Hydrostor is developing truly massive grid storage in watery caverns

Read the full story at Canary Media.

Dozens of companies are building breakthrough technologies to store clean power for hours on end. Canadian startup Hydrostor could beat them to market with a combination of water and caves.

After operating its technology in Ontario’s wholesale market for two years, Hydrostor last week won a government grant worth 4 million Canadian dollars ($3.2 million) to pay for design work for a project that could deliver as much as 500 megawatts. That’s more capacity than the largest lithium-ion battery plants that are now operating. But Hydrostor’s facility would be able to discharge for up to 12 hours, longer than is typically cost-effective for batteries.

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