IRA Domestic Content Bonus: How FEOC-Compliant Solar Panels Increase Your Customer's Tax Credit
Most installers and homeowners know about the 30% federal Investment Tax Credit (ITC). Fewer are taking full advantage of the domestic content adder — an additional 10 percentage points that can push a residential system's credit to 40%. In 2026, with ITC guidance more settled and manufacturers actively pursuing compliance, this bonus is real money and worth structuring your equipment procurement around.
What the Domestic Content Adder Is
The Inflation Reduction Act established a domestic content bonus credit for solar energy systems that meet specific U.S. manufacturing thresholds. For residential and commercial systems, qualifying projects can claim an additional 10% adder on top of the base 30% ITC — bringing total federal tax credit eligibility to 40% of system cost.
For a $25,000 residential system, that difference is $2,500 in additional tax credit. For a commercial project in the hundreds of thousands of dollars, the stakes are considerably higher.
FEOC Compliance: What It Means and Why It Matters
The domestic content rules are tied to two criteria. First, all steel and iron components must be produced in the United States. Second, manufactured products — which include solar modules, inverters, and racking — must meet a minimum percentage of U.S.-manufactured content by cost.
Alongside domestic content, the IRA introduced Foreign Entity of Concern (FEOC) restrictions. Components from FEOC-designated countries and entities are excluded from qualifying for the bonus. In practice, this targets manufacturers with significant ties to China, Russia, North Korea, and Iran. As of 2026, the FEOC rules have material implications for module sourcing — a panel manufactured in Southeast Asia by a Chinese-owned parent company may not clear the FEOC bar even if it was physically assembled outside China.
For installers, this means you need to look beyond country of final assembly and understand the supply chain behind the cells and wafers in the modules you are specifying.
Which Panels Qualify
Panels that qualify for the domestic content adder in 2026 are typically those manufactured in the United States using domestically sourced or non-FEOC cells and wafers. The IRS has issued guidance (Notice 2023-29 and subsequent updates) that sets out safe harbor cost percentages for each component category.
SEG Solar is one example of a FEOC-compliant panel available through Solwel. SEG manufactures modules at its facility in Texas, which addresses both the domestic manufacturing requirement and the FEOC supply chain concern. For installers who want a straightforward path to the 40% credit without navigating complex supply chain attestations, panels like SEG's Texas-made lineup are the lowest-friction option.
When evaluating any panel for domestic content eligibility, ask the manufacturer for a written attestation confirming FEOC compliance and U.S. content percentages. Do not rely on marketing language alone — the documentation burden falls on the taxpayer (your customer) and ultimately on you to provide the paperwork that supports the credit.
Why It Matters for Project Economics
The domestic content adder changes the competitive math on equipment selection. A FEOC-compliant panel may carry a modest premium over an imported alternative, but when that premium is offset by a 10-point increase in tax credit eligibility, the net-of-credit cost can be lower on the compliant module.
Presenting this to a homeowner or commercial buyer requires a simple calculation: take the system cost, apply 40% vs. 30%, and show the net difference. In most cases, the domestic content path wins on total cost of ownership — and it is a differentiator that positions you as an advisor, not just an installer.
How to Document the Bonus
To support the domestic content adder on a customer's tax return, you should gather and retain:
- Manufacturer's written attestation of domestic content percentages by component
- FEOC compliance declaration from the manufacturer
- Itemized project cost breakdown separating eligible components
- IRS Form 3468 (Investment Credit), completed with the domestic content election indicated
Advise your customers to work with a tax professional familiar with IRA energy credits. The credit is claimed by the taxpayer, not the installer — but the documentation you provide is what makes it defensible in an audit.
The Bottom Line for Installers
The domestic content adder is not theoretical — it is available now, and the panel manufacturers who qualify for it are actively selling through distributors. If you are not already asking your distributor which panels in their lineup carry FEOC-compliant documentation, that conversation is worth having before your next proposal goes out. Solwel stocks SEG Solar modules and can provide the compliance documentation you need to support your customers' tax credit claims.