Which standards govern safety for stationary battery storage systems and their packs?

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The safety of stationary battery storage systems and their packs is ensured by standards that address both the individual cells and modules as well as the complete system, across international and UL family frameworks. UL 9540 sets the safety requirements for energy storage systems and equipment as a whole, covering how systems should be designed, installed, and tested to manage risks like thermal events, fire, and integration with electrical installations. UL 1973 focuses on the safety of battery systems used for stationary applications, addressing the safety of the cells and packs themselves and how they behave under fault and abuse conditions. IEC 62619 provides safety requirements specifically for secondary cells and batteries containing alkaline or acidic electrolytes used in stationary storage, ensuring cell-level safety and compatibility with stationary use. IEC 62626 family offers general safety requirements for energy storage systems and equipment, giving a broad framework for system-level safety, testing, and risk management. Together, these standards cover both the components and the overall system, aligning requirements for safe operation, installation, and maintenance. The other options mix standards that address unrelated topics such as communication protocols or general electrical installations, rather than focusing on the safety aspects of stationary storage themselves.