Wärtsilä to Supply 500 MW ESS Solution for Clearway’s Solar-plus-Storage Project Portfolios

Wärtsilä has signed a contract to supply 500 MWac / 2 GWh portfolio of energy storage systems (ESS) to clean energy projects developer Clearway Energy Group.
 
The contract covers five sites located in Hawaii and California and includes one of the world’s largest-ever solar-plus-storage project portfolios.
 
The combination of solar plus storage resources will provide essential grid reliability to balance an increasing mix of renewable generation.
 
Commenting on the development, Håkan Agnevall, President and CEO of Wärtsilä, said “The US is a bellwether for the global energy transition and projects like these demonstrate that decarbonisation is possible on a grand scale anywhere in the world. Energy storage as a flexible balancing power asset is an essential component for a 100 percent renewable energy future. We are very proud and grateful for being awarded these significant projects, which are major indicators of Wärtsilä’s position as a leading provider of global flexibility solutions for the clean energy transition. We focus on power system optimisation and the integration of different generating assets, providing our customers with the highest reliability at the lowest overall energy cost. Across the globe, we have been delivering energy storage systems at increasing scope and scale to help our customers meet their decarbonisation goals.”
 
“Wärtsilä shares our vision of a world powered by clean energy. We are excited to bring online a portfolio of solar and storage projects at this scale to ensure reliable and affordable clean energy for our customers,” said Craig Cornelius, CEO of Clearway Energy Group.
 
The portfolio includes the Daggett 2 and Daggett 3 projects, which together represent one of the largest co-located photovoltaic plus storage facilities in California, at 482 MWac of solar PV and 275 MWac / 1.1 GWh of energy storage. The construction of the two projects has already commenced and is expected to be completed in 2023.

Two projects, comprising 75 MWac / 300 MWh of energy storage, are being installed at Clearway Energy Group’s Mililani I Solar and Waiawa Solar Power facilities on the Island of Oahu in Hawaii. The construction for Mililani I Solar and Waiawa Solar Power projects are expected to finalise in 2022.

The fifth project in the portfolio is a 147 MWac / 588 MWh energy storage system that will be connected to the operating 192 MWac Rosamond Central solar PV facility in Kern County, California. The energy storage system will increase the effectiveness of the solar facility by performing ancillary services, primarily solar shifting, for the California Independent System Operator. The construction of the project is expected to be completed in December 2023.