Approval is being sought for a 400 MW advanced compressed air energy storage (A-CAES) project with eight hours of storage to be built in California by technology provider Hydrostor.
The Canada-headquartered company is the first in the world to have built an operating commercial A-CAES facility, a much smaller 1.75 MW project in Goderich, Ontario, with about 10 MWh capacity based on its own technologies.
Hydrostor has now filed an Application for Certification with the California Energy Commission for the 400 MW / 3,200 MWh Pecho Energy Storage Center it wants to build in the state’s San Luis Obispo County. Application for Certification (AFC) is the standard licensing process for power plants 50 MW or greater that fall within the commission’s jurisdiction.
The long-duration project would be bigger than even the GWh-scale lithium-ion battery storage systems that are being built in California, at double the size of the 1,600 MWh Moss Landing Energy Storage Facility that was completed earlier this year. California lithium-ion battery plants also have an upper limit of four hours’ duration for which they can be economical to build while capturing market opportunities.