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Introduction to Revisions of UL 9540A:2025

Explore the latest UL 9540A:2025 updates on thermal runaway testing for battery energy storage systems (BESS) with expert insights from UL Solutions.

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THE CONTENT OF THIS WEBINAR IS FOR GENERAL INFORMATION PURPOSES ONLY AND IS NOT INTENDED TO CONVEY LEGAL OR OTHER PROFESSIONAL ADVICE.

Watch now: Introduction to Revisions of UL 9540A:2025

Join LaTanya Schwalb, principal engineer at UL Solutions, for an in-depth look at the latest updates to UL 9540A:2025, Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems (BESS). This webinar covers essential changes that affect testing protocols, performance criteria and safety requirements across cell, module, unit and installation levels.

Watch now to stay ahead of the curve in battery safety compliance.

Webinar date: June 13, 2025

Speaker: LaTanya Schwalb, principal engineer, Energy and Industrial Automation

 

What you’ll learn

  • New definitions and clarified criteria for thermal runaway propagation
  • Updated test methods for various battery chemistries, including lead-acid, nickel-cadmium, and high-temperature sodium
  • Revised performance benchmarks for module casing temperatures and flame spread
  • Enhanced protocols for rooftop, wall-mounted, and open garage installations
  • Reporting requirements and integration of previous test-level summaries

Who should watch 

This session is ideal for engineers, safety professionals, compliance officers, and stakeholders involved in the design, testing and certification of energy storage systems.

 

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LaTanya Schwalb

LaTanya Schwalb is an expert in product safety certification and UL Standards for stationary batteries, energy storage systems, fuel cells and hydrogen generators.

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