HOUSTON, TX. – September 30, 2025 – XGS Energy, a developer of next-generation geothermal power projects leveraging a proprietary water-independent technology system, today announced the successful operation of its geothermal system at commercial scale for over 3000 hours, proving commercial economics. XGS is the first company to demonstrate a water-independent geothermal system at commercial conditions and scale. Operations were completed at the Coso geothermal field owned by Atlantica Sustainable Infrastructure and operated by Coso Operating Company, located in the Western Mojave Desert region of California.
XGS designed and executed a workover program on a well that had been idle in the Coso geothermal field for over two decades. After installing XGS’s proprietary geothermal system, including performance-boosting Thermal Reach Enhancement (TRE) technology, flow testing demonstrated record performance for a water-independent geothermal system, proving commercial economics by sustaining a difference between injection and production temperatures greater than 158˚F (70˚C). Power output from geothermal wells is directly tied to the temperature delta between injection and production fluid.
The extensive operating history was used to verify XGS’s production models, with actual performance falling within 2% of predicted values. XGS’s sealed closed-loop system, boosted by TRE, provides unprecedented predictability and active control of field performance versus other geothermal systems, which are subject to complex and continuously changing subsurface reservoir conditions. “Predictable and sustainable long-term performance has been a thorn in the side of the geothermal industry,” said XGS Chief Technology Officer Dr. Axel-Pierre Bois. “XGS’s ability to deliver a highly predictable geothermal system in any subsurface environment, paired with validated power production models, significantly derisks our project development and financing.”
The project further confirmed TRE formulation and placement methods at commercial temperature and depth conditions. Placement of TRE in the well was completed in less than 24 hours. “This project demonstrates we are not only able to leverage TRE to produce geothermal energy at commercial scale, but also that we can substantially shorten well construction times to deliver large-scale power projects faster,” said Dr. Ghazal Izadi, XGS Chief Operating Officer. “With strong demonstrated performance of the TRE system, we can turn our focus to more traditional value drivers such as well design, drilling speed and surface plant cost, leveraging best practices from the oil and gas industry to deliver cost advantage at scale.”
“This milestone is a testament to the extraordinary dedication and talent of the XGS team and our partners,”said Josh Prueher, Chief Executive Officer at XGS. “This success is a critical enabler of our three-gigawatt near-term commercial pipeline as we demonstrate the geographic flexibility and differentiated financeability of XGS’s unique technology.”
XGS is rapidly advancing a multi-gigawatt and growing project pipeline, underpinned by soaring electricity load growth and demand for new baseload energy supplies. In June, XGS announced a partnership with Meta to deliver 150 MW of geothermal energy to the PNM utility grid to support Meta’s data center operations in New Mexico.
To learn more about XGS Energy, please visit https://www.xgsenergy.com.
About XGS Energy
XGS Energy provides Clean, Round-the-Clock Energy Everywhere, Forever. XGS’s proprietary solid-state geothermal system uses thermally conductive materials to deliver affordable energy anywhere there is hot rock. The XGS system decouples geothermal energy production from its historical dependence on natural water resources and geological conditions, unlocking low-risk power project development, geographic flexibility, easier permitting, and faster deployment. XGS’s scalable, financeable geothermal energy approach is supported by leading investors globally including Anzu Partners, Aligned Climate Capital, BlueScopeX, B Current Impact Investment, ClearSky, ClimateIC, Constellation Technology Ventures, H&P, MIH Capital, Thin Line Capital, Valo Ventures, VoLo Earth Ventures, and WovenEarth Ventures. Learn more and explore our open roles at https://www.xgsenergy.com.
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Liz Benavides for XGS Energy
