The Energy Storage Report 2024

Now available to download, covering deployments, technology, policy and finance in the energy storage market

BLM approves Clearway’s 150MW BESS at California wind project


The US Bureau of Land Management (BLM) has given the go-ahead for a large-scale battery energy storage system (BESS) co-located with a wind plant in California.

BLM has approved the Alta Wind Battery Energy Storage System project, which will be located within the existing right-of-way land of the Alta 1 Wind Facility project in Kern County, California.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

The BESS is being developed by independent power producer (IPP) Clearway Energy, as per the BLM National NEPA Register. The Register said it would generate 150MW of power and “store up to 1,200MW” of electricity.

In response to a query from, the BLM said that the latter figure referred to MWh/megwatt-hours, meaning the BESS will be a 1,200MWh system.

The BESS will utilise lithium-ion batteries and occupy 20 acres of land, with 23 used in total for the balance of plant (BOP) components. An expected commercial operation date (COD) has not been revealed.

Although unconfirmed by the BLM and Clearway, Alta 1 Wind appears to be part of the larger Alta Wind project that Clearway acquired from developer Terra-Gen a decade ago. It was then said to be 947MW in power, although recent announcements indicate it could be larger.

The BESS would smooth out the wind plant’s generation by discharging to the grid when the plant’s production tails off.

California has the most BESS deployments in the US, driven by its high solar PV deployments and long-term power purchase agreements (PPAs) between utilities and project owners (through grid operator CAISO’s Resource Adequacy framework), enabling financing for large-scale projects.

Clearway is set to commission a separate BESS project totalling 147MW/588MWh also in Kern County this year and is also highly active in Hawaii, where it has multiple large-scale solar-plus-storage projects online.

This article was updated after publication following clarification of the 1,200MWh figure by the BLM.’ publisher Solar Media will host the 5th Energy Storage Summit USA, 19-20 March 2024, in Austin, Texas. Featuring a packed programme of panels, presentations and fireside chats from industry leaders focusing on accelerating the market for energy storage across the country. For more information, go to the website.

Read Next

April 18, 2024
The CFO of Goldman Sachs-backed US battery storage developer-operator GridStor discussed its recent investment tax credit (ITC) transfer deal for a California BESS project, highlighting some downsides as well as positives from the new mechanism.
April 18, 2024
Clearway Energy has put two large solar and storage projects into operation in California, it announced on the same day as an industry letter asking Congress to reform siting, permitting and transmission before this year’s elections.
April 17, 2024
Renewable energy developer-operator Arevon has entered into a long-term offtake agreement for a 250MW/1,000MWh battery energy storage system (BESS) in California with community choice aggregator (CCA) MCE.
April 11, 2024
Virtual power plants (VPPs) in California using technologies including home batteries and demand response (DR) could provide 7.5GW of capacity in ten years’ time, 15% of peak demand, analysis from consultancy the Brattle Group shows.
April 11, 2024
Irish utility and IPP ESB has received planning consent for a project combining wind and battery energy storage system (BESS) technology in Scotland, UK.

Most Popular

Email Newsletter