Beaumont Energy Storage Facility

The Beaumont Energy Storage Project in Beaumont, California provides critical grid reliability services to the local area while supporting the integration of renewable energy resources across the state. The 100 MW / 400 MWh stand-alone facility was developed by Terra-Gen to provide a stable, flexible load to the California electric grid, helping balance supply and demand with minimal losses.

Mortenson was selected by Terra-Gen as the engineering, procurement, and construction (EPC) partner for the project, which utilizes BYD MC Cube battery container technology.

The project is located on an urban, constrained site within the Beaumont industrial zone, surrounded by active commercial uses and nearby residential areas. Given the tight footprint and surrounding development, the project team implemented a detailed logistics plan, disruption-avoidance measures, and traffic control strategies to ensure safe, efficient construction and delivery.

Community engagement was a priority throughout the construction process. Mortenson maintained open lines of communication with nearby businesses and residents to minimize disruptions, coordinate construction activities, and address concerns as work progressed.

The BYD battery system incorporates a robust fire detection and alarm network, requiring the testing and verification of more than 11,000 individual devices. This extensive testing effort required close coordination and collaboration between the Mortenson site team and the local fire authority having jurisdiction to ensure full compliance with applicable fire and life-safety requirements.

Mortenson worked closely with Terra-Gen, the California Independent System Operator, and the battery supplier to commission the facility. Commissioning activities included overnight operations to align with grid conditions when sufficient load was available.

The Beaumont Energy Storage Project was successfully energized in 2024, demonstrating how utility-scale battery storage can be safely and effectively delivered in urban environments while supporting grid reliability, renewable integration, and positive community outcomes.