San Diego Zoo Pumped Hydro Storage Facility, San Diego, California

San Diego Zoo is a pumped hydro storage facility located in San Diego, California, United States. With a capacity of 1 MW, it is a small-scale energy storage system that plays a role in local grid management. The facility is owned and operated by EDF Renewables Distributed Solutions, a key player in renewable energy and storage solutions. The facility operates under U.S. regulatory frameworks including NFPA 855 for energy storage system safety and UL 9540/9540A for battery and thermal runaway testing. Pumped hydro storage is a mature technology that uses water reservoirs to store and generate electricity, offering long-duration storage and grid flexibility. In California, such facilities support the state's ambitious renewable energy goals and help manage peak demand. San Diego Zoo's pumped hydro storage contributes to environmental sustainability by enabling greater integration of solar and wind power. It provides grid services such as peak shaving and frequency regulation, reducing reliance on fossil fuel peaker plants. The facility's location near urban areas underscores the importance of safety protocols to mitigate thermal runaway risks, though pumped hydro is inherently safer than lithium-ion systems.

Pumped hydro storage facilities like San Diego Zoo are generally low-risk for thermal runaway compared to lithium-ion systems. However, siting near populated areas requires careful environmental planning to manage water usage and ecological impacts. In California, regulations such as NFPA 855 and UL 9540 ensure safety standards are met. The facility's grid interconnection role supports renewable energy integration, reducing greenhouse gas emissions and enhancing grid resilience.