The Tehachapi – BESS is an 8,000kW energy storage project located in Tehachapi, California, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was commissioned in 2014.


The Tehachapi – BESS was developed by Southern California Edison . The project is owned by Southern California Edison (100%), a subsidiary of Edison International .

The key applications of the project are electric supply capacity, renewables capacity firming, transmission congestion relief, transportable transmission/distribution upgrade, deferral and voltage support.

Contractors involved

LG Chem and Southern California Edison have delivered the battery energy storage project.

Additional information

The Tehachapi Energy Storage Project is installed at the Monolith substation near Tehachapi, California and connected to the 66kV bus, featuring 604,832 lithium-ion battery cells, housed in 10,872 modules of 56 cells each, stacked in 604 racks arranged in rows. The Storage system has been funded with $24,978,264.00 by Federal/National American Recovery and Reinvestment Act of 2009 – RD&D under Department of Energy, Office of Electricity – ARRA Smart Grid Demonstration Program. The project costs about $50 million with matching funds from SCE and the energy department.

About Southern California Edison

Southern California Edison Co (SCE), a subsidiary of Edison International, is an electric utility that generates, procures, sources, and supplies electricity. The company generates electricity from natural gas, hydro, nuclear, solar, and fuel sources. SCE also sources energy and local grid support from third parties such as cogeneration, biomass, small hydro, wind, geothermal, solar plants, and California Department of Water Resources . It also assists the customers in managing their electricity bills and promotes energy efficiency. The company serves interdepartmental, railroads and railways, industrial, agricultural, public street and highway lighting, commercial, and residential customers in Central, Coastal and Southern California. SCE is headquartered in Rosemead, California, 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.