Solar Industry Tariff Updates: What Installers Need to Know in 2026

Published July 27, 2026 — PES Supply Industry Brief

The solar trade landscape shifted dramatically in the first half of 2026. Between the expiration of Section 201 safeguard tariffs, new anti-dumping petitions against South Korean manufacturers, and the full enforcement of Foreign Entity of Concern (FEOC) rules under the One Big Beautiful Bill Act (OBBBA), installers and EPCs face a procurement environment unlike any in the industry's history. Understanding how these overlapping tariff frameworks interact is now essential for pricing projects, qualifying for tax credits, and selecting compliant equipment.

At PES Supply, we track these regulatory changes closely because they directly affect the availability and cost of the 50,000+ SKUs from 169 authorized brands in our catalog. This guide breaks down the major tariff developments shaping the second half of 2026 and what they mean for your bottom line.

Section 201 Safeguard Tariffs: Expired but Under Review

The Section 201 safeguard tariffs on crystalline silicon photovoltaic cells, originally imposed in January 2018, officially terminated on February 6, 2026. These tariffs included a tariff-rate quota on imported solar cells and a duty increase on imported modules, and were designed to give domestic manufacturers time to become competitive against foreign imports.

However, the story does not end with expiration. In mid-2026, the U.S. International Trade Commission (ITC) launched an investigation into whether the Section 201 safeguard action was effective in facilitating a positive adjustment to import competition by the domestic industry ([Sandler, Travis & Rosenberg](https://www.strtrade.com/trade-news-resources/str-trade-report/trade-report/march/impact-of-section-201-safeguard-on-solar-cell-imports-under-review)). The outcome of this review could inform future trade remedy proceedings and influence policy discussions around domestic manufacturing support.

Section 201 Tariff Exemption Extended for PV Modules

On July 20, 2026, the U.S. International Trade Commission announced an extension of the Section 201 tariff exemption covering photovoltaic cell modules, moving the end date from August 1, 2026 to February 1, 2027. The exemption applies to overseas-assembled photovoltaic systems that contain core components sourced from China. While this extension provides a short-term operational buffer for parts of the solar-plus-storage export chain, it should be understood as a limited bridge rather than a long-term policy reset.

Anti-Dumping and Countervailing Duties: The Southeast Asia Crackdown

The most consequential tariff development for installers remains the Commerce Department's finalization of anti-dumping and countervailing duty (AD/CVD) tariffs on solar cells and modules imported from Cambodia, Malaysia, Thailand, and Vietnam. Finalized on April 21, 2025, these duties vary by country and company, with some rates exceeding 3,500% ([GreenLancer](https://www.greenlancer.com/post/us-manufactured-solar-panels)).

The impact has been profound. These four countries previously supplied the majority of modules entering the U.S. market. The tariffs effectively reshaped the supply chain overnight, forcing distributors and EPCs to pivot toward U.S.-assembled modules or source from countries not subject to the duties.

New Petition Targets South Korean Imports

On June 18, 2026, a new AD/CVD petition was filed against solar cells and modules from South Korea by American Manufacturers for Energy Resilience (AMER). According to supply chain platform Anza, which aggregates pricing data across 55 modules from 19 suppliers, this petition is already influencing market dynamics ([pv magazine USA](https://pv-magazine-usa.com/2026/07/10/u-s-assembled-module-prices-steady-at-0-30-w/)). The supply chain for U.S.-assembled modules reveals significant international dependency: 24 of 55 tracked modules use Malaysian polysilicon, 15 use domestic U.S. polysilicon, and 13 use Chinese polysilicon. Cell origin spans 10 different countries, with cells from Kenya and the Philippines making up the largest shares.

FEOC Rules: The New Compliance Frontier

The OBBBA, signed on July 4, 2025, enacted the Foreign Entity of Concern (FEOC) provision, which attempts to reduce reliance on supply chains tied to covered foreign nations — primarily China, but also Russia, North Korea, and Iran. Starting January 1, 2026, solar and energy storage projects must meet new sourcing thresholds or lose their Investment Tax Credit (ITC) value entirely ([Palmetto Installer Guides](https://help.palmetto.finance/en/articles/12524213-solar-energy-plan-avl-all-things-hardware)).

FEOC Thresholds by Project Type

The FEOC requirements are calculated separately for PV and battery storage using the Domestic Content table from IRS Notice 2025-08:

Year	PV Only	PV + Battery or Battery Only
2026	40%	55%
2027	45%	60%
2028+	+5% each year	+5% each year

In practical terms, at least 40% of a PV-only project's value and 55% of a battery-inclusive project's value cannot be tied to a Foreign Entity of Concern for projects beginning construction in 2026. IRS guidance issued in February 2026 confirms that FEOC compliance is mandatory for any project beginning construction in 2026 or later that intends to claim the ITC.

Domestic Content Bonus: A 10-Point ITC Adder

Separate from but related to FEOC compliance, the domestic content bonus offers an additional 10 percentage points on the ITC for projects that meet specific U.S.-sourcing requirements. The bonus is voluntary — no project is required to meet domestic content thresholds — but for those that do, it represents significant tax savings.

Two Tests for Domestic Content Qualification

Projects must pass two distinct tests to earn the domestic content bonus ([Renewapower](https://renewapower.com/insights/ira-domestic-content-solar-bonus), [BDO USA](https://www.bdo.com/insights/tax/irs-creates-safe-harbors-for-domestic-content-calculations)):

• Steel and Iron Requirement (100% U.S.-Made): All structural steel and iron in the project — including PV module racking, piles, ground screws, and rebar in foundations — must be melted and poured domestically. This test is binary: 100% or nothing.
• Manufactured Products Requirement (Cost Percentage Test): A required share of manufactured-product costs — modules, inverters, racking components, and related equipment — must be domestic. The threshold escalates with construction-start date: 45% for projects starting construction in 2025, 50% for 2026 starts, and 55% for 2027 and later.

Notably, fasteners (nuts, bolts, screws, washers, clamps, and fittings) are treated as manufactured-product components rather than structural steel, meaning they do not need to clear the 100% bar but their cost does feed the percentage calculation ([Melfast](https://www.melfast.com/blog/what-exactly-do-solar-installers-need-to-document-for-the-tax-credit-bonus)).

Documentation Requirements

For each component counted toward domestic content, the IRS expects three documents from the manufacturer:

1. A signed domestic content certification, signed under penalties of perjury by someone who can bind the manufacturer.
2. Manufacturing-location information confirming where each component was produced.
3. Cost records supporting the percentage calculation.

Taxpayers may rely on the safe harbor tables under IRS Notice 2025-08 until the Treasury issues final safe harbor tables, which are due by December 31, 2026 ([McDermott Will & Schulte](https://www.mcdermottlaw.com/insights/the-one-big-beautiful-bill-act-navigating-clean-energy-tax-credits-in-a-new-era/)).

Impact on Panel Pricing and Procurement

The combined effect of these tariff frameworks has created a bifurcated market. Globally, module prices have plunged to historic lows — Tier-1 mono TOPCon panels trade FOB China at $0.085 to $0.095 per watt, down 38% from the 2022 peak. But for U.S. buyers, the picture is markedly different.

Median U.S.-assembled module pricing stabilized at $0.30 per watt in Q2 2026, with an interquartile range of $0.280/W to $0.325/W, according to Anza data released July 9, 2026 ([pv magazine USA](https://pv-magazine-usa.com/2026/07/10/u-s-assembled-module-prices-steady-at-0-30-w/)). In Q1 2026, median pricing sat at $0.28/W as FEOC rules and stacked anti-dumping duties reset the market. A Chinese-made module with a base cost of $0.15/W can see tariffs and compliance costs push its landed price to $0.23/W or higher, while domestically produced alternatives may carry a base price of $0.25/W or more.

What This Means for Your Project Economics

Module Origin	Approximate Cost/W (FOB)	Compliance Status
China (FOB)	$0.085–$0.095	Not FEOC-compliant; subject to AD/CVD duties
Southeast Asia (non-Chinese polysilicon)	~$0.20	May qualify depending on cell origin
U.S.-assembled	$0.28–$0.325	FEOC-compliant; eligible for domestic content bonus
Fully domestic (U.S. manufactured)	Up to $0.47	Fully FEOC-compliant; maximum bonus eligibility

These figures, drawn from BloombergNEF and Anza data, illustrate why origin now matters as much as spec when pricing a project. The same physical module can trade at vastly different effective costs depending on where its polysilicon, cells, and assembly originate.

ITC Landscape After OBBBA

The OBBBA fundamentally altered the federal tax credit landscape. The 30% residential Investment Tax Credit under Section 25D terminated for systems placed in service after December 31, 2025. Homeowners who purchase systems with cash or a loan in 2026 receive no federal tax credit, extending typical payback periods from 6–10 years to 8–14 years ([SurgePV](https://www.surgepv.com/blog/us-solar-tax-credit-2026-guide)).

However, the Section 48E commercial ITC remains at 30% for projects that begin construction by July 4, 2026, with bonuses available for:

• Domestic content: +10 percentage points (50% FEOC-compliant cost share in 2026)
• Energy community: +10 percentage points for qualifying brownfield or fossil-fuel communities
• Low-income: +10–20 percentage points via IRS capacity allocation

For businesses and third-party system owners, stacking these bonuses can push the effective ITC rate to 50% or higher — but only if equipment sourcing meets FEOC and domestic content requirements. Projects that fail the FEOC test lose the ITC entirely, making component provenance a make-or-break procurement decision.

Safe Harbor Deadlines and Construction Start

The IRA's safe harbor provision caps the period during which a solar project can claim the full 30% ITC. The critical deadline is July 4, 2026 — projects must have begun construction by this date to preserve eligibility under the current rules. "Began construction" means either physical work of a significant nature or the 5% safe harbor (paying or incurring at least 5% of total project cost).

Projects that secured a valid 2025 construction start have runway through 2029 and locked in the friendlier 45% domestic content bar. Nonprofits must either complete projects by December 31, 2027, or commit through safe harbor by July 4, 2026, which extends the installation deadline to 2030 ([Resonant Energy](https://www.resonant.energy/blog)).

Practical Guidance for Installers

1. Verify FEOC Compliance Before Procurement

Before placing module orders, confirm with your supplier that the polysilicon, cell, and assembly origins meet FEOC thresholds. Many panel manufacturers owned by or tied to Foreign Entities of Concern have been removed from approved vendor lists. Request FEOC compliance documentation at the purchase order stage.

2. Plan for Domestic Content Documentation Early

Request signed domestic content certifications from manufacturers during the procurement process, not after installation. PES Supply can help coordinate documentation for compliant components across our solar panels, inverters, and racking and mounting categories.

3. Hedge Against Tariff Uncertainty

With the South Korea AD/CVD petition pending and potential Section 232 polysilicon tariffs on the horizon, structure supplier contracts that defer full commitment until final tariff levels are confirmed. Quote validity should be capped at 30 days in the current environment.

4. Factor Delivery Timelines Into Project Schedules

With global supply chains in flux, plan for 7-10 business days delivery on stocked components. Order early to avoid project delays, especially for FEOC-compliant modules where the compliant supply pool is smaller.

Conclusion

The 2026 tariff landscape rewards installers who understand the rules and penalizes those who do not. FEOC compliance, domestic content documentation, and tariff-aware procurement are no longer optional — they are the difference between a profitable project and one that loses its tax credit eligibility entirely. By staying informed and working with a distributor that tracks these changes, you can navigate the complexity and keep your projects on track.

Explore PES Supply's full selection of FEOC-compliant and domestically sourced equipment across 50,000+ SKUs from 169 authorized brands. Browse our solar panels, inverters, battery storage, and balance of system categories to find compliant components for your next project.