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By Canary Media
By Canary Media
Canary Media
A far-reaching new tariff on solar imports promises to both raise the cost of installing the clean energy source and strengthen efforts to reshore solar manufacturing.
The White House announced the new tariffs Thursday on imported polysilicon and related products, including silicon-based solar panels and their precursor components. The decision came out of an investigation under Section 232 of the Trade Expansion Act of 1962, which allows the president to restrict trade over national security concerns. Polysilicon is the crucial input for computer chips as well as most solar panels.
Back in the first Trump term, competition from China had nearly eliminated solar manufacturing in the U.S. A small but vocal contingent of lingering or bankrupt manufacturers successfully pushed for new solar tariffs over the vociferous complaints of the far bigger population of installers and developers who stood to suffer from the higher input costs.
Then, in 2022, the Biden administration passed the Inflation Reduction Act, which created domestic manufacturing incentives for clean energy. It also embraced certain tariffs on foreign solar. The combination of proactive incentives and protective tariffs has since succeeded where tariffs alone had not: The U.S. became self-sufficient in module production in just a few years, with far more modest progress on cells and other components.
These days, developers of large solar projects routinely tout their “Made in the USA” credentials. A recent groundbreaking for an enormous solar-battery plant in Arkansas, for instance, highlighted the project’s use of domestic panels from First Solar, domestic trackers from Nextpower, and steel piles from a steel mill down the road.
The new tariffs stand to benefit a solar manufacturing industry that has grown immensely since the tariff battles of Trump’s first term. But this solar trade protectionism is also certain to raise the cost of building new solar farms — the main new source of electricity in the U.S. — at a time when power bills are already soaring.
Here are the key facts for understanding the new tariffs and how they’ll affect the future of clean energy.
On December 4, the U.S. will enforce minimum prices for the following imports:
$21 per kilogram for polysilicon, the key input for silicon-based solar panels
$100 per kilogram for polysilicon ingots and wafers, two materials used to make solar panels
22 cents per watt for solar cells, which turn silicon wafers into electricity generators
38 cents per watt for solar modules, the finished product that combines photovoltaic cells in a frame with protective glass and wiring
The decision also imposed a 15% ad valorem duty on polysilicon derivatives.
The December start date has rankled some supporters of the tariffs.
“It gives importers a window to surge product into the U.S. market before duties take effect, which is precisely the kind of behavior our trade laws are designed to prevent,” said Tim Brightbill, an attorney who has successfully petitioned for solar tariffs for years. “It will be critical that the government rigorously enforce the rules against stockpiling so that importers cannot undermine the remedy before it is even in place.”
Trump picked seemingly arbitrary tariff rates for most of the world in April 2025, reshaping the flow of global trade until even the conservative Supreme Court declared he lacked the legal authority to do so.
The Section 232 tariffs come from a different process that has a strong legal footing. The statute gives the president broad authority to impose tariffs for strategic industries after an investigation by the Commerce Department. Trump has previously used this process to raise tariffs on items such as steel and aluminum, and those tariffs have held.
The U.S. builds more solar farms than any other electricity source. But the Trump administration has not been friendly toward solar developers: It’s removed tax credits for solar installations, obstructed permitting processes, and espoused plenty of anti-solar rhetoric.
The new tariffs add more costs onto the list of things developers have to worry about. The most pronounced impact will come from the added costs for polysilicon, ingots, and wafers, because the U.S. lacks the capacity to produce these at anywhere close to the levels needed to meet the current domestic demand.
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As of this summer, the U.S. has 10.6 gigawatts of operating cell capacity, according to the Solar Energy Industries Association. The new cell tariffs should drive additional demand to Qcells, ES Foundry, Suniva, and Silfab — the only companies producing that item domestically. That will still leave tens of gigawatts of annual installations exposed to higher prices for cells that will have to be imported.
“The U.S. will remain dependent on importing cells, wafers, ingots, and/or raw polysilicon for the foreseeable future,” said Pavel Molchanov, a cleantech investment analyst at Raymond James.
The median price for solar modules in the U.S. is 27.1 cents per watt, according to the database compiled by Anza Renewables; that reflects a mix of domestic and imported modules. This means the new floor price for imported panels will be 40% higher than the current median price on the U.S. market.
Modules assembled in the U.S. from imported materials cost 30 cents per watt; now, the cells that go into those modules will have a minimum import price of 22 cents per watt.
The median price for domestic modules using domestic cells is 47 cents, per Anza. Those panels could become even more expensive if the manufacturers can’t get their hands on domestic wafers.
The U.S. already had among the most expensive solar module prices in the world thanks to previous tariffs; the new price floor will be nearly five times the global benchmark price, Molchanov noted.
The decision provides for tariff exemptions if companies get Commerce Department sign-off on plans to build factories by January 20, 2029. This could mitigate tariff-driven price increases while ingot, wafer, and cell capacity grows to meet demand.
Tariff supporters see this as a vital tool to protect the fledgling U.S. solar manufacturing base and drive further investment in the trickier, more expensive stages of the supply chain. Since it’s a global tariff, it could finally end the long-running Whac-A-Mole problem in which U.S. tariffs belatedly catch up to Chinese manufacturers setting up shop in new countries.
“Every time U.S. cell and module producers seek trade relief, the Chinese companies shift their unfair trade practices to other countries,” said Brightbill, a partner at Wiley Rein LLP. “We are hopeful that if this Section 232 action is done right, it could be an important step toward addressing this problem.”
This is a good moment to be Qcells, the subsidiary of Korean conglomerate Hanwha that invested more than $2 billion to build a combined ingot, wafer, cell, and module plant in Georgia. Cells started rolling off the line in June, and the ingots and wafers are set to enter production later this year. Hanwha’s stock price surged 17% after the announcement, though it has since subsided somewhat.
Longtime U.S. manufacturer First Solar stands to benefit as well, as its cadmium-telluride thin-film technology does not rely on the silicon supply chain. The company can sit back and watch its competitors scramble to figure out the new realities of global trade in silicon. Not surprisingly, First Solar CEO Mark Widmar hailed the 232 outcome as “one of the most strategically significant trade measures in decades.”
But a cohort of manufacturers could be caught in an awkward transitional phase: Their module production will be protected from foreign modules, but their own costs will go up unless more cell capacity comes along.
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Julian Spector is a senior reporter at Canary Media. He reports on batteries, long-duration energy storage, low-carbon hydrogen, and clean energy breakthroughs around the world.
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