Installers Guide to U.S. Made Solar Panels in 2026
- Sarah Lozanova
- a few seconds ago
- 7 min read
American-made solar panels comes up in more project conversations this year. Homeowners ask about it. Commercial clients ask too. The phrase means different things depending on who you ask.
For installers, the real question goes beyond where are solar panels made. It's whether a specific module qualifies for tax credits, and whether it passes new sourcing rules. Those are two different tests with two different consequences.
This guide explains what U.S. solar panel manufacturers are building in 2026, how American solar panel manufacturers fit into domestic content rules, and where FEOC requirements affect project eligibility. The goal is simple: help installers separate marketing claims from documentation that can hold up during procurement, financing, and tax-credit review.
At GreenLancer, we help contractors adapt to these fast-moving changes with streamlined permitting, fast plan set delivery, and expert project support, so you can keep installations moving even when market conditions shift.
What Counts as American-Made Solar Panels in 2026?
American-made sounds like one claim. It's actually several, and mixing them up can cost a client a tax credit.
Assembled in USA: final panel assembly happened at a US facility.
Made with US cells: the photovoltaic cells, not just the frame and glass, came from a US factory.
Domestic content compliant: the panel meets IRS cost percentage rules for the domestic content bonus.
FEOC and PFE compliant: the panel passes prohibited foreign entity rules under current law.
Fully domestic: polysilicon, ingot, wafer, cell, and module production are all US-based, for that specific product line.
Claim | What It Usually Means | What It Doesn't Prove |
Assembled in USA | Final assembly happened domestically | Domestic content qualification |
Domestic content compliant | Meets IRS cost percentage rules | FEOC or PFE compliance |
FEOC/PFE compliant | Passes prohibited foreign entity rules | Domestic content bonus eligibility |
Fully domestic | Major supply chain steps are US-based | Applies to every product a company sells |
A fully domestic claim describes a specific product line, not necessarily a manufacturer's whole catalog. Always check the product, not just the brand.
Solar panels assembled in the USA may still rely on imported cells, wafers, glass, backsheets, junction boxes, or other components.
Domestic Content Solar Modules vs. FEOC Compliance
Domestic content and FEOC compliance sound related. They're not the same test, and they don't carry the same consequences.
Two separate tests, two separate outcomes. Domestic content can increase the credit value. FEOC and PFE rules can determine whether the credit is available at all.
The FEOC rules for solar installers walk through the material assistance cost ratio in detail, including the 40% Clean Electricity MACR threshold for qualified facilities beginning construction in 2026, under interim IRS guidance in Notice 2026-15.
A panel can meet domestic content rules and still fail FEOC. It can pass FEOC and still miss the domestic content threshold. Check both, on every project.
The 48E Domestic Content Bonus Credit, Explained
The domestic content bonus adds real value on top of the base 48E investment tax credit. The required percentage isn't fixed though. It climbs every year.
For projects beginning construction in 2025, the adjusted percentage is 45%. It rises to 50% for 2026, and 55% for 2027 and beyond, according to legal analysis of the current safe harbor tables. Confirm the applicable percentage against your project's begin-construction date and the IRS domestic content bonus credit guidance.
The bonus itself adds up to 10 percentage points to the credit rate. Full value requires meeting prevailing wage and apprenticeship requirements. Treasury's guidance on the domestic content bonus also updated how solar cost percentages get calculated under the safe harbor tables, including new options for projects using domestic wafers.
For more on how these credits evolved, see the history and future of the solar tax credit in 2026.
Checklist: Before You Claim the Domestic Content Adder
Written domestic cost percentage documentation from your supplier
Confirmation of which safe harbor table applies to your begin-construction date
Steel and iron structural components verified 100% US-manufactured
Prevailing wage and apprenticeship compliance confirmed, if claiming the full 10 points
The right safe harbor table depends on the project's begin-construction date and current IRS guidance. GreenLancer's team can review your documentation before you submit. Complete the form below.
Where Are Solar Panels Made? The US Supply Chain Is Still Uneven
The US now has 69.9 GW of solar module manufacturing capacity online, according to SEIA's supply chain dashboard. That's up from just 8 GW before federal manufacturing incentives took effect, more than a 750% increase.
Module capacity isn't the whole story though. Cell and wafer capacity have historically lagged behind module assembly, and manufacturers still need to do the accounting work to prove FEOC status even when their supply chain checks out, as Canary Media reported earlier this year.
More available panels doesn't mean every panel qualifies. A module can come off a US assembly line and still miss domestic content thresholds or FEOC requirements. Capacity and compliance are separate questions, so check both.
Top US Solar Panel Manufacturers for 2026 Projects
For installers comparing solar panel manufacturers in the USA, the key question is no longer just where a module is assembled. It's whether the specific product line comes with usable domestic content and FEOC documentation.
More Vertically Integrated US Manufacturing
Qcells / Hanwha: the Cartersville, Georgia facility is designed to produce ingots, wafers, cells, and finished modules under one roof, while the Dalton facility adds module capacity. Combined US output is targeted at 8.6 GW by the end of Q3 2026, according to Solar Power World. Qcells describes this expansion as making it the largest US crystalline silicon module manufacturer.
First Solar: a major US manufacturer, though its modules use CdTe thin-film technology rather than crystalline silicon TOPCon cells. Verify current capacity figures against First Solar's Q1 2026 Form 10-Q before quoting numbers to a client.
US Assembly and Cell-Stage Manufacturers
Several other manufacturers operate US facilities, though the specific product line and documentation should be verified for every project. This group includes Silfab, Heliene, Mission Solar, T1 Energy, Suniva, ES Foundry, and Maxeon.
Why US-Made Module Availability Varies by State
Regional distributor coverage, lead times, and shipping distance all affect which manufacturers show up first in a given state. A supplier well-stocked in Georgia might run longer lead times in the Pacific Northwest. Check regional distributor inventory alongside your usual supplier relationships instead of assuming nationwide availability.
Tariffs and Trade Cases Installers Should Watch in 2026
Tariff and trade enforcement actions can shift module pricing and availability with little notice. One example from earlier this year shows the risk.
US Customs and Border Protection found in June 2026 that Waaree Energies evaded antidumping and countervailing duty orders by mislabeling the origin of certain solar cells sourced from Vietnam and Malaysia, according to pv magazine USA.
The finding carries cash deposit rates up to 271.28% on the specific covered entries, not a blanket rate on all Waaree imports, and the company has disputed the finding with appeal rights pending. The larger lesson for installers is to ask about the specific product, cell origin, and shipment pathway, not just the country listed on a spec sheet.
Checklist: Verifying a Supplier's US-Made and FEOC Status
Signed FEOC and PFE certification on file
Manufacturing facility location confirmed, not just headquarters
Ask directly whether the specific module, cell origin, and shipment pathway carry current antidumping or countervailing duties. Background on how these thresholds work is available from the Congressional Research Service.
Cross-checked against your FEOC compliance process, outlined in FEOC rules for solar installers
Domestic content thresholds, FEOC documentation, and supplier verification all add real risk to equipment selection. GreenLancer's engineering and permitting team can review equipment packages, plan sets, and project documentation before costly procurement or submission mistakes slow a job down. Complete the form below to get started.
FAQs on U.S. Solar Panel Manufacturers
Get answers to common questions about domestic PV modules and the impact of the new tariffs.
Are solar panels actually made in the USA?
Yes, though the supply chain still has gaps. The US has 69.9 GW of module manufacturing capacity online as of mid-2026, but upstream cell and wafer capacity is smaller and growing more slowly.
What percentage of a solar panel needs to be domestic to qualify for the 48E adder?
The adjusted percentage for the domestic content bonus is 50% for projects beginning construction in 2026, rising to 55% in 2027 and beyond. Confirm your project's exact begin-construction date before relying on a specific number.
Is a panel assembled in the US automatically domestic content compliant?
No. Final assembly location and domestic content qualification are two different things. A panel can be assembled domestically using imported cells and still fall short of the cost percentage threshold.
Does a US-made panel automatically satisfy FEOC requirements?
No. FEOC and PFE compliance depend on ownership, sourcing, and the material assistance cost ratio, not just where assembly took place. Request documentation for both separately.
Which manufacturers offer US ingot-to-module solar panels?
Qcells' Cartersville facility is currently the closest example, producing ingots, wafers, cells, and modules at one site. Other manufacturers cover different stages of the supply chain, so check the specific product line rather than assuming full vertical integration.
How much does the domestic content adder increase my credit value?
Up to 10 percentage points on top of the base credit rate, contingent on meeting prevailing wage and apprenticeship requirements. For a broader look at how this affects project economics, see the commercial solar panel cost breakdown and incentives guide.
Is there enough US-made module supply to meet 2026 demand?
Module capacity has grown quickly, and SEIA's domestic manufacturing initiative tracks ongoing expansion across the supply chain. Actual availability still varies by product type, region, and season, so build lead time into project planning.
What documentation should I request from a module supplier?
A signed FEOC and PFE certification, domestic cost percentage data if claiming the adder, and confirmation of the manufacturing facility location. Keep records for at least six years, since MACR determinations carry a six-year statute of limitations under interim IRS guidance.
Do residential installers need to worry about domestic content rules?
Cash-sale installers usually aren't the ones claiming 48E, so the rules affect them indirectly. Lease and PPA partners do claim the credit though, so ask how they're handling compliance. The guide to government solar incentives covers how these programs fit together for different ownership structures.
How are tariffs affecting US-made vs. imported panel pricing?
Trade cases like the Waaree ruling can add significant costs to specific products with little warning. US-made panels aren't subject to the same antidumping and countervailing duty risk, which is one reason procurement teams are prioritizing domestic sourcing even before factoring in tax credits.
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