OEM Commercial Energy Storage System With UL 9540A Thermal Runaway Certification

The UL 9540A Thermal Runaway Tested Energy Storage System is a lithium battery energy storage solution designed for commercial, industrial, renewable energy, and grid-connected applications. The system incorporates battery management, thermal management, fire protection, monitoring, and safety control technologies to help evaluate and mitigate fire and thermal runaway risks.

UL 9540A is the recognized test method for evaluating thermal runaway fire propagation in battery energy storage systems. Testing can generate safety data related to thermal runaway, heat release, gas generation, fire propagation, and explosion hazards to support ESS installation and fire protection strategies.

Key Features

• UL 9540A Thermal Runaway Testing – Designed for evaluation according to applicable UL 9540A test requirements.

• LFP Battery Technology – Lithium iron phosphate cells provide a stable chemistry option for stationary energy storage applications.

• Intelligent BMS – Monitors battery voltage, current, temperature, and other operating parameters for active battery protection.

• Thermal Management – Integrated cooling and temperature monitoring help maintain appropriate battery operating conditions.

• Thermal Runaway Monitoring – Multi-level monitoring and protection functions help detect abnormal temperature and battery operating conditions.

• Fire Safety System – Can integrate fire detection, alarm, suppression, gas detection, and other safety functions according to project requirements.

• Modular Architecture – Flexible battery capacity, PCS power, enclosure, and system configuration for different ESS projects.

• North American Application – Designed for energy storage projects subject to applicable U.S. and Canadian safety and fire code requirements.

UL 9540A Thermal Runaway Testing

UL 9540A evaluates the fire and explosion characteristics of battery energy storage systems capable of undergoing thermal runaway. Depending on the applicable edition and system configuration, testing can evaluate battery behavior at different levels, including cell, module, unit, and installation levels.

Testing can provide information on:

• Thermal runaway characteristics

• Cell-to-cell thermal runaway propagation

• Heat release and temperature

• Flammable gas generation

• Fire propagation between battery components or units

• Deflagration or re-ignition hazards

• Fire protection system performance

• Installation-level fire behavior

The resulting data can support manufacturer installation instructions, separation-distance assessments, and fire and explosion protection strategies.

Applications

This UL 9540A-oriented energy storage system can be used for:

• Commercial and industrial energy storage

• Utility-scale battery energy storage

• Solar PV + battery storage

• Renewable energy integration

• Grid-connected BESS

• Peak shaving and load management

• Microgrid energy storage

• Backup and emergency power

• Distributed energy storage

• EV charging energy management

Safety and Fire Protection

The system can be configured with multiple layers of safety protection, including intelligent BMS monitoring, temperature detection, thermal management, fire detection, gas detection, alarm systems, and fire suppression.

UL Solutions identifies UL 9540A as the fire and explosion testing method referenced by the 2026 edition of NFPA 855 and the 2024 International Fire Code (IFC). UL 9540A testing can therefore provide important technical data for ESS fire-safety evaluations and permitting processes.