Fluence Energy, Inc. announced the company has successfully completed a large-scale fire test for its sixth-generation energy storage products that surpassed the industry's UL9540A safety testing requirements, designed to limit the spread of a fire in energy storage deployments. Results of the large-scale fire test were issued in a report by independent engineering firm DNV, who witnessed the test as well as a separate unit-level UL9540A test. In partnership with the National Fire Protection Association (NFPA), the energy storage industry developed product regulations and testing recommendations to ensure that energy storage products are designed to limit potential fire to defined subsystems and not propagate thermal runaway.

Fluence's large-scale fire test extended beyond the performance standards of UL9540A by initiating an extreme fire event in a Fluence Cube and testing whether the thermal runaway event propagated to neighboring Cubes, which were configured to simulate a typical energy storage system.