On April 21, 2025, the U.S. Department of Commerce (DOC) issued a final determination in its antidumping (AD) and countervailing duties (CVD) investigation from four Southeast Asia countries: Vietnam, Malaysia, Thailand, and Cambodia.

The United States has one of the largest solar markets in the world. According to the Solar Energy Industries Association, the U.S. solar market was valued at $70.4 billion in 2024, supporting more than 10,000 businesses.[1] Due to its lucrative nature, the U.S. solar market attracts the export of solar cells, the main component for solar panels, from various countries. While it is too early to conclude how much impact the AD & CVD investigation will have on the U.S. solar market, this article breaks down the DOC’s final determination its AD & CVD investigation.

Vietnam: Antidumping (A-552-841)

The antidumping investigation of solar cells from Vietnam covers the period from October 1, 2023, to March 31, 2024. All imports of the subject merchandise, except excluded merchandise, from Vietnam is covered by this AD investigation. 9 out of the 11 mandatory respondents received a rate of 82.65%. One mandatory respondent received a rate of 58.07% and one mandatory respondent received a rate of 125.91%. The DOC determined that the Vietnam-Wide Entity rate is 271.28%.

Vietnam: Countervailing Duty (C-552-842)  

The countervailing duty investigation of solar cells from Vietnam covers the period from January 1, 2023, to December 31, 2023. All imports of the subject merchandise, except excluded merchandise, from Vietnam is covered by this CVD investigation. Four out of the six […]

On April 24, 2025, Ferroglobe USA, Inc. and Mississippi Silicon LLC (collectively, “Petitioners”) filed an antidumping and countervailing duties petition on ferrosilicon from Angola, Australia, Laos, Norway, and Thailand.

Antidumping duty investigations are administered by the U.S. Department of Commerce (DOC) and the U.S. International Trade Commission (“ITC”). Dumping occurs when a foreign company sells a product to the United States below its normal value or cost of production. Subsidy is defined by a foreign government providing financial assistance to a foreign company for manufacturing or exportation.

The scope of the petition (subject to change during the investigation) covers:

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All forms and sizes of silicon metal, including silicon metal powder. Silicon metal contains at least 85.00 percent but less than 99.99 percent silicon, and less than 4.00 percent iron, by actual weight. Semiconductor grade silicon (merchandise containing at least 99.99 percent silicon by actual weight and classifiable under Harmonized Tariff Schedule of the United States (HTSUS) subheading 2804.61.0000) is excluded from the scope of this investigation.

Silicon metal is currently classifiable under subheadings 2804.69.1000 and 2804.69.5000 of the HTSUS. While the HTSUS numbers are provided for convenience and customs purposes, the written description of the scope remains dispositive.

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Foreign producer list can be find here.

Importer list can be find here.

Diaz Trade Law will continue to monitor this case and share updates.

For more information or questions get in touch with us at 305-456-3830 or info@diaztradelaw.com.