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

March 24, 2026
NTPC Green Energy has issued a tender for a 100MW solar PV project paired with a 50MW/200MWh battery energy storage system in Jhansi, Uttar Pradesh.
March 24, 2026
Polish solar developer and investment platform ELQ plans to invest up to €2.5 billion to build solar PV and energy storage projects in Ukraine.
March 24, 2026
The RES Group has finalised an 'asset management mandate' with Nala Renewables for a 217MW solar-plus-storage portfolio.
March 19, 2026
South African independent power producer (IPP) Anthem has begun construction on a 475MW solar PV project, the “largest” single-phase solar site in South Africa.
March 19, 2026
The California Senate Energy, Utilities and Communications Committee has unanimously voted 14-0 (and 3 abstentions) in favour of a bill for balcony solar.
March 19, 2026
PV manufacturer Canadian Solar’s first US-made solar cells are expected to be produced by the end of March in Jeffersonville, Indiana.

Upcoming Events

Solar Media Events
April 15, 2026
Milan, Italy
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
Solar Media Events
November 24, 2026
Warsaw, Poland