Informational Bulletin on the UL 9540 Safety Standard and the UL 9540A Test Method

This SEAC document provides a high-level overview of the Safety Standard “ANSI/CAN/UL 9540 Energy Storage Systems and Equipment” and the UL thermal runaway fire propagation test method “ANSI/CAN/UL 9540A Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems” (BESS).