Meet an Unreasonable Venture

Hydrostor

Providing grid-scale electricity storage by storing renewable energy as compressed air.

Curtis VanWalleghem

Co-Founder, CEO & Board Member at Hydrostor

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hydrostor.ca

Employees 101–200

Headquarters Toronto, Ontario, Canada

Hydrostor is a leader in Advanced Compressed Air Energy Storage (A-CAES), a technology uniquely suited to enable the transition to a cleaner, more reliable electricity grid. A-CAES helps address electricity system needs for dispatchable capacity, renewable integration and optimization, transmission deferral and ancillary services, and is ideal for use in behind-the-meter or remote applications for mines and large industrial operations. Hydrostor's solution delivers low-cost, long-duration, bulk energy storage that is synchronous and emission-free, and can be flexibly located, including as replacements for retired fossil fuel plants. The proprietary technology is now the leading low-cost bulk energy storage solution -- at half the cost of lithium ion batteries and 10 times the lifespan. Hydrostor is backed by sustainable infrastructure developer/funder Meridiam and equipment supplier BakerHughesGE.

Energy & Environment

Currently Operating in Four Regions

Elevator Pitch Powering the Grid by Storing Renewable Energy Underground

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Press Mentions

June 26, 2025

Hydrostor Brings on Former Shell Executive, Glenn Wright, as New Member of Board of Directors

Hydrostor has appointed former Shell executive Glenn Wright to its board of directors, enhancing its leadership team. This strategic move positions Hydrostor to leverage Wright's extensive...

Read on The Daily News »

February 17, 2025

Hydrostor Secures $200 Million In Funding From Canada Growth Fund, Goldman Sachs, And CPP - The Union Journal

Hydrostor has successfully secured $200 million in funding from prominent investors, including the Canada Growth Fund and Goldman Sachs. This investment will significantly enhance its advanced...

Read on The Union Journal »

February 12, 2025

Power move: Toronto’s Hydrostor gears up to start construction on its inaugural energy storage facilities

Hydrostor is set to begin construction on its first energy storage facility in Toronto, marking a significant milestone for the company. This project highlights Hydrostor's commitment to innovative...

Read on Toronto Star »

January 17, 2025

Rosamond energy site gets loan from feds

Hydrostor has secured a significant federal loan to advance its energy storage project in Rosamond, California. This funding will enhance the company's innovative compressed air energy storage...

Read on Antelope Valley Press »

January 9, 2025

Hydrostor's Willow Rock Energy Storage Project Gets Green Light For $1.76 Billion Loan Guarantee From U.S. DOE

Hydrostor's Willow Rock Energy Storage Project has received a conditional commitment for a $1.76 billion loan guarantee from the U.S. Department of Energy. This significant backing highlights...

Read on SolarQuarter »

July 4, 2024

From EVs to Energy: Experts Explore Cleantech Investment Opportunities at Collision

At Collision, experts discussed the growing investment opportunities in clean technology, focusing on electric vehicles and renewable energy. The event highlighted the potential for financial...

Read on Aimyourdeals - Investment and Stock News »