Post by UL Solutions

As energy storage systems (ESS) grow in scale and complexity, safety must be proven at the system level — under real and extreme conditions. At UL Solutions, we are working closely with industry leaders like SolaX Power to advance UL 9540A:2026 methodologies — bringing greater realism and confidence to energy storage safety validation. Deflagration testing (UL 9540A:2026 Annex C) A full-scale ORI 5MWh system was tested with real lithium-ion cells driven into thermal runaway, evaluating gas release, accumulation and ignition under severe conditions. The system maintained structural integrity, with controlled pressure relief and no secondary hazards — demonstrating predictable and engineered system response. Large-scale fire propagation testing A multi-container ESS configuration was subjected to an extreme fire scenario to assess propagation, thermal impact and system-wide performance. Results showed no fire spread to adjacent units, maintained key safety functions and preserved structural stability — validating system-level safety architecture. Through these advanced test programs, UL Solutions provides: ✔ UL 9540A testing (current and next-generation standards) ✔ Customized test design and execution for real-world scenarios ✔ Independent engineering assessment and risk insights ✔ Support for compliance, insurance and project bankability As energy storage continues to power the global energy transition, system-level safety validation is essential — and UL Solutions can help. Learn more about our UL 9540A testing services: https://s.ul.com/4eZTFQF #EnergyStorage #BESS #Safety #UL9540A #BatterySafety #Testing #RiskManagement