Clearway Energy and Wärtsilä to add battery storage to five US solar projects

By Cameron Murray
July 12, 2022
Facebook
Twitter
LinkedIn
Reddit
Email
The BESS will be installed at solar plants in California and Hawaii. Image: Clearway Energy Group.

Solar developer Clearway Energy will deploy 500MW/2,000MWh of battery energy storage systems (BESS) from technology company Wärtsilä at five PV plants in the US.

The contracts cover three sites in California and two in Hawaii, all being operated or developed by Clearway.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

In California, Wärtsilä has started construction on BESS units totalling 275MW/1.1GWh to adjoin the Daggett 2 and Daggett 3 projects, which have 482MWac of PV and are adjacent to the site of a retired coal and natural gas plant.

The third California project is the already-operational 192MWac Rosamond Central solar farm, which will be connected to a 147MW/588MWh BESS from Wärtsilä.

In Hawaii, Wärtsilä is set to finalise construction this year on two projects totalling 75MW/300MWh of energy storage to be installed at Clearway’s Mililani I Solar and Waiawa Solar Power projects, which total 75MWac of PV.

For more on this story, visit sister site Energy-Storage.news.

Read Next

April 24, 2026
The European Commission (EC) has launched a new strategy to address the fossil fuel energy crisis in the Middle East and accelerate the “shift to homegrown, clean energies”, said EC president Ursula von der Leyen.
April 23, 2026
Renalfa IPP has secured funding from the European Bank for Reconstruction and Development (EBRD) for its Szihalom 450MW solar-plus-storage project in Hungary.
April 23, 2026
New York state has granted final siting permits to the AES Corporation’s 125MW Sugar Maple solar-plus-storage project.
April 22, 2026
Independent power producer Lydian Energy has acquired a 1.5GW solar PV and battery energy storage system (BESS) portfolio in North America.
April 22, 2026
Work has begun on the 500MW Maun solar-plus-storage project in Botswana, which will be a cornerstone of the country's plan to reach 1.5GW of operational renewable energy capacity by the end of the decade.
April 21, 2026
A group of non-profit organisations is petitioning California’s high court to review a recent decision that upheld the California Public Utilities Commission (CPUC) net energy metering 3.0 (NEM 3) policy for rooftop solar installations.

Upcoming Events

Upcoming Webinars
May 27, 2026
9am BST / 10am CEST
Media Partners, Solar Media Events
June 3, 2026
National Exhibition and Convention Center (Shanghai)
Solar Media Events
June 16, 2026
Napa, USA
Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain