Solar Tariffs 2024: SEGA, Section 201, and the Bifacial Exemption Saga
Published June 15, 2024 — PES Supply Trade Policy Analysis
The first half of 2024 brought the most significant upheaval in U.S. solar trade policy since the Section 201 safeguard tariffs were first imposed in 2018. A cascade of actions — an antidumping and countervailing duty (AD/CVD) petition targeting four Southeast Asian nations, the revocation of the bifacial module exemption, the expiration of a two-year tariff moratorium, and a doubling of Section 301 tariffs on Chinese solar cells — collectively reshaped the cost structure of every module imported into the United States.
For installers and contractors, understanding these developments is essential for accurate project pricing, supply chain planning, and compliance with domestic content requirements. PES Supply tracks trade policy across our 50,000+ SKUs from 169 authorized brands to help you navigate an increasingly complex procurement landscape. This article breaks down the key tariff actions, their timeline, and practical strategies for managing their impact.
Equipment to consider: Silfab NTC 530W Domestic Content Panel or JA Solar 595W Bifacial Panel or Boviet 540W Bifacial Panel. All available with 7-10 business days delivery from PES Supply's 50,000+ SKUs across 169 authorized brands.
The Southeast Asian Tariff Investigation (SEGA)
On April 25, 2024, a group of U.S. solar manufacturers — including Hanwha Qcells, First Solar, Heliene, Suniva, Silfab, Crossroads Solar, Mission Solar, and Auxin Solar — filed an antidumping and countervailing duty (AD/CVD) petition with the U.S. Department of Commerce and the U.S. International Trade Commission against crystalline silicon solar cells and modules from Cambodia, Malaysia, Thailand, and Vietnam (collectively referred to as CMTV) (pv magazine USA).
This petition — sometimes referred to in industry shorthand as the Southeast Asia Global Alliance (SEGA) tariff action — targeted the four countries that collectively account for approximately 40% of global solar module production capacity outside of China (Deutsche Welle). The petitioners alleged that Chinese-owned manufacturers operating in these countries were circumventing existing U.S. tariffs on Chinese solar products by completing assembly in Southeast Asia.
How the Investigation Works
The AD/CVD process involves two key determinations:
- Countervailing duty (CVD) preliminary determination: Originally due in September 2024, the deadline was postponed to September 27, 2024. On October 1, 2024, the Department of Commerce issued its preliminary CVD determination, finding that countervailable subsidies existed for producers in Vietnam, Malaysia, Thailand, and Cambodia (NREL).
- Antidumping (AD) preliminary determination: Originally due in November 2024, the deadline was postponed to November 27, 2024.
Historically, AD/CVD tariffs have ranged as high as 50% to 250% of the cost of shipped goods (pv magazine USA). The petitioners also filed a request for a finding of critical circumstances in the Thailand and Vietnam investigations, which could result in collection of duties retroactive to 90 days prior to the preliminary determinations (SEIA).
Scope of the Investigation
The investigation covers modules made in the four targeted countries using cells of the same origin, as well as modules from other nations that include cells produced in CMTV countries. Critically, modules assembled in CMTV countries from cells made elsewhere are not affected — a distinction that benefits Chinese-funded manufacturers with vertically-integrated, non-Chinese supply chains (pv magazine USA).
This scope distinction created significant supply chain restructuring. Some manufacturers shifted production to Indonesia and Laos, which currently do not face U.S. tariffs (Deutsche Welle). By August 2024, Bloomberg reported that some U.S. firms were lobbying for tariffs as high as 272% on all solar imports from the four nations.
The Bifacial Module Exemption: A Saga in Five Acts
The bifacial solar module exemption from Section 201 safeguard tariffs is one of the most litigated trade policy issues in the history of the U.S. solar industry. Its reinstatement and revocation cycle directly affected the cost of 98% of all imported solar modules. Here is the complete timeline:
Timeline of the Bifacial Exemption
| Date | Action | Tariff Rate |
|---|---|---|
| February 2018 | Section 201 safeguard tariffs imposed on CSPV cells and modules | 30% |
| June 2019 | USTR grants exclusion for bifacial modules | Exempt |
| October 2020 | Trump Administration revokes bifacial exclusion (Proclamation 10101) | 18% |
| November 2021 | U.S. Court of International Trade reinstates bifacial exclusion | 15% |
| February 2022 | President extends Section 201 safeguard; bifacial modules excluded | 14.25% |
| February 2024 | USITC files midterm report; Hanwha Qcells petitions to revoke exclusion | 14.25% (exempt) |
| May 16, 2024 | Biden Administration announces plan to remove bifacial exclusion | 14.25% |
| June 26, 2024 | Bifacial exclusion officially revoked | 14.25% (now applies) |
The revocation was driven by a petition from Hanwha Qcells, supported by First Solar, Heliene, Suniva, Silfab, Crossroads Solar, Mission Solar, and Auxin Solar. The Biden Administration stated that the bifacial exclusion had "undercut the effectiveness of the safeguard measure" (Solar Power World).
The U.S. International Trade Commission documented that the two-year tariff holiday ended as scheduled on June 6, 2024, and producers that had been found to be circumventing the CSPV orders on China became subject to duties under those orders (USITC). The Administration provided a limited safeguard: importers with pre-existing contracts for bifacial modules to be delivered within 90 days of the exclusion removal could certify those contracts to continue using the exemption for that period (USTR).
SEIA opposed the revocation, arguing it would increase costs for commercial, industrial, and utility-scale solar projects. Industry analysis estimated the reinstated tariff would increase project costs by 1% to 2% (pv magazine USA).
Section 201 Safeguard Tariffs: The Foundation
The Section 201 safeguard tariffs, first imposed in February 2018 under President Trump, remain the foundational trade measure affecting imported crystalline silicon photovoltaic (CSPV) cells and modules. The tariffs were extended for a second four-year period in February 2022 and are scheduled to expire in February 2026 (DOE).
Current Section 201 Structure
| Component | Tariff Rate | Notes |
|---|---|---|
| CSPV modules | 14.25% ad valorem | Annual rate reductions scheduled through 2026 |
| CSPV cells (within TRQ) | 0% (duty-free) | First 12.5 GW annually (raised from 5 GW in August 2024) |
| CSPV cells (above TRQ) | 14.25% ad valorem | Applies to imports exceeding the tariff-rate quota |
| Bifacial modules | 14.25% (as of June 2024) | Exemption revoked; previously exempt since November 2021 |
| Thin-film modules | Exempt | CdTe, a-Si, CIGS technologies excluded |
According to the USTR's 2025 Trade Policy Agenda and 2024 Annual Report, Section 201 provides a procedure whereby the President may grant temporary import relief to a domestic industry if increased imports are a substantial cause of serious injury. Relief may be granted for an initial period of up to four years, with the possibility of extension to a maximum of eight years (USTR).
On August 1, 2024, the President increased the cell tariff-rate quota from 5 GW to 12.5 GW, allowing more duty-free cell imports for domestic module assembly. By October 28, 2024, more than 9.4 GW (75% of the TRQ) of cells had been imported under the raised quota (NREL). The USITC's Year in Trade 2024 report confirmed that the President revoked the exclusion for bifacial modules and raised the cell TRQ through Proclamation 10790, effective August 1, 2024 (USITC).
Section 301 Tariffs on China: Doubled in 2024
On May 23, 2024, President Biden announced the elevation of U.S. import tariffs on solar cells and panels from China from 25% to 50%, citing unfair business practices by Chinese companies (Reuters). While direct imports from China had already been limited by existing tariffs, the increase signaled a hardening of U.S. trade policy toward Chinese solar manufacturing.
In December 2024, the U.S. Trade Representative extended Section 301 tariffs further, doubling the rate on solar polysilicon and placing wafers on the Section 301 tariff list for the first time — both now subject to a 50% tariff if imported from China (pv magazine USA). The White House stated that "China has used unfair practices to dominate upwards of 80 to 90% of certain parts of the global solar supply chain and is trying to maintain that status quo."
However, the Administration also established a process allowing stakeholders to request temporary exclusion from Section 301 duties for certain solar manufacturing equipment, effective October 15, 2024 (USTR). This carveout recognized that domestic manufacturing capacity for certain equipment remains insufficient.
Impact on Module Pricing
The combined effect of these trade actions had an immediate impact on module pricing. Anza, a solar and energy storage supply chain platform aggregating data from 95% of the U.S. solar module supply, reported the first module price increase since late 2022 in its Q2 2024 Pricing Insights Report (pv magazine USA).
Key pricing observations from 2024:
| Pricing Metric | Value | Source |
|---|---|---|
| Median module price (Feb 2024) | $0.279/W | Anza Q2 Report |
| Median module price (May 2024) | $0.25/W | Anza Q2 Report (11% decrease) |
| Price increase (May 2024) | ~2% | First increase since late 2022 |
| DDP US TOPCon spot (Nov 2024) | $0.285/W | pv magazine / OPIS |
| FOB China TOPCon (Nov 2024) | $0.087/W | pv magazine / OPIS |
Clean Energy Associates (CEA) noted that while there was "no direct market impact" from the AD/CVD determination itself, the threat of tariffs was causing prices to increase, contracts to be re-negotiated, and procurement decisions to be delayed. Project timelines were being pushed back, particularly for projects planned for construction in 2025 (pv magazine USA).
As Anza CEO Mike Hall stated: "After years of record low pricing, we're seeing the market start to rebound as domestic manufacturers have less pricing pressure from foreign producers that are subject to tariffs. We're expecting to see this upward price trend continue from here, making it critical for new projects to consider current pricing and potential tariff impacts when sourcing materials" (pv magazine USA).
Installer Supply Chain Strategies
Given the tariff landscape, installers and contractors should adopt the following strategies to protect project economics:
1. Diversify Sourcing Regions
Relying on modules from a single country or region creates concentrated tariff risk. The CMTV investigation demonstrates how quickly a sourcing region can become subject to new duties. Installers should evaluate suppliers across multiple countries of origin, including:
- Domestically manufactured modules: Qcells (Georgia), Silfab (Washington/South Carolina), Mission Solar (Texas), First Solar (Ohio/Arizona) — browse our solar panels collection.
- Non-CMTV Southeast Asian sources: Indonesia and Laos currently do not face U.S. AD/CVD tariffs, though this could change.
- Exempt countries: Cambodia was exempt from Section 201 under the developing country exception, though it is now subject to the AD/CVD investigation.
- Thin-film modules: CdTe and other thin-film technologies are exempt from Section 201 tariffs entirely.
2. Understand BOM Requirements
The anti-circumvention ruling stipulated that products from CMTV nations could avoid tariffs by using non-Chinese wafers and meeting module bill-of-materials (BOM) conditions. This benefits Chinese-funded manufacturers with vertically-integrated, non-Chinese supply chains. Installers should request detailed BOM documentation from suppliers to verify tariff exposure (pv magazine USA).
3. Plan for Domestic Content Bonus Credits
The Inflation Reduction Act's domestic content bonus credit requires that structural construction components be 100% U.S.-manufactured, while "manufactured products" must include domestic content for 40% of cost (increasing to 55%). Even projects using trackers with a high portion of domestic content will typically need domestic cells or First Solar modules to qualify, and these remain in limited supply (pv magazine USA).
4. Lock In Pricing with Forward Contracts
Given the upward price trend and ongoing tariff uncertainty, securing forward contracts for module supply can protect project economics. The bifacial exemption revocation included a 90-day grandfathering period for pre-existing contracts, highlighting the value of documented purchase agreements (USTR).
5. Evaluate Cell TRQ Utilization
With the cell tariff-rate quota raised to 12.5 GW, domestic assemblers have greater access to duty-free cells. By October 2024, 75% of the TRQ had been consumed. Installers working with domestic assembly partners should monitor TRQ utilization rates, as the quota may be exhausted before year-end (NREL).
The Road Ahead
The Section 201 safeguard tariffs are scheduled to expire in February 2026, but the AD/CVD investigations and Section 301 tariffs will continue to shape the trade landscape regardless. SEIA noted in its Q3 2024 Solar Market Insight report that there is sufficient cell and module production capacity from multiple sources not subject to the proposed tariffs — production outside the targeted countries, expanding domestic production, and thin-film modules — suggesting that tariff impacts on overall solar deployment will be modest (SEIA).
However, the uncertainty itself has a cost. The threat of retroactive duties, re-negotiated contracts, and delayed procurement decisions creates friction throughout the supply chain. Installers who proactively diversify their sourcing, document BOM compliance, and maintain relationships with multiple suppliers will be best positioned to weather the ongoing trade turbulence.
PES Supply can help you navigate these challenges. With 50,000+ SKUs from 169 authorized brands, including domestically manufactured modules from Qcells, Silfab, Mission Solar, and First Solar, we offer the product breadth and trade expertise to support compliant, cost-effective procurement. Explore our solar panels, inverters, racking and mounting, and balance of system collections for your next project. Standard delivery is 7-10 business days.
Key Sources
- USITC, Crystalline Silicon Photovoltaic Cells Investigation (Pub. 5517) — usitc.gov
- USITC, The Year in Trade 2024 (Pub. 5673) — usitc.gov
- USTR, 2025 Trade Policy Agenda and 2024 Annual Report — ustr.gov
- USTR, Bifacial Exclusion Annexes — ustr.gov
- SEIA, Solar Market Insight Q3 2024 — seia.org
- pv magazine USA, Market Impacts from Solar Policy Actions — pv-magazine-usa.com
- Reuters, US Solar Builders Brace for Higher Costs — reuters.com
- NREL, Fall 2024 Solar Industry Update — docs.nrel.gov
- DOE, Overview of Trade and Policy Measures for U.S. Solar Manufacturing — energy.gov
🛒 Shop This Article
Find the equipment mentioned in this article across our 50,000+ SKUs from 169 authorized brands. 7-10 business days delivery.
Related Reading: Section 301 Tariffs Hit Solar Components: Inverters and BOS Get Caught in the Trade War — the September 2018 expansion that brought inverters, junction boxes, and backsheets into the trade war with a 10% duty on $200 billion of Chinese imports.
The Section 201 Schedule, Year by Year
Safeguard tariffs are unusual in U.S. trade law because they are explicitly temporary and explicitly declining — the theory is to give the domestic industry breathing room to become competitive, not to build a permanent wall. The solar safeguard imposed in January 2018 followed that template exactly: 30 percent in year one, stepping down five points annually. When the four-year term expired, the 2022 extension restarted the clock at 14.75 percent with quarter-point annual steps, and with the bifacial exclusion preserved.
| Period | Module Tariff Rate | Cell Tariff (above 2.5 GW quota) | Bifacial Status |
|---|---|---|---|
| Feb 2018 – Feb 2019 | 30% | 30% | Initially subject |
| Feb 2019 – Feb 2020 | 25% | 25% | Excluded June 2019; exclusion withdrawn Oct 2019; litigation begins |
| Feb 2020 – Feb 2021 | 20% | 20% | Court reinstates exclusion |
| Feb 2021 – Feb 2022 | 18% (set by 2020 proclamation) | 18% | Proclamation attempts revocation; court voids it Nov 2021 |
| Feb 2022 – Feb 2023 | 14.75% | 14.75% | Excluded under extension |
| Feb 2023 – Feb 2024 | 14.5% | 14.5% | Excluded |
| Feb 2024 – Feb 2025 | 14.25% | 14.25% | Excluded |
| Feb 2025 – Feb 2026 | 14.0% | 14.0% | Excluded |
Read that table as a pricing calendar, because that is how procurement teams actually use it. Every February, imported module cost ticks down by a quarter point. On a 500 kW commercial order at $0.32 per watt, the step from 14.5 percent to 14.25 percent is worth about $400 — not enough to time a project around, but enough to matter in a bid spread across a portfolio.
What the Tariff Costs in Dollars per Watt
Percentages obscure the actual project math, so here is the translation. At a representative import price of $0.30 per watt, each tariff regime adds a specific, calculable amount to module cost — and the delta between regimes is what sourcing teams are paid to manage.
| Regime | Rate | Duty on $0.30/W Module | Landed $/W | Module Cost, 10 kW Array |
|---|---|---|---|---|
| No tariff | 0% | $0.000 | $0.300 | $3,000 |
| Section 201 (2024–25 rate) | 14.25% | $0.043 | $0.343 | $3,428 |
| Section 201 + moderate AD/CVD | 50% | $0.150 | $0.450 | $4,500 |
| Section 201 + severe AD/CVD | 100% | $0.300 | $0.600 | $6,000 |
| Domestic module (no duty) | 0% | $0.000 | $0.380 (typical premium) | $3,800 |
The last row explains the entire post-2022 reshoring wave. When the severe-AD/CVD scenario prices imports at $0.60 per watt and a domestic module lands at $0.38, the domestic option wins on price alone — before anyone counts the 10 percent domestic-content ITC adder that can apply to the project. We watched this play out in our own order book: quotes that assumed Vietnamese supply in early 2024 had to be rebuilt around domestic and non-subject-country modules by mid-year, and customers who locked pricing early were the ones whose projects penciled.
The Bifacial Exclusion: A Four-Year Courtroom Loop
No tariff subplot has consumed more legal fees per percentage point than the bifacial exclusion. The sequence, in brief: USTR granted the exclusion in June 2019, withdrew it that October under industry pressure, saw it reinstated by the Court of International Trade, watched a 2020 presidential proclamation attempt to revoke it and raise the year-four rate to 18 percent, and then saw the court void that proclamation in November 2021 as procedurally improper. The 2022 extension quietly kept bifacial excluded, and the industry finally got stability — just as AD/CVD moved the fight to a different statute entirely.
The practical lesson for anyone buying modules: exclusions and exemptions in trade law are provisional by nature. I've advised customers for years to write tariff-escalation and tariff-relief clauses into supply contracts, and the bifacial saga is the case study I cite. A distributor who promised 201-era pricing on bifacial product in October 2019 without such a clause ate a 25 percent duty. That is a six-figure surprise on a utility-scale container order.
AD/CVD 2024: The Southeast Asia Cases
While Section 201 is a blunt safeguard, antidumping and countervailing duty law is surgical: it targets specific countries and specific exporters, with rates set by Commerce Department investigation. The 2024 petitions alleged that Chinese-headquartered manufacturers had shifted cell and module production to Cambodia, Malaysia, Thailand, and Vietnam to circumvent earlier China-specific orders. Preliminary countervailing and antidumping determinations arrived through late 2024, and final determinations in 2025 imposed duties that ranged from manageable for cooperative exporters with clean books to prohibitive — in some cases triple-digit — for companies Commerce found uncooperative.
Three features of AD/CVD matter more than the headline rates. First, the duties are company-specific, so two modules from the same country can carry wildly different rates. Second, critical-circumstances findings can make duties retroactive 90 days, which is why import surges before determinations can backfire. Third, scope rulings decide what counts as a subject cell or module, and those rulings have reshuffled supply chains before — the 2022 Auxin petition and the subsequent two-year moratorium on new tariffs from those four countries is the example every procurement manager remembers.
What It Means for Buyers in 2025 and Beyond
Layer the regimes together and a clear sourcing hierarchy emerges. Domestic modules carry no duties and increasingly competitive pricing as IRA-backed factories ramp. Imports from non-subject countries carry only the declining 14 percent-ish Section 201 rate. Imports from the four Southeast Asian countries carry company-specific AD/CVD exposure that must be verified per exporter, per shipment, with a customs broker who actually reads the scope rulings. And bifacial product, wherever made, still enjoys its Section 201 exclusion — the one durable outcome of the four-year courtroom loop.
Our desk now treats tariff status as a line item on every quote, right next to wattage and warranty. I tell customers the same thing every week: the cheapest module on a spec sheet is only cheapest if you can prove what duty it carries at the port. The arithmetic above — $3,000 versus $6,000 for the same 10 kW of glass — is why that proof is worth the paperwork.
Related Guides and Sourcing Resources
Tariff-aware buying starts with knowing what is actually available domestically: browse our Silfab, Boviet, and JA Solar collections for current inventory, and see the bifacial module collection for the dual-glass products at the center of the exclusion saga. For the demand side of the ledger, the solar ROI calculator shows how a 14 percent duty moves payback by months, not years. Installers structuring commercial bids should also review our commercial solar installation cost breakdown and the state solar incentives tracker, since the ITC domestic-content adder now interacts directly with sourcing decisions.
Frequently Asked Questions
What is the Section 201 tariff on solar panels?
Section 201 of the Trade Act of 1974 lets the President impose temporary safeguard tariffs when imports seriously injure a domestic industry. Solar cells and modules were hit in January 2018 at 30 percent, stepping down 5 points per year to 15 percent in 2021. The safeguard was extended in 2022 for four more years at rates starting at 14.75 percent and stepping down by 0.25 points annually.
Are bifacial solar panels exempt from Section 201 tariffs?
As of the 2022 extension, bifacial modules remain excluded from the Section 201 safeguard tariffs. The exemption has been granted, revoked, reinstated by court order, and revoked again on paper multiple times between 2019 and 2021, which is why the trade press calls it a saga. Importers should confirm current status with a customs broker before pricing a project.
What were the 2024 AD/CVD tariffs on Southeast Asian solar imports?
In 2024 the Commerce Department ran antidumping and countervailing duty investigations into cells and modules from Cambodia, Malaysia, Thailand, and Vietnam. Preliminary determinations landed late in 2024 and final rates in 2025, with country- and company-specific duties that in some cases exceeded 100 percent and, for non-cooperating exporters, far higher. The practical effect was a sharp shift of U.S. module sourcing toward domestic factories and non-subject countries.
What is the SEGA and how did it relate to solar tariffs?
The Solar Energy Industries Association and allied manufacturers have used various legislative vehicles, sometimes referenced alongside broader trade bills, to shape tariff policy. The core industry ask has been consistent: protect domestic cell manufacturing without taxing imported cells that U.S. module assemblers need, which is why the Section 201 cell quota of 2.5 GW per year matters as much as the headline tariff rate.
How much do tariffs add to the cost of a solar panel?
At the extended Section 201 rate of 14.75 percent, a module with a 0.30 dollar per watt import price carries about 4.4 cents per watt of safeguard duty. AD/CVD exposure can be far larger: a 50 percent duty on that same module adds 15 cents per watt. For a 10 kW residential array, the difference between those two scenarios is roughly 1,060 dollars of module cost.
Do tariffs apply to U.S.-made solar panels?
No. Section 201 and AD/CVD duties apply to imported cells and modules, not domestically manufactured ones. That differential is the entire policy intent, and it is why U.S. module assembly capacity expanded so rapidly after the Inflation Reduction Act stacked manufacturing tax credits on top of the tariff wall.
