IRS Issued Battery Tax Credit Guidance in February
New rules for energy storage projects impact how homeowners and developers qualify for federal tax credits.
Updated on Sept. 22, 2026 in Electric Vehicles
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Should the government require strict ownership disclosures for tax credits despite potential supply chain hurdles?
The IRS released Notice 2026-15 on February 12, 2026, setting new material assistance cost ratio thresholds for battery and storage technology tax credit eligibility. These standards require project owners to verify battery component and material sourcing to secure federal credits under Sections 45Y, 48E, and 45X.
Why it matters
These sourcing requirements ensure that battery projects meet strict federal eligibility standards, which directly impact the financial feasibility of home and grid-level energy storage installations. As material assistance thresholds rise through 2030, project owners must navigate complex supply chain audits to maintain tax credit access.
The 2026 material assistance threshold is set at 55%, with an increase to 75% by 2030. Meanwhile, global investment in critical minerals saw a 9% decline in 2025, and the top three refining nations are expected to hold an 82% supply share through 2035.
The players
IRS
The federal agency responsible for administering tax law and enforcing eligibility rules for energy-related tax credits.
Treasury
The department overseeing financial policy and the publication of federal tax credit regulations.
The details
Procurement teams are now requiring suppliers to provide comprehensive ownership and sourcing information during the request for proposals stage to meet federal mandates. Contract terms also force suppliers to report any changes in ownership or material sourcing facts to buyers within a specified timeframe. Additionally, IP licensing agreements with specified foreign entities modified after July 4, 2025, may disqualify projects from receiving tax credits.
Timeline
July 4, 2025: IP licensing agreements after this date can trigger project disqualification.
2025: Global investment in critical minerals decreased by 9%.
February 12, 2026: The IRS released Notice 2026-15.
2026: The current energy storage tax credit eligibility threshold is 55%.
2030: The threshold for tax credit eligibility is scheduled to reach 75%.
The Home Front
These guidelines clarify compliance requirements under the Inflation Reduction Act to ensure that clean energy projects remain eligible for federal support. This move follows a broader trend of tightening sourcing regulations for battery technology as the market prepares for long-term domestic supply goals.
If you are planning a home energy storage installation, consult with your installer to ensure their hardware meets current federal sourcing standards. Keep copies of all equipment procurement documentation in your project file to verify credit eligibility for your tax professional.
The takeaway
Qualifying for battery tax credits now requires proof of sourcing that meets the 55% material assistance threshold. Homeowners should verify that their equipment contractors have documented the ownership and material origin of the battery components used in their installations.
Further reading
Learn more about evolving standards for residential and grid-scale power by visiting our Electric Vehicles section.
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Should the government require strict ownership disclosures for tax credits despite potential supply chain hurdles?
