Which fire suppression systems are recommended for indoor energy storage systems (ESS)?

• A. Automatic sprinklers, clean agent suppression systems, and foam suppression systems.
• B. Water mist suppression systems, deluge sprinklers, and halogenated extinguishing agents.
• C. Dry chemical powder systems only.
• D. Wet chemical suppression systems.

Answer: (A)

Fire protection for indoor energy storage systems must handle heat, electrical/electrical equipment fires, and any liquid fuels or leaked electrolytes. Automatic sprinklers provide rapid heat absorption and help contain the fire early, reducing growth and protecting surrounding areas. Clean agent suppression systems extinguish fires affecting energized equipment without using water, which protects sensitive ESS components and minimizes electrical damage or downtime. Foam suppression systems lay down a foam blanket that cools and smothers liquid fires, helping to control any flammable liquid involved in the storage or electrolyte leaks. This combination gives robust coverage for the main hazards in ESS rooms: heat release, electrical/equipment fires, and liquid-fire risks. Other approaches that rely solely on powders or kitchen-style wet chemicals don’t address all ESS-specific hazards as effectively and can cause residue damage or be unsuitable for electrical equipment.