Oak Ridge National Laboratory deploys Viridi fail-safe battery system for live-grid control research

A federal research lab in Oak Ridge, Tennessee, has been testing a battery storage system built by Viridi to see how well new grid-control technology holds up in real-world conditions, not just in a simulated lab. The lab, part of Oak Ridge National Laboratory, moved from indoor testing to an outdoor site where it connected physical battery hardware to the actual power grid.

The battery unit involved, called the RPS 150, stores about 147 kilowatt-hours of energy and can charge or discharge at 30 kilowatts. It's designed with a "fail-safe" architecture meant to stop thermal runaway (a chain reaction that can cause battery fires) at the individual cell level, which is why the manufacturer says it can be used in occupied buildings and tight spaces where standard lithium-ion batteries often run into safety and permitting problems. The system carries several UL safety certifications, and multiple units can be linked together for larger installations.

For homeowners, this isn't a product or rebate you can act on right now. It's a research project focused on how utilities might better coordinate batteries and other distributed energy resources, like rooftop solar or home batteries, across the grid as demand grows. The lab plans to publish full results in the coming months, and the work is described as the first phase of an ongoing collaboration. If safer, more fire-resistant battery designs like this eventually reach the consumer market, they could matter for anyone considering a home battery, but that step is not part of this project.