Our Projects

Broken Hill A-CAES Project

The Broken Hill A-CAES Project is a full scale Advanced Compressed Air Energy Storage (A-CAES) facility that is under active development in New South Wales (NSW), Australia. The proposed facility will provide 200 MW of capacity, and eliminate the need for major investments in expensive transmission lines and ongoing reliance on highly polluting diesel generators.

Rosamond A-CAES Project

The Rosamond A-CAES Project is a full scale Advanced Compressed Air Energy Storage (A-CAES) facility that is under active development in the United States. The proposed facility will provide 500 MW of capacity, turning California’s growing solar and wind resources into on-demand peaking capacity while allowing for the closure of emitting fossil fuel generating stations and maximizing transmission system utilization.

Goderich A-CAES Facility

The Goderich A-CAES Facility, located in Goderich, Ontario, Canada, is the world’s first commercially contracted Advanced-CAES facility. The plant is contracted by Ontario’s Independent Electricity System Operator (IESO) for peaking capacity, ancillary services, and full participation in the merchant energy market to support grid reliability.

Toronto A-CAES Facility

With the completion of the Toronto Island Demonstration Facility in 2015, Hydrostor developed the world’s first, grid connected adiabatic CAES facility with utility host Toronto Hydro.


6 GW Project Pipeline

Hydrostor has a significant project pipeline representing over 6 gigawatts (GW) and 65+ gigawatt hours (GWh) of large-scale utility and end-user applications that are well-positioned to be awarded high-value revenue contracts in the near-term. Hydrostor has focused on North America, South America, and Australia as initial target markets due to their demonstrable regulatory drivers, available contracting pathways, and fundamental market economics for long duration energy storage.

With the completion of Hydrostor’s operational and commercially contracted Goderich Facility in 2019, the company has been focused on developing A-CAES projects that exceed 200 MW and 6 or more hours of duration. With a proven delivery pathway and operational performance guarantees, Hydrostor’s pipeline is focused on large-scale applications of flexibly sited, greenfield A-CAES that will enable the energy transition to non-emitting resources by:

  • Directly replacing coal & natural gas plants (as peaking capacity alternatives);
  • Provide alternative to expensive and difficult to permit transmission upgrades (as non-wires alternatives), and;
  • Pairing with variable renewable energy (VRE) such as wind and solar PV to provide baseload and dispatchable clean energy directly to high value customers including mines, large industrials, and data centers.

Hydrostor also expects further long-term growth in regions that demonstrate a growing need for long-duration energy storage capacity. This includes further expansion within existing markets, and new entry into select markets in Europe and Asia, that have significant needs for new electrical capacity and significant drivers for growth in clean energy. 

Hydrostor already has over 1,000 MW of A-CAES projects with significant commercial off-take interest on the west coast (USA), as well as advanced engineering and development underway, in addition to a large-scale near-term opportunity with a major Canadian utility, and the 200 MW Broken Hill A-CAES Project which was recently selected as a preferred non-wires alternative by TransGrid, Australia’s largest utility. 

With  regular additions, the total pipeline currently includes 14 projects, many of which are expected to enter advanced development stages within the next year.