ERCOT’s first geothermal electrons are coming to the grid

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Startup Sage Geosystems is capitalizing on Texas' efficient permitting process to introduce a groundbreaking geothermal energy storage project in collaboration with the San Miguel Electric Cooperative. The innovative "EarthStore" facility, slated for a launch later this year, aims to store up to three megawatts of surplus renewable energy using pressurized water deep underground. By purchasing and selling electricity on the ERCOT market, Sage will manage the system to achieve roundtrip efficiencies between 70% and 75%, paving the way for cost-effective electricity generation.

Following successful pilot tests demonstrating cost competitiveness with other energy storage solutions, the Christine, Texas venture represents Sage's maiden commercial energy storage endeavor, made possible through a $17 million Series A funding round. Texas' speedy permitting procedures, requiring only two to three weeks for approval, make it an ideal location for such projects. Sage Geosystems' CEO Cindy Taff sees this initiative not only as a step forward in advancing geothermal technology but also in meeting the long-duration energy storage requirements arising from the current surge in data center infrastructure demand.