Large鈥慡cale Fire Testing for Battery Energy Storage Systems
Large鈥憇cale fire testing (LSFT) ensures battery energy storage systems are designed to contain fires, limit spread, and support emergency planning and public safety.
Large鈥憇cale fire testing (LSFT) helps ensure battery energy storage systems are designed to prevent fire from spreading beyond a single enclosure in worst鈥慶ase scenarios, strengthening safety for communities, workers, and first responders.
Key takeaways about large鈥憇cale fire testing include:
- Testing worst鈥慶ase fire scenarios, assuming a full fire in one battery enclosure rather than a small, isolated failure.
- Verifying fire does not spread to nearby battery units when systems are installed according to manufacturer guidance.
- Supporting updated safety standards, including new LSFT requirements in the 2026 edition of NFPA 855 and updates to UL 9540A.
- Providing critical data for emergency planning, such as spacing, temperatures, and responder safety considerations.
- Strengthening confidence in system design, helping regulators and communities understand how modern battery systems are engineered to contain and manage fire risk.
Resource added May 5, 2026
(PDF download)
