Fire Safety Requirements (NFPA 855)

In the US, fire safety for battery storage systems is governed primarily by the NFPA 855 fire code and UL 9540A testing standard, which set requirements for separation distances between battery units, hazard mitigation analysis, and large-scale fire testing. The higher thermal stability of sodium-ion cells like PHENOGY's, compared to many lithium-ion systems, can support compliance with these requirements.