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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.