Sage Geosystems signs land use agreement for energy storage facility in Texas

Sage Geosystems entered into a land use agreement with San Miguel Electric Cooperative (SMECI) for the 3MW Geopressured Geothermal System (GGS) energy storage facility.

The EarthStore facility, located in Christine, Texas, will be the world’s first project to utilize the earth’s natural capacity for energy storage to produce clean electricity on demand. This technology offers a reliable power source that is independent of weather conditions and not reliant on wind or sunshine.

The 3MW EarthStore system will be located near the SMECI lignite coal power plant in Christine, Texas. Sage will act as a merchant, buying and selling electricity to the ERCOT grid.

“Once operational, our EarthStore facility in Christine will be the first geothermal energy storage system to store potential energy deep in the earth and supply electrons to a power grid,” Cindy Taff, CEO of Sage Geosystems, said. “Geothermal energy storage is a viable solution for long-duration storage and an alternative for short-duration lithium-ion batteries. Electric utilities and co-ops like SMECI, will be able to use our technology to complement wind and solar, and stabilize the grid.”

The facility will use Sage’s proprietary technology to store energy, targeting 6-to-10-hour storage durations. In addition, water losses are targeted to be less than 2 percent.

At scale, this energy storage system will be paired with renewable energy to provide dispatchable power to the electric grid. When combined with solar power, Sage’s EarthStore facility enables 24/7 electricity generation at a blended Levelized Cost of Energy (LCOE) well under $0.10/kWh.

“Long-duration energy storage is crucial for the ERCOT utility grid, especially with the increasing integration of intermittent wind and solar power generation. We are excited to be part of this innovative project that showcases the potential of geothermal energy storage,” Craig Courter, CEO, San Miguel Electric Cooperative, said.

Sage Geosystems is headquartered in Houston.

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