Endurance Energy has conducted a demonstration of the first subsea geothermal power plant near the Axial Seamount, an underwater volcano in the northeast Pacific Ocean. The test lasted three weeks and produced less than 10 seconds of net-positive electricity, indicating the potential for subsea geothermal energy. The company aims to commercialize this technology for Pacific island nations and others seeking alternatives to fossil fuels. CEO Andrew Redd highlighted the benefits of using cold seawater for cooling and the pressure provided by the ocean.
Key facts
- The test took place at the Axial Seamount in September 2026.
- The prototype power plant weighed 3 tons.
- The demonstration generated less than 10 seconds of net-positive electricity.
- Endurance Energy is based in Seattle.
- The project aims to provide renewable energy alternatives for Pacific island nations.
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