Why compliance is more complex than it appears
What actually defines domestic content compliance
A “Made in the US” label does not necessarily mean a project meets domestic content requirements per rules set by the government. In today’s PV and battery energy storage (BESS) supply chains, where sourcing spans multiple regions and suppliers, this distinction has real implications across procurement, compliance, and project economics.
This is particularly relevant in the United States under the Inflation Reduction Act (IRA), where domestic content directly impacts tax credit eligibility. But the issue goes beyond incentives. What appears compliant at a high level can break down under closer examination, creating exposure not only for tax credits, but also for supplier selection, documentation, and investor confidence.
The misconception
There is a common assumption that assembly location determines compliance. In reality domestic content rules go deeper. They depend on the origin and value of individual components, not just where the final assembly takes place. As scrutiny increases, this gap between perception and reality is becoming harder to ignore.
Where projects go wrong
In many projects, domestic content assessments rely too heavily on supplier declarations. Component origin is not always verified, and calculation methodologies are not always clearly defined or consistently applied. As a result, what appears compliant may not hold up under detailed review.
The real complexity
PV and BESS supply chains are multi-tiered, often spanning multiple regions and suppliers. Tracing component origin across this structure is not straightforward. It requires deciding whether to assess full bills of materials or on which sampling to rely, and applying guidance such as DOE Notice 2025-08 correctly. Without a structured approach, critical details are easy to miss.
What investors and tax authorities need
At the point of financing or audit, assumptions are no longer enough. Investors and tax authorities expect clear documentation, transparent methodology, and consistency across all supporting data. What matters is not whether a project appears compliant, but whether it can be demonstrated under review.
Moving from assumption to verification
A structured verification approach brings clarity to this process. By assessing component origin, applying a consistent calculation framework, and documenting findings clearly, projects can move from assumption to compliance that can be supported.
STS supports this by combining independent verification with real supply chain visibility. Rather than relying solely on supplier-provided information, STS triangulates commercial records, production data, and logistics documentation to validate component origin at the level required by DOE guidance. This creates a traceable, evidence-based view of domestic content, particularly when subject to investor or tax authority review.
Closing the gap between perception and proof
As domestic content becomes a defining factor in project economics, the question is shifting. It’s no longer a question of where something was assembled, it’s whether it can be proven when it matters.
How STS Can Help
STS provides independent domestic content verification to ensure suppliers are capable of manufacturing domestically and that claims are accurate, documented, and defensible. We identify key components, verify origin and manufacturing location, validate calculations in line with DOE guidance, and cross-check commercial, production, and logistics records to deliver a clear, evidence-based view of compliance.