Startup Endurance Energy pulls power from an underwater volcano off Oregon

Seattle-based Endurance Energy tested the first subsea geothermal plant, Adélie, at Axial Seamount about 500 km off Oregon. The unit produced 8.7 seconds of net-positive power, averaging roughly 2 kW and peaking at 16.5 kW. The company aims for first commercial power in Tonga in 2027.

• Adélie generated 8.7 seconds of net-positive power, averaging 2 kW and peaking at 16.5 kW
• A 16-meter well flowed at 260 °C
• A software fault and a failed power cable ended the test
• First commercial project is planned in Tonga with power targeted for 2027