Oak Ridge National Laboratory has installed a commercial battery energy storage system from manufacturer Viridi at its grid research facility in Tennessee, marking a new phase in federal efforts to test advanced power grid control technologies under live operating conditions.

Deployment at GRID-C Field Test Site

The U.S. Department of Energy's Oak Ridge National Laboratory integrated Viridi's RPS 150 platform — a 146.7 kWh battery energy storage system — into its GRID-C field test site. The facility is designed to evaluate grid technologies under real-world operating conditions rather than purely simulated environments, giving researchers direct access to live-grid dynamics that laboratory bench testing cannot replicate. The installation represents a formal strategic partnership between ORNL and Viridi, bringing a commercially available storage product into a federal research context.

Research Objectives

The partnership is focused on validating next-generation AC/DC architectures alongside advanced grid control strategies. Testing both alternating-current and direct-current configurations in a single research environment reflects broader industry interest in hybrid grid topologies, which are increasingly relevant as distributed energy resources — including solar generation and battery storage — are integrated at greater scale into utility networks. ORNL's GRID-C site provides the infrastructure to stress-test these configurations under conditions that mirror the complexity of real utility operations, rather than idealized laboratory setups.

Beyond architecture validation, the research is oriented toward improving grid resilience and reliability, two qualities that have drawn heightened attention from federal energy agencies as extreme weather events and shifting generation mixes place new demands on the bulk power system.

Viridi's Role and the Fail-Safe Design

Viridi's RPS 150 platform was selected for integration into the ORNL facility, with reporting noting the system's fail-safe characteristics as a relevant feature for a research environment where operational continuity and safety under test conditions are priorities. The 146.7 kWh capacity places the system in a scale range typical of commercial and light-industrial deployments, making findings from the ORNL research potentially transferable to a broad segment of the storage market.

The partnership positions Viridi's technology within a federal validation pathway, which can carry significance for commercial adoption — national laboratory endorsement through demonstrated performance in a DOE research setting can influence procurement decisions by utilities and grid operators evaluating storage platforms.

Broader Context

The ORNL deployment adds to a growing body of DOE-supported research aimed at accelerating the integration of energy storage into grid operations. Federal laboratories have increasingly served as intermediaries between emerging energy technologies and utility-scale deployment, providing independent, data-rich environments where performance claims can be evaluated against actual grid behavior. The GRID-C facility's emphasis on real-world conditions is consistent with that role.

As grid operators across the country manage a transition toward higher shares of variable renewable generation, the ability to validate storage control strategies under live conditions — rather than relying solely on modeling — takes on practical importance. Research outcomes from installations such as this one at ORNL are expected to inform both technical standards and operational frameworks that will govern how storage systems interact with the wider grid.