The TerraGen Power-Sanborn Battery Energy Storage System is a 50,000kW energy storage project located in Mojave, Kern County, California, US.

The project was announced in 2020 and will be commissioned in 2022.


The TerraGen Power-Sanborn Battery Energy Storage System is being developed by Southern Power. The project is owned by Southern Power (100%), a subsidiary of Southern.

The key application of the project is grid supportive services.

Contractors involved

Southern Power is the owner. Southern Power is the developer.

Additional information

The Project is a part of 770 MW of battery energy storage project proposals by Southern California Edison (SCE). The project will help solve reliability issues anticipated to impact on the California grid when a number of ageing natural gas power plants reach their retirement, as well as helping to integrate larger shares of renewable energy that in turn will help replace those gas plants.

About Southern Power

Southern Power Company (Southern Power), a subsidiary of Southern Company is a power infrastructure company which provides clean energy solutions. Its portfolio of generating plants includes natural gas, wind, solar and biomass delivering clean, safe, reliable and affordable generation. The company offers electricity for municipalities, electric cooperatives, investor-owned utilities and other energy customers throughout the US. Southern Power own generating facilities in Alabama, California, Florida, Georgia, Maine, Minnesota, Nevada, New Mexico, North Carolina, Oklahoma and Texas. The company seeks to work in partnership with energy provider companies and sell electricity through long term contracts. Southern Power is headquartered in Atlanta, Georgia, the US.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.