Section 232 changes the economics of solar procurement overnight. President Trump has signed this latest round of tariffs on polysilicon imports, and the rate structure is steep enough to reshuffle who wins in the U.S. solar supply chain, with the potential to push some of today’s marginal projects out of the pipeline entirely.
The Section 232 investigation into polysilicon and its derivatives has been looming over the U.S. solar industry for more than a year. On August 6, 2026, President Trump ended the suspense, signing a proclamation that imposes a Minimum Import Price (MIP) structure on polysilicon, ingots, wafers, cells, and modules, plus a 15% ad valorem tariff on the derivative products, effective December 4, 2026. It’s one of the more consequential trade actions the U.S. solar industry has seen since the One Big Beautiful Bill Act’s passage in 2025 and, in particular, its sunsetting of the ITC.
This isn’t just a line-item cost increase to pass through on your next PPA. It’s large enough to change who supplies the U.S. market, which cell technology ends up in a project’s modules, and whether some of the projects in your pipeline today still pencil. And the biggest story here surprisingly isn’t modules; it’s wafers. Below, we walk through what was decided, how we anticipate the market will react, and your best paths forward for procurement now.
What’s Inside The Section 232 Polysilicon Proclamation
The U.S. Department of Commerce opened a Section 232 national security investigation into polysilicon and its derivatives on July 1, 2025. Commerce transmitted its report to the White House within the statutory window, and President Trump signed the resulting proclamation on August 6, 2026. The whole structure takes effect December 4, 2026, at 12:01 a.m. Eastern Time.
The confirmed remedy is a Minimum Import Price (MIP): $21/kg for polysilicon, $100/kg for polysilicon ingots and wafers (a single combined MIP), $0.22/W for solar cells, and $0.38/W for solar modules. On top of the MIP, ingots/wafers, cells, and modules (not raw polysilicon) are subject to an additional 15% ad valorem tariff. The only exceptions noted are that treaty partners including Japan, South Korea, Taiwan, Switzerland, Liechtenstein, and the EU receive a capped combined rate (existing duty plus the new tariff, totaling 15%), and the UK receives a flat 10% tariff. The 15% ad valorem tariff is stacked on top of existing duties, including AD/CVD orders, for every other origin, including China and Vietnam.
Here’s the confirmed rate structure:
| Product | Min. Import Price | Add’l Ad Valorem |
|---|---|---|
| Polysilicon | $21/kg | None |
| Ingots & wafers | $100/kg | 15%* |
| Solar cells | $0.22/W | 15%* |
| Solar modules | $0.38/W | 15%* |
Enforcement runs through entry documentation, meaning that suppliers must certify that resale will clear the MIP, or point to a fixed-term contract with a buyer signed before August 6, 2026, to avoid a penalty tariff. If the documentation is skipped or unavailable, the tariff defaults to the full MIP. If the purchase is documented but priced below the MIP, the supplier owes a gap tariff for the shortfall.
The Global Context That Led Here
China controls roughly 93.5% of global polysilicon production. The U.S. is down to two domestic producers, Hemlock Semiconductor and Wacker Chemie, after a decade of Chinese price competition pushed REC Silicon out of the market entirely. By the end of 2024, polysilicon prices collapsed from about $39/kg in 2022 to under $4.50/kg (per Bernreuter Research’s pricing research), wiping out margins for every non-Chinese producer along the way. That’s the classic dumping pattern that Section 232 and AD/CVD actions exist to address, and it’s the fact pattern the Trump Administration cited in the proclamation: U.S. share of global polysilicon capacity fell from 50% in 2005 to under 2% in 2024, and solar-grade polysilicon now makes up 97.6% of global output, versus 2.4% semiconductor-grade.
This action doesn’t stand alone. It sits inside a broader 2026 trade picture we’ve been tracking all year: the Solar IV AD/CVD case covering India, Indonesia, and Laos and follow-on investigations focused on Ethiopia and South Korea; FEOC Material Assistance Cost Ratio compliance requirements; last year’s critical minerals Section 232 action; and the FCC’s new restriction on foreign-made power inverters announced last week.
Domestic solar manufacturing takes on much greater value against the new MIP and tax backdrop. A U.S.-based manufacturer can position itself to sit outside the MIP-covered supply chain, in part or entirely. T1 Energy, for example, which purchased U.S. manufacturing capacity from Trina Solar and, more recently, TOPCon IP for domestic production, is expected to benefit once its U.S. cell manufacturing line ramps up, currently expected in Q1 2027. First Solar is particularly well positioned, as its CdTe thin-film modules fall under none of the covered HTS codes. A $0.38/W module floor (as we describe below), plus 15% ad valorem tariff for most origins, well above current C-Si import pricing, is a real, confirmed tailwind for First Solar specifically.
Lastly, the onshoring program offered in this new regime provides a duty exemption during construction for Commerce-approved company plans, scaled to the size of the investment and revocable for noncompliance. That creates a direct incentive for producers to invest in U.S. wafer or cell capacity.
What The MIP Structure Means for Module Pricing Now
For a compliant module import from a non-treaty-partner origin priced at the MIP, this puts the effective floor at $0.38/W, assuming suppliers can absorb the 15% ad valorem tax. If importers can’t, then the import prices could rise by that additional amount. In addition, existing AD/CVD duties are confirmed to continue applying in full alongside the new MIP and ad valorem, resolving what had been an open question pre-announcement.
| Estimated Minimum Price Increase from Section 232 | Imports | Domestic Assembly w/ Imported Cells | Domestic Assembly w/ U.S. Cells & Imported Wafers |
| Price Aug. 5th* | 27.1 cents | 30 cents | 47 cents |
| Estimated minimum price post ruling** | 38 cents | 43 cents | 56-62 cents |
| Estimated minimum impact of Section 232 | 10.9 cent increase (40%) | 13 cent increase (43%) | 9-15 cent increase (19%-32%) |
**Assuming importers are able to absorb the 15% tax. If not, import prices could rise by the amount of the tax.
Comparing Anza median platform pricing from August 5th to the new estimated minimum price based on the proclamation, we estimate imports rising 40%, domestic assembled modules with imported cells rising 43% and domestic assembled modules using U.S. cells and imported wafers rising anywhere from 19-32%.
How We See the Solar Market Changing
First Solar is outside of this ruling and we expect their prices to increase. As mentioned above, First Solar is entirely outside the MIP-covered supply chain. With C-Si module pricing pushed higher across the board, it has real room to raise its own prices simply because it can. Expect First Solar pricing to move up alongside, not despite, the new floor on its silicon-based competitors.
With a major shift to domestic cells and a bigger move to domestic cells with domestic wafers, this means the market is replacing international TOPCon with domestic PERC. Because there simply aren’t enough domestic TOPCon options available today, developers pushing for domestic content get pushed toward domestic PERC by necessity, not preference, carrying real implications for module efficiency and performance specs that buyers used to TOPCon-based products should plan for now.
Some projects with marginal economics will be squeezed and may die, and the market will shrink overall, because, all else being equal, pricing just went up 9 to 15 cents with nowhere to run.
The premium in choosing Domestic Content (DC) cells versus imported cells doesn’t really change: the premium was (and still is) about 20 cents per watt for a DC cell vs an import. However, we expect that with a strategy of blending domestic cell modules with imported modules, going domestic with DC cells will likely become more favorable. We expect domestic cell manufacturing capacity to expand in response, as pricing power and ITC-driven demand both now point in that direction, reinforced by the confirmed onshoring program, which gives domestic-capacity investors a concrete duty-exemption mechanism, not just a general cost advantage.
Relying on domestic assembly but not domestic cells as a strategy is under pressure for tight deals. In particular, projects that were barely penciling and were relying on the domestic ITC boost and utilizing imported cells can no longer use that strategy, as the price of imported cells just went up by at least 13 cents. It is also now the case that some projects optimized in this way may prefer to blend with full U.S. DC Cell modules.
Domestic wafer production is the biggest winner of the Section 232 story. The days of $5/kg Chinese poly are over, and domestic wafer production has become dramatically more valuable overnight. As a result, we expect to see capacity expansion of domestic wafers, with a huge increase in projects now moving to take advantage of the ITC boost from domestic content, meaning they will need or want domestic wafers to avoid the MIP impact on the wafer cost.
What Should You Do Now?
The risk to buyers isn’t just the MIP and tariff rate; it’s the lag between announcement and action. The December 4, 2026 effective date gives you a real, finite window to act. But as the rest of the market reaches the same conclusion at the same time, suppliers are changing pricing and available capacity will tighten quickly. Buyers should adjust their procurement strategy as soon as possible to secure the best near-term options.
The most economical and risk-mitigating path forward for solar module procurement is:
- Procure inventory that is already imported into the United States. In some cases, suppliers will work with purchasers around their cash flow requirements. Anza can help with manufacturer inventory and client inventory.
- Move early and procure domestic-content modules before supply runs out or it becomes cost-prohibitive. Securing domestic content modules with cells is most attractive, due to the modest cost increases compared to the impact of the ITC bonus. Domestic content modules with U.S. made cells and wafers are even more economically attractive, but current supply is limited, and new U.S. wafer production will take 2-3 years to come online.
- For imports, procure modules quickly that import before December 4th, 2026,and only if the supplier is willing to take on the retroactive/stockpiling tariff risk.
- Procure modules not impacted by this tariff, such as First Solar modules if it makes economic sense.
How Anza Can Help You Move Quickly with the Right Data and Insights
Success in the post-232 era requires a proactive strategy rooted in real-time data, not a wait-and-see posture. Anza can help you act quickly to take advantage of existing inventory and get the domestic content product you need (while doing the analysis to know what domestic content is needed and qualifies at the best lifecycle cost). If you need more comprehensive procurement support, our Advisory Services team can help you navigate supplier contracts and negotiations, with experience supporting over 10 GW of procurements. We have fully negotiated and executed contracts with most U.S. OEMs. As a result, we have been able to close deals within days of initiation many times over the last few years, and we can do the same for you.
Schedule time with our team to get started.