Hydrostor

Hydrostor is a long-duration energy storage company headquartered in Toronto, Canada, with additional offices across the United States and Australia. It develops storage facilities for utilities and grid operators that need multi-hour, dispatchable capacity to firm up wind and solar generation.

Its Advanced Compressed Air Energy Storage (A-CAES) technology compresses air using off-peak or renewable electricity and stores it in engineered underground caverns together with the heat generated during compression; on discharge, the air is reheated and expanded through a turbine to generate electricity. Facilities are typically sized around 200 to 500 MW with 8 or more hours of storage, and the company operates one commercial facility in Canada with a pipeline of more than 15 additional projects.

1. Underground storage: Uses engineered caverns instead of scarce natural geology like salt domes.

2. Long duration: Delivers 8 or more hours of dispatchable output per facility.

3. Utility scale: Typical projects range from 200 to 500 MW.

4. Heat recovery: Captures and reuses compression heat to raise round-trip efficiency.

5. Commercial operation: Runs one operating facility in Canada today.

6. Growing pipeline: More than 15 additional projects in development across multiple countries.