FOR IMMEDIATE RELEASE
Media Contact:
Alexander Morris
General Manager
amorris@cacommunitypower.org
California Community Power Declares Commercial Operations for the First Eight-Hour Energy Storage Project in California
Kern County, CA — June 18, 2026 — Today, California Community Power (CC Power) marked a major milestone with the recognition of commercial operations for the Tumbleweed Energy Storage facility in Kern County, California. CC Power is a joint powers authority formed on behalf of nine (9) Community Choice Aggregators (CCAs) to procure wholesale power resources through joint action. The participating members of the Tumbleweed project include CleanPowerSF, Peninsula Clean Energy, Redwood Coast Energy Authority, San José Clean Energy, Silicon Valley Clean Energy, Sonoma Clean Power, and Valley Clean Energy. CC Power celebrated this milestone with a ribbon-cutting ceremony alongside local officials, community leaders, and industry partners. The project is the first eight-hour utility-scale battery energy storage system in California—ushering in a new era of grid reliability and clean energy integration.
Developed by REV Renewables (REV), an LS Power company and a leading developer, owner, and operator of renewable energy and storage projects, the project was brought online ahead of California Public Utilities Commission (CPUC) Mid-term Reliability requirements. The early delivery underscores REV’s and CC Power’s shared commitment to accelerating the state’s clean energy transition while enhancing grid resilience.
The Tumbleweed facility represents a significant shift in how battery storage supports the electric grid. While energy storage projects just five years ago primarily provided ancillary grid services lasting seconds to minutes, the industry has evolved toward four-hour systems capable of delivering energy over extended periods to support grid operations and reliability. At eight hours, Tumbleweed is among the first projects capable of bulk-shifting solar energy generated during the day to power homes and businesses overnight, helping to reduce emissions while strengthening grid reliability. Tumbleweed, and other forthcoming long-duration storage resources like it, will help further reduce emissions in California, while strengthening the electrical grid’s reliability and supporting local economic development.
“The Tumbleweed project is a landmark achievement for California’s clean energy transition and the first eight-hour battery energy storage system in CAISO,” said Ed Sondey, Chief Executive Officer of REV Renewables. “It reflects REV’s leadership in developing innovative storage solutions at scale and marks another important milestone as we continue to grow our business and support a more reliable, resilient grid.”
According to Alexander Morris, General Manager of CC Power, “we’re pleased to have partnered with REV Renewables and have been impressed with their successful development of this innovative project. The Tumbleweed long-duration storage project represents CC Power’s first operational resource and serves as an example of the innovative and emerging technology resources that CC Power was formed to procure on behalf of its members. We are excited about this milestone moment for California, what it says about the role of CCAs in proactively advancing the state’s goals for clean, reliable energy, and how joint action through CC Power can be a valuable tool to achieve those goals.”
The Tumbleweed Energy Storage facility supports California’s ambitious clean energy and decarbonization goals by enabling greater use of renewable energy resources while enhancing grid reliability during periods of peak demand.
About CC Power:
California Community Power is a joint powers authority comprised of nine California CCAs. CC Power combines its members’ buying power to procure new, large-scale, complex, emerging technology, hard-to-find, or CCA-owned resources to advance local and state climate goals. CC Power members represent approximately 12% of the CAISO’s load across 2.7 million customers and 112 municipalities spanning from Humboldt County to Santa Barbara County in California. For more information, please visit www.CACommunityPower.org.
About REV Renewables
REV Renewables, an LS Power company, is an industry leader in the development, acquisition, and operation of renewable energy and energy storage projects. With a 2.9 GW operating fleet and a substantial development pipeline, REV ranks among the nation’s largest non-utility portfolios of renewables and energy storage. REV is dedicated to meeting America’s growing demand for electricity with resources that are reliable, affordable, and resilient. For more information, please visit www.REVrenewables.com.
About LS Power:
Founded in 1990, LS Power is the premier development, investment, and operating company focused on the North American power and energy infrastructure sector, with leading platforms across generation, transmission, and energy solutions. Since inception, LS Power has developed or acquired 47,000 MW of power generation, including utility-scale solar, wind, hydro, battery energy storage, and natural gas-fired facilities. Additionally, LS Power Grid has built 780+ miles of high-voltage transmission, with 350+ miles and multiple grid infrastructure projects currently under construction or development. LS Power actively invests in and scales businesses that are accelerating the energy transition, including electric vehicle charging, demand response, microgrids, renewable fuels and waste-to-energy platforms. Over the years, LS Power has raised more than $60 million in debt and equity capital to support North American infrastructure. For more information, please visit www.LSPower.com.
REV Media Contact:
Stephanie Martin
Public Affairs Manager
Smartin@revrenewables.com