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    Double Butte energy storage project

    PRMF storage
    Double Butte energy storage project

    AES’ Double Butte storage project is a proposed battery energy storage facility in Menifee, California that will provide a critical, cost-effective source of reliable power for the region’s electric grid.

    Energy storage enables power generated during the day to be stored and delivered during periods of high demand, which helps stabilize the grid and reduce California’s reliance on fossil fuels. By delivering stored power when it is most needed, the Double Butte storage system will be critical to accelerating California’s transition to achieving 100% carbon-free energy by 2045.

    Project overview

    Power generation icon

    500 MW

    2,000 MWh storage capacity

    Residential icon

    Enough stored energy to power nearly 375,000 California homes for four hours


    Menifee, California

    Project details

    • Containerized lithium-ion battery energy storage system

    • 27 acres of vacant land with adjacent existing industrial uses will host the project

    • Features metal storage containers that house racks of battery modules equipped with insulation and robust safety monitoring and management systems

    • Connects to the grid via nearby existing Southern California Edison Valley Substation

    • AES is developing the project and will be the long-term owner and operator of the facility

    Expected project timeline


    Economic and environmental benefits


    Utilizes land near existing electric grid infrastructure, minimizing the need for long overhead transmission lines


    Designed in accordance with the latest applicable codes, safety standards, security, lighting, landscaping and noise requirements

    AES Icon for money: grey dollar sign surrounded by circle of AES colors

    Economic benefits include new local tax revenue and local job creation during construction and operations

    Visual simulations




    Environmental and technical studies

    The project will be reviewed under the California Environmental Quality Act. Environmental and technical studies for the project will include a Phase I Environmental Site Assessment, hydrology, geotechnical, cultural resources, land, topography, biological, wetlands, economic impact and other studies. AES will work with the relevant government and regulatory agencies to mitigate potential environmental impacts from the project.



    Community impact and engagement

    AES is committed to being a good neighbor and partner to the communities where our projects are located. This includes informing and engaging project stakeholders and the public throughout all phases of the project. AES also supports local contractors, community organizations and programs.



    Phone (toll-free): 800-396-8481

    Stay updated

    If you are interested in receiving updates about AES’ Double Butte energy storage project, please fill out and submit this form.

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