On January 13, China’s Ministry of Commerce (MOFCOM) released the final sunset review determinations on the anti-dumping measures applicable to imports of solar-grade polysilicon originating from the United States and the Republic of Korea, as well as the final sunset review determination on the countervailing measures applicable to imports of solar-grade polysilicon originating from the United States.
According to the determinations, starting from January 14, 2026, China will continue to impose anti-dumping duties on imports of solar-grade polysilicon originating from the United States and the Republic of Korea, and will continue to impose countervailing duties on imports of solar-grade polysilicon originating from the United States. The implementation period for both measures will be five years.
The products under investigation are solar-grade polysilicon, which is primarily used in the production of solar-grade monocrystalline silicon rods and directional solidification multicrystalline silicon ingots, and serves as a key raw material for the manufacture of crystalline silicon photovoltaic cells. The scope of this investigation does not include electronic-grade polysilicon used in the production of semiconductor products such as integrated circuits and discrete devices.
The “double remedies” involve varying duty rates. Companies originating from the United States are subject to relatively high anti-dumping duties, with rates generally ranging from 53.3% to 57%. By comparison, countervailing duty rates are relatively low, ranging from 0% to 2.1%. Among them, companies affiliated with REC and MEMC Pasadena, Inc. are exempt from countervailing duties.
Companies originating from the Republic of Korea are only subject to anti-dumping duties, but the duty rates vary significantly. OCI Corporation is granted the lowest rate of 4.4%, while Hanwha Solutions and Korea Silicon are subject to rates below 10%. In contrast, SMP Corporation and other Korean companies face sharply higher rates of up to 88.7%, with some enterprises, including Woongjin Polysilicon, subject to rates as high as 113.8%.
Source：EnergyTrend