UL 9540A:2026Test method for evaluating thermal runaway fire propagation in battery energy storage systems03/13/2026RevisedUN R100.05Uniform provisions concerning the approval of vehicles with regard to specific requirements for the electric power train09/26/2025RevisedUL 2743:2025Standard for portable power packs09/24/2025RevisedUL 9540:2023Standard for energy storage systems and equipment06/28/2023Revised
United States
RevisedUL 9540A:2026
Test method for evaluating thermal runaway fire propagation in battery energy storage systems
- Effective
- 03/13/2026
- Scope
- Cell, module, unit and installation level testing
- Key requirements
- A test method standard, not a certification scheme; data supports fire and installation approvals
- Languages
- EN
- Market
- United States
Change history
Applies to product lines
- Last verified
- 2026-08-19
- Version
- v1
- Official source
- View source