Viridi RPSLinkIN Energy Storage System Receives UL 9540 Listing

Why It Matters

The UL 9540 listing removes a key safety barrier, unlocking indoor battery storage for critical infrastructure and expanding the market for resilient, low‑carbon energy solutions.

Key Takeaways

• UL 9540 listing validates Viridi's indoor battery safety
• No fire suppression needed for commercial and industrial installations
• Enables deployment in occupied, space‑constrained facilities
• Demonstrated at DOE’s Oak Ridge Lab and a 600‑kWh medical institute
• Opens new market for resilient, decarbonizing indoor energy storage

Pulse Analysis

The UL 9540 certification, administered by TÜV Rheinland, is the industry’s gold standard for indoor battery safety. By passing the UL 9540A test—designed to simulate worst‑case fire scenarios—Viridi demonstrated that its RPSLinkIN 480‑V system can operate without emitting smoke, gas, or fire. This level of validation is rare among residential‑scale packs and signals to developers that the technology meets the most stringent fire‑risk criteria, reducing the need for costly secondary suppression systems.

Safety has long been the Achilles’ heel of deploying lithium‑ion storage in densely populated or mission‑critical environments. With the UL 9540 listing, Viridi’s system can be placed in occupied facilities such as hospitals, data centers, and research labs where space is at a premium. The ability to mount the battery floor‑mounted and indoor eliminates the requirement for dedicated outdoor enclosures, opening up previously inaccessible real‑estate and enabling faster, more flexible rollout of resilience solutions.

The market implications are significant. As utilities and large enterprises pursue grid‑edge resilience and carbon‑reduction goals, the demand for compact, fire‑safe storage is accelerating. Viridi’s certification positions it to capture a share of this emerging segment, especially in sectors where downtime is costly. Moreover, the successful deployments at Oak Ridge National Laboratory and the Hauptman‑Woodward Institute provide tangible case studies that can accelerate adoption across the broader energy‑storage ecosystem.