US Sets 15% Polysilicon Tariff and $21/kg Import Floor Under Section 232

The administration signed a Section 232 proclamation imposing a 15% tariff on imported polysilicon products, paired with a minimum import price of $21 per kilogram for polysilicon itself and additional price floors on derivative products . The action was taken under the national security provisions of the Trade Expansion Act of 1962.

Two details matter more than the headline rate. First, the measure does not take effect immediately: it applies 120 days out, on December 4, 2026, which gives importers a full quarter to pull material forward. Second, the scope is origin-agnostic. It covers any imported solar or semiconductor component containing polysilicon, from raw polysilicon through wafers, cells and finished panels, regardless of the country the finished good ships from. That closes the transshipment route that blunted earlier China-specific solar duties.

The intended beneficiaries are domestic and allied producers. FSLR publicly commended the action, and the measure supports Hemlock Semiconductor, Wacker Chemie and REC Silicon, whose dormant US polysilicon capacity Qcells has been funding a restart of with an investment of more than $160 million. China accounted for roughly 93.5% of global polysilicon output as of 2024, which is the concentration the proclamation is aimed at.

The cost side falls on module importers and developers, since a price floor set above prevailing spot levels raises the landed cost of essentially all imported panels. What to watch between now and December is the pull-forward: a surge of pre-effective-date imports would depress near-term domestic pricing before the policy support arrives, and would make the fourth-quarter demand figures for US solar harder to read.

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