Data Centers

Fluence/AES Alamitos Energy Storage Center

Fluence/AES Alamitos Energy Storage Facility


  • 40,018-square-foot
  • Fully sprinklered
  • 35 energy storage battery cores
  • Three individual control areas
  • 35 inverters/transformers flanking the structure’s east and west exterior
  • New adjacent switchgear yard connected to inverter/transformers via underground duct banks
  • Six rooftop 130-ton cooling units
  • Three rooftop 20-ton heating units
  • Three smaller three-ton condenser units
Located in Long Beach, California the Fluence/AES Alamitos Energy Storage Facility is one of the world's largest BESS facilities in operation today. A Battery Energy Storage System (BESS) can be defined as an arrangement of batteries that collect energy generated by a power plant, stores it, and then releases that energy to the power grid at a later time when existing capacities are exceeded. Fully charged the batteries will supply a reliable power source during times of peak demand of up to 100 MW for four hours (400 MWh) of energy to tens of thousands of homes and businesses in milliseconds. BESS also support a cleaner energy future for Southern California Edison (SCE) customers by enabling increased integration of renewable energy, such as solar and wind.

This is an unmanned facility except for personnel performing necessary operational maintenance. Support spaces include a maintenance room, storage room, unisex toilet room, janitor’s closet, and three fire riser rooms.


Corgan is the leader in high-performance data centers, revered by the most advanced clients in the world for breakthrough solutions.

Corgan was the first formalized practice in the industry and, for decades, our team has led the industry with first-to-market innovations.

Our practice is designed around what we call “the speed of trust” — being responsive to client needs while providing a collaborative process of solution-finding. User-centered design and detailed craftsmanship are hallmarks of our work. We routinely meet the evolving challenges of the most demanding clients around the globe — leading with foresight, evidence-based design, and innovative delivery.

Together, we build the infrastructure that powers the world’s most critical technologies. Together we build long-term client relationships.

#1 Data Center Architect in the United States

Building Design + Construction, 2019