This CPD session on Understanding fire safety in battery energy storage systems (BESS) provides an in-depth overview of what an energy storage system is, focusing on prevention, detection and suppression strategies. Participants will learn about the current international standards like NFPA855, UL9540 and the layered approach to detection and suppression. This session will explore the importance of early gas and smoke detection and the role of extinguishant panels. Case studies from the UK, China, and the US identify real-world failures and reinforce the need for proactive fire safety measures to protect people, infrastructure, and the environment.