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UL 9540A sixth edition tightens battery storage fire rules

The 2026 refresh of UL 9540A brings large-scale fire testing to battery storage just as NFPA 855, the EU Batteries Regulation, FERC inverter standards and NHTSA electric powertrain rules converge on a demanding new compliance baseline for energy and mobility.

UL 9540A sixth edition tightens battery storage fire rules