How SunSpec Specifications & Certifications Provide a Cybersecurity Framework for FCC Conditional Approval of Foreign-Made Inverters
The FCC’s recent action on foreign-produced power inverters marks a significant shift in cybersecurity expectations for distributed energy resources. While conditional approval remains a federal determination, manufacturers must now demonstrate that their products, software, and supply chains address critical security risks. This white paper examines how SunSpec specifications, open standards, and certification programs align with many of the FCC’s identified cybersecurity concerns, where they provide strong evidence of compliance, and where additional documentation may still be required. It also explores how manufacturers can leverage independent certification to strengthen cybersecurity, support regulatory readiness, and navigate an evolving global energy landscape.
Secure SunSpec Modbus: A Familiar Interface Ready for a new Reality
This white paper introduces Secure SunSpec Modbus, which builds on the interoperability and vendor-neutral data models of SunSpec Modbus while adding encrypted communications, mutual authentication, and role-based access control. The paper explores how Secure SunSpec Modbus enables secure, scalable communications across utilities, virtual power plants, DER manufacturers, microgrids, and end users. It also examines practical deployment use cases, certification and testing, and how a standardized security framework can preserve the simplicity and interoperability of SunSpec Modbus while meeting the cybersecurity requirements of an increasingly connected grid.