UL 9540A Test Method for Battery Energy Storage Systems (BESS) UL 9540A is the only consensus standard explicitly cited in NFPA 855 for large-scale fire testing and the only national standard in the U S and Canada for fire safety testing methods for battery ESS
UL9540A: 2025 Interpretation of Thermal Runaway Fire Propagation Test . . . UL 9540A evaluates system safety in the event of thermal runaway fire propagation and is the only consensus standard referenced for large-scale fire testing in NFPA 855 The release of UL9540A:2025 marks a shift from reactive response to proactive prevention in energy storage safety
Large Scale Testing of Energy Storage Systems: Fire Protection and . . . Objectives of 9450A – What does it do? Evaluate fire characteristics of a battery energy storage system that undergoes thermal runaway Data generated will be used to determine the fire and explosion protection required for an installation of a battery energy storage system Document fire and deflagration hazards
UL 9540A: Test Method for Evaluating Thermal Runaway Fire Propagation . . . UL 9540A is a testing procedure that evaluates and documents the fire performance of stationary ESS and was introduced as a compulsory requirement for all residential systems intended for installation in indoor locations as part of UL 9540 Ed
Test Method for Evaluating Thermal Runaway Fire Propagation in Battery . . . FIRE TESTING TECHNOLOGY 2 UL 9540A: Test Method for Evaluating Thermal Runway Fire Propagation in Battery Energy Storage Systems The primary measurement is heat release rate using oxygen consumption calorimetry which is core to FTT’s product range and expertise FTT UL 9540A Test FTT supplies and installs the UL 9540A and trains clients in
Evolving Large-Scale Fire Test Methods and Regulatory Demands UL 9540A has been referred to as the large-scale fire test (LSFT) by NFPA 855 to evaluate the thermal runaway fire hazards of the ESS Navigating the ESS safety landscape and challenges of unrecognized methodologies in compliance standards
What is the UL9540A Test Method? UL 9540A Explained UL 9540A, Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems, evaluates the fire and explosion hazards associated with BESS in order to determine the fire and explosion protection required
Fire safety: UL Solutions tests thermal runaway to new UL9540A standard . . . The new edition of UL9540A aims to further enhance battery storage fire safety at an industry-wide level, and more technology providers have conducted large-scale fire testing (LSFT) UL Solutions has updated its fire safety testing for battery storage to reflect changes to the UL9540A test method