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On July 25, 2025, the Trump administration announced a 15% tariff on all imported polysilicon and established minimum import prices for key solar components—wafers, ingots, cells, and modules. The move aims to bolster the domestic supply chain for semiconductors and solar panels, countering complaints from U.S. polysilicon makers that Chinese giants benefit from selling both solar-grade and microchip-grade versions of the ultra-pure material.
The tariffs, imposed under Section 232 of the Trade Expansion Act of 1962, cite national security concerns. Polysilicon will have a minimum import price of $20 per kilogram; wafers and ingots start at $100 per kilogram; cells at $0.22 per watt; and modules at $0.38 per watt. The Commerce Department granted a 120-day grace period before restrictions take effect, giving companies time to adjust.
To avoid repeating Europe’s failed protectionist experiment—which ultimately subsidized Chinese parent companies—the Commerce Department introduced an incentive program. Manufacturers making large capital investments in U.S. production can apply for exemptions from the new trade rules. South Korean giant Qcells, which recently opened the nation’s largest integrated solar factory in Georgia, is expected to qualify.
“Today’s decision balances the reality of where America’s solar manufacturing is today while advancing our collective ambition to onshore the entire supply chain,” said Andy Park, global CEO of Qcells.
Nick Iacovella, executive vice president of the Coalition for a Prosperous America, told Heatmap that the trade action “creates a market where wafer and cell manufacturing can happen in the United States, and companies can go fully vertically integrated.” He added that it also shores up chip supply chains amid urgency to de-risk from China and growing AI data center demand for new energy.
The tariffs come a week after the FCC banned new foreign-made inverters, though analysts say the impact is limited. Multiple industry sources caution that trade restrictions alone may not be enough to scale domestic solar supply chains. Data from the Rhodium Group shows new U.S. solar factory investments peaked from H2 2022 through Q1 2025, averaging over $2 billion per quarter, but plummeted to about $350 million in Q1 2026—a drop of more than 80%.
First Solar, which uses thin-film technology and doesn’t rely on polysilicon, stands to benefit from rising panel prices. Its recent bookings average $0.36 per watt, and the tariff hike allows it to either raise prices or undercut competitors. T1 Energy, expected to ramp up U.S. cell manufacturing next year, saw its share price spike over 10% in after-hours trading; First Solar rose over 8%.
“There are a lot of people in the administration who support solar,” Iacovella said. “They just don’t want a bunch of Chinese solar panels.” He noted the policy is fundamentally about the chip supply chain, calling it a “two-for-one.”
