Know the risks. Although similar to conventional substations, battery energy storage system (BESS) facilities have a risk of explosion and stranded energy, presenting unique challenges to fire service agencies.

If you are called to an incident involving an CPS Energy BESS facility, always approach with caution. Use a standoff distance of at least 100 feet for all CPS Energy BESS facilities. Do NOT proceed beyond the fenceline of any BESS facility without guidance from a qualified on-site facility subject-matter expert (SME). The SME should understand the system configuration and battery chemistry under adverse conditions.

Review data to guide operational decisions. The fire alarm/protective system annunciator and battery management system provide the best sources of data.

Consider the potential for a deflagration to occur. Do not be complacent if there is smoke but fire is not showing. This can, in fact, be a more dangerous situation, as it may indicate the development of an explosive environment.