What the latest federal guidance means for tax credit eligibility, supply chains, and project timing
As battery energy storage system, or BESS, adoption accelerates across the U.S., new federal guidance is reshaping how these projects are developed, sourced, and financed.
In February 2026, the U.S. Treasury released updated guidance around Foreign Entities of Concern, or FEOC. These rules directly affect whether energy projects qualify for key federal tax credits.
For organizations considering battery storage, understanding these changes is important. Incentives remain strong, but eligibility is now more closely tied to where project components come from and how they are sourced.
WHAT ARE FEOC RULES?
FEOC rules were introduced to reduce reliance on certain foreign supply chains, particularly those connected to countries such as China, Russia, Iran, and North Korea, within U.S. energy projects.
Under these rules:
- Projects may lose eligibility for tax credits if they rely too heavily on restricted suppliers.
- A new calculation, called the Material Assistance Cost Ratio, or MACR, is used to determine compliance.
- Developers must evaluate the origin and cost share of key system components.
In simple terms, If too much of your project is sourced from restricted entities, incentives may no longer apply.
WHY THIS MATTERS MORE FOR BATTERY STORAGE
Battery energy storage systems are especially affected by FEOC guidance because of current global supply chain realities.
The battery industry has historically relied heavily on international manufacturing and materials.
The new rules apply stricter thresholds to storage than to some other technologies.
Projects beginning construction in 2026 must meet approximately 55% compliant sourcing, with that threshold increasing over time.
This means:
- Greater scrutiny on battery suppliers and system components
- Increased importance of early procurement strategy
- Potential project delays if compliance isn’t addressed upfront
WHAT HAS CHANGED WITH THE LATEST GUIDANCE
The February 2026 update provides clarity, but not complete certainty.
What’s improved:
- Introduction of safe harbor frameworks to simplify compliance calculations
- Ability to rely on existing domestic content guidance for initial compliance
- More practical approach to tracking components (not full raw material traceability)
What remains uncertain:
- Final definitions of key terms like “prohibited foreign entity”
- Additional rules and thresholds expected in future updates
- Evolving standards for supplier certification and documentation
WHAT THIS MEANS FOR YOUR PROJECT
The latest FEOC guidance doesn’t eliminate opportunity, but it does raise the bar for planning.
Key considerations for organizations exploring BESS:
- Incentive eligibility is no longer just financial—it’s supply chain dependent
- Vendor selection matters more than ever
- Delays in planning can limit sourcing flexibility and increase risk
- Early engagement helps preserve both incentives and timelines
Organizations that start early can:
- Align procurement with compliance requirements
- Secure eligible equipment and partners
- Reduce risk of rework, delays, or lost incentives
BOTTOM LINE
Battery storage remains one of the fastest-growing and most strategic investments in energy, but the path to capturing its full value is becoming more complex.
The latest FEOC guidance reinforces a clear takeaway:
Project timing, supplier strategy, and compliance planning are now just as important as the technology itself.
Have questions about how FEOC impacts your project?
Our team can help you evaluate sourcing strategies, incentive eligibility, and next steps.
