United States: Eolus sells a 100 MW/400 MWh energy storage project in California

Eolus completes the sale of its battery energy storage project in Poway, California. With a capacity of 100 MW/400 MWh and an estimated value of USD 230 million, this transaction highlights the growth of the U.S. energy market.

Share:

Comprehensive energy news coverage, updated nonstop

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access • Archives included • Professional invoice

OTHER ACCESS OPTIONS

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

FREE ACCOUNT

3 articles offered per month

FREE

*Prices are excluding VAT, which may vary depending on your location or professional status

Since 2021: 35,000 articles • 150+ analyses per week

Eolus, a developer of renewable energy projects, has signed an agreement to sell its Pome battery energy storage project located in Poway, California. The project, with a planned capacity of 100 MW/400 MWh, is under construction and is scheduled for commercial operation in the first half of 2025. The total value of the transaction is estimated between USD 230 million and USD 235.5 million.

A key project for the Californian energy market

The Pome project is supported by a ten-year tolling agreement with a Californian load-serving entity. This agreement will allow electricity to be stored and redistributed when needed, offering critical flexibility to stabilize the grid in a state heavily reliant on intermittent renewable energy sources.

Aligned with California’s ambitious energy goals, the project reflects the growing demand for storage solutions to support the transition to a low-carbon economy. The battery is currently being installed on-site, with the transaction expected to close in the first quarter of 2025, pending specific conditions.

An expanding sector in the United States

Since 2015, Eolus has been investing in renewable energy and storage projects across the U.S. The Pome project represents its fourth major sale in the country, emphasizing the attractiveness of the market and the rise of large-scale energy storage technologies.

According to industry analysts, California, with its ambitious carbon neutrality goals, remains one of the primary markets for energy storage solutions. Recent investments in infrastructures like Pome demonstrate the private sector’s interest in this strategic area.

Outlook for energy storage

The development of the Pome project is part of a global trend toward independent storage solutions. These infrastructures address the intermittency of renewable energy while meeting the flexibility needs of power grids.

The planned 400 MWh capacity for this project could serve as a model for other U.S. states facing similar challenges. The success of this transaction underscores the importance of partnerships between private investors and public entities in expanding energy infrastructure across the United States.

Blue Current secures over $80mn in funding led by Amazon to industrialise its silicon solid-state batteries for large-scale mobility and stationary applications.
AGL has begun construction of a 500 MW battery storage system in Tomago, a project valued at AUD800mn ($530.8mn), in the Hunter region, with commissioning expected in 2027.
Real estate group JALCO Holdings diversifies its activities by investing in a 2 MW/8.1 MWh battery energy storage system developed by Taoke Energy in Narita, Chiba Prefecture.
BKW is conducting feasibility studies on four sites to assess the profitability and development conditions for large-scale battery storage installations in Switzerland.
A 300 MW/1,200 MWh electrochemical energy storage facility has been commissioned in China, marking a major milestone in the country’s largest publicly funded energy infrastructure project.
Sustainable Holdings is developing a battery storage facility in Matsusaka, with operations scheduled to begin in June 2026 on Japan’s electricity market.
California-based Korbel Winery is now equipped with an integrated energy storage and intelligent control system, installed by Energy Toolbase and BPi, to optimise usage and address local grid constraints.
The 200 MW Greenwater battery storage project enters execution phase following a $400mn bank financing, marking a strategic milestone in the Pacific Northwest’s energy infrastructure development.
Solar with batteries becomes a bankability lever in three key ASEAN markets, where the focus shifts from cost reduction to the monetisation of energy flexibility.
Energy group RWE launches construction of its largest UK storage system, with 700 MWh capacity, at its Pembroke power station in Wales.
The Australian government opens Tender 8 to secure 16 GWh of storage, for the first time including aggregated portfolios of 5 to 30 MW within the National Electricity Market.
With a strategic investment in a 200 MWh facility, European Energy strengthens its industrial position in Denmark and energises the Nordic battery storage market.
The Spanish renewable energy producer significantly increased its investments and revenue while achieving more than half of its asset rotation target for the 2025–2027 period.
Chinese manufacturer EVE Energy has signed a three-year memorandum of understanding with Sweden’s Vimab BESS AB to supply batteries and energy storage solutions in Northern Europe.
Huawei's full-lifecycle battery safety rating system has been officially validated by a national technical committee, marking a key milestone for large-scale energy storage deployment.
AMPYR Australia and InCommodities have signed a 15-year partnership for the Bulabul BESS project, marking the Danish trader’s first long-term commitment in the Australian energy storage market.
Tokyo Gas and Okaya & Co. will begin construction in December 2025 of a 25 MW/75 MWh battery energy storage system in Hokkaido, with commercial operations expected in 2028 or later.
US-based CETY has been awarded a $10mn contract to build a battery energy storage system in New York State, marking the first in a series of planned installations across the region.
French energy group Engie wins its second-largest global battery storage project with a capacity of 280 MW, awarded by a state-owned company in Gujarat, India.
Nostromo’s IceBrick system becomes the first behind-the-meter thermal storage device to participate in California’s wholesale energy market, in partnership with Olivine, marking a milestone for commercial buildings.

All the latest energy news, all the time

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access - Archives included - Pro invoice

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

*Prices shown are exclusive of VAT, which may vary according to your location or professional status.

Since 2021: 30,000 articles - +150 analyses/week.