FEOC Recapture Keeps the Battery Tax Credit at Risk for a Decade, Reaching Warranty and Service Contracts

A July 2026 analysis from the law firm Foley Hoag reframes how commercial battery projects should think about the Section 48E investment tax credit. According to the firm, the credit is not secured once a project’s cells clear a one-time procurement test. Under the Prohibited Foreign Entity rules, the credit remains exposed to full recapture for as long as ten years after a system is placed in service, and the exposure extends beyond the battery purchase into the contracts that keep the battery running.

The procurement threshold. A storage project must show that a set share of its manufactured-product costs comes from outside a specified foreign entity, a figure the rules call the material-assistance cost ratio. Foley Hoag notes that the threshold for 2026 is 55 percent. This is the part of the rule the market has already absorbed. Developers understand the procurement arithmetic and have spent the past year rearranging supply chains around it, including the reshoring of cell production documented in coverage of United States manufacturing reaching roughly 50 gigawatt-hours of annual capacity by the end of 2026.

The recapture window. The less-priced element, in Foley Hoag’s telling, is the recapture provision. The firm stresses that the FEOC rules are not a single procurement snapshot. If a developer makes payments in any of the ten years following the placed-in-service date under a contract that gives a specified foreign entity effective control over the facility, the full credit becomes subject to recapture. A one-time equipment question becomes a decade-long behavioral one. The battery does not have to change and the ownership does not have to change; a payment under a contract can be enough.

What effective control can reach. The significance of the recapture provision, according to Foley Hoag, is that the risk extends to warranty, service, and maintenance arrangements, not only to the cell purchase itself. That moves the analysis out of the procurement department and into the service agreement. The arrangements a hardware owner treats as routine sit inside this perimeter: an exclusive maintenance agreement with the manufacturer, a battery-management-system license that only the original vendor can service, a warranty that ties the owner to the supplier’s technicians for years. Morgan Lewis has published a parallel analysis of how the FEOC rules are reshaping energy-storage tax-credit eligibility, though the details of its treatment are not summarized here.

Warranty periods overlap the recapture period. Commercial storage systems are typically sold with multi-year warranties and service contracts. Those obligations run through the same window in which an applicable payment can trigger recapture. A buyer who signs a long-term service-and-warranty package with a vendor controlled by a specified foreign entity may, on paper, be creating recapture exposure with each payment over the life of the contract.

The practical result is a documentation burden that outlives the sale. A developer cannot certify FEOC compliance at commissioning and file it away. Under Foley Hoag’s reading, the compliant status has to hold through service invoices, warranty claims, and software-license renewals across the recapture window. Tax-equity investors, who bear the recapture risk, are the parties most likely to want that assurance in writing before they fund a project.

How the rule could sort vendors. The following is an illustration of the logic rather than a reported outcome. Consider a buyer comparing two systems with identical hardware costs. One vendor offers a cheaper battery but bundles an exclusive, long-term maintenance and licensing arrangement running back to a specified foreign entity. The other charges more up front but keeps its warranty, service, and software chain free of specified-foreign-entity control. On sticker price, the first would win. On a tax-credit-adjusted basis over the recapture window, the first would carry a clawback exposure the second does not. For a tax-equity-backed project, an underwriter could conclude that only the second can be financed without a reserve against recapture, and such a reserve, if a lender required one, could offset whatever the cheaper hardware saved. This comparison is analytical, not an observed transaction.

None of this appears on a specification sheet. UL 9540A listings, cycle life, and round-trip efficiency do not capture whether a system’s long-term service obligations will keep its tax credit intact. On Foley Hoag’s reading, the compliance question has shifted from a property of the equipment to a property of the contract stack behind it.

The firm’s work is guidance rather than a filed dispute, and no recapture enforcement action has been reported. Treasury could adjust its treatment of effective control, and the statutory thresholds could be revisited in a future legislative cycle. For now, the language is on the books, and tax-equity underwriters tend to price the language they can read rather than the relief they hope for.

The buyers positioned to absorb this most cleanly are those who can document a service and warranty chain free of specified-foreign-entity control from the outset. On the logic Foley Hoag lays out, that documentation is becoming an asset in its own right.

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