 26 GW with 210 mm sized cells accounting for close to 70% of the total. By early 2021, the company aims to have the average efficiency of its newly built PERC cell capacity to reach 23%.