Sage Geosystems Pressure Geothermal and Storage

Sage Geosystems develops geothermal power generation and long-duration energy storage, with an office at 515 W Greens Road, Houston, Texas. The company aims to deliver competitive baseload power from hot dry rock with a small footprint.

Its enhanced geothermal approach injects water into an engineered reservoir in hot rock and uses both subsurface heat and stored pressure energy. Surplus electricity can be stored underground as pressure energy and recovered on demand, giving 8 hours to multi-day storage. Projects include a 3 MW storage facility with San Miguel Electric Cooperative and feasibility studies for US defence sites.

• Pressure geothermal: engineered reservoir uses heat and stored pressure energy.
• Long-duration storage: 8+ hours to multi-day discharge.
• Hot dry rock access: targets resources without natural hydrothermal reservoirs.
• Commercial projects: next EGS facility selected at Ormat's Blue Mountain plant (Sep 2026).
• Surface-equipment study: Chiyoda is assessing high-pressure surface facilities.

Technology transfer or joint studies with ASEAN geothermal developers in Indonesia and the Philippines. Firm renewable supply plus storage for industrial parks. Feasibility studies for utilities assessing hot rock resources in Vietnam.

Baseload geothermal power that does not depend on weather.

Built-in storage of 8 hours up to multiple days from the same wells.

Small surface footprint compared with many generation options.

Partnerships with Ormat and Chiyoda point to industrial-scale delivery.

Next-generation geothermal is attracting investment as grids look for firm clean power beyond solar and wind. Indonesia and the Philippines hold large geothermal resources, and Japanese engineering firms are partnering with technology developers to enter Asia-Pacific. Vietnam has limited conventional geothermal, so engineered systems are of interest.

Houston, Texas based. Partners and investors listed on the site include Ormat, Nabors, Meta, Carbon Direct Capital, ABB and the US Department of Defense. Chiyoda MoU announced 26 Aug 2026. Founding year not stated on the site.