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

By Cameron Murray
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

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

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

May 13, 2025
Iberdrola Australia has started installing the first of its solar PV modules at the 377MW Broadsound solar-plus-storage project in Queensland.
May 12, 2025
The African Development Bank (AfDB) has approved financing for a 62MW PV plant in Togo, while Zambia began construction on a 100MW solar-plus-storage project.
May 9, 2025
Talk of manufacturing consolidation, excitement over energy storage and other key takeaways from Intersolar Europe 2025.
May 8, 2025
The attachment rate of energy storage with a solar array has reached 69% in the first quarter of 2025 for US residential installer Sunrun, while the company expects the tariff outlook to be manageable.
May 7, 2025
The Scarlet II Solar Energy Park currently features 200MW of solar capacity paired with a 40MW/160MWh BESS.
May 7, 2025
Israel-headquartered inverter producer SolarEdge has shipped 1.2GW of PV inverters in the first quarter of 2025.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
May 21, 2025
London, UK
Solar Media Events
June 17, 2025
Napa, USA
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 8, 2025
Asia