US President Donald Trump signed an executive order establishing a 15% tariff alongside minimum import prices on imported products made from polysilicon, a vital material used in both solar panels and semiconductors. The action follows a national security investigation into the overseas production of the material conducted by the US Commerce Department. The initiative is intended to protect domestic manufacturers against rising competition from China’s chip industry, which represents a central point of friction between the world’s two largest economies.
US Imposes 15% Tariff and Price Floors on Polysilicon
Under the signed order, the measures are slated to take effect in December, and the US will also offer incentives to boost domestic production. The action implements recommendations made by Secretary of Commerce Howard Lutnick. The policy combines a minimum import price framework with a 15% tariff on polysilicon derivatives such as wafers, solar cells, and finished solar panels.
Strategic Chokepoint and Domestic Production Landscape
Polysilicon serves as the ultra-pure feedstock from which silicon wafers are sliced for use in semiconductor chip fabrication and photovoltaic solar cells. The material sits at the base of two critical supply chains simultaneously, forming a key chokepoint position in technology manufacturing.
China holds a dominant position in the global market, producing 93.5% of the world’s polysilicon as of 2024, with nine of the ten largest global producers based in the country. The top four Chinese producers—Tongwei, GCL Technology, Daqo New Energy, and Xinte Energy—together accounted for 65% of global output. By contrast, imports have driven the US share of global polysilicon production down from 50% in 2005 to less than 2% in 2024, leaving the United States with essentially two domestic producers: Hemlock Semiconductor in Hemlock, Michigan, and Wacker Chemie in Charleston, Tennessee. An earlier domestic operator, REC Silicon, operated in Washington State but faced significant operational challenges.
Economic Impacts and Industry Stakes
However, the policy’s immediate financial burden will be paid by US solar developers and semiconductor manufacturers that currently rely on cheap imported polysilicon. Industry analysts note that while protected US producers can survive locally, they still face challenges competing globally or matching Chinese production costs, which benefit from inexpensive hydropower-fueled electricity.
The higher input costs resulting from tariffs and price floors mean more expensive solar panels, which translates to longer payback periods on installations and could cause certain planned clean energy projects to fall short economically. The push also intersects with domestic policy dynamics, acting in part as an effort to support the domestic manufacturing ambitions outlined under the 2022 Inflation Reduction Act, even as broader federal support for renewable energy deployment has faced rollbacks.
International Reactions and Trade Escalation
The Chinese embassy in Washington criticized the decision, stating that the move seriously disrupts
bilateral trade and that Beijing will act to protect its companies. The embassy accused Washington of abusing state power to go after Chinese businesses,
adding that protectionism will not enhance US competitiveness. Analysts view the new tariff as part of an ongoing escalation in Washington’s efforts to limit China’s role in critical technology supply chains, following prior restrictions on imported drones, humanoid robots, and other technology products.
In response to ongoing trade friction, China announced various countermeasures, including tighter export controls on drones and a national security review into imported printers and copiers. Meanwhile, the broader trade relationship between the US and China has involved a tit-and-tat tariff war that had remained on hold since May 2025, while production of computer chips continues to drive the broader technological and economic competition between the two nations.
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