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how much grid scale battery storage does caiso have

How Much Grid Scale Battery Storage Does CAISO Have?


California Independent System Operator (CAISO) is responsible for managing the flow of electricity for 80 percent of California’s power grid. As the state continues to increase its use of renewable energy sources, grid-scale battery storage has become an important component of the energy system. In this article, we will explore how much grid-scale battery storage CAISO currently has.

Current Grid-Scale Battery Storage Capacity

CAISO’s Latest Report

According to CAISO’s latest report, the grid-scale battery storage capacity in California has reached 867 megawatts (MW) as of June 2021. This capacity is spread across various projects in the state, including standalone battery storage facilities and batteries integrated with renewable energy projects.

Largest Grid-Scale Battery Storage Projects

Some of the largest grid-scale battery storage projects in California include the Moss Landing Energy Storage Facility, which has a capacity of 300 MW, and the Gateway Energy Storage project, which has a capacity of 230 MW. These projects play a crucial role in providing grid stability and balancing the intermittency of renewable energy sources.

Future Expansion Plans

CAISO’s Long-Term Outlook

CAISO has ambitious plans to increase grid-scale battery storage capacity in the coming years. The organization’s long-term outlook includes adding over 3,000 MW of new storage capacity by 2026. This expansion will support the state’s goal of reaching 100 percent clean energy by 2045 and help mitigate the impacts of extreme weather events on the grid.

Integration with Renewable Energy

As California continues to ramp up its deployment of solar and wind power, integrating grid-scale battery storage becomes essential for maintaining grid reliability. CAISO is actively working with developers to ensure that new renewable energy projects are paired with storage solutions to maximize their effectiveness.

Policy Support

To facilitate the growth of grid-scale battery storage, California has implemented various policies and incentives, such as the Assembly Bill 2514, which requires utilities to procure a certain amount of energy storage capacity. These policies are expected to drive further investment in battery storage projects across the state.


In conclusion, CAISO currently has 867 MW of grid-scale battery storage capacity, with plans for significant expansion in the near future. As California continues its transition to a clean energy future, grid-scale battery storage will play a crucial role in ensuring grid reliability and stability. With supportive policies and ongoing technological advancements, the state is well-positioned to further increase its battery storage capacity in the years to come.

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