Endurance Energy says its prototype marine geothermal power system generated more electricity than it consumed during a recent deployment 300 miles off the Oregon coast — though the milestone lasted just 8.7 seconds.
The Seattle-based startup landed its 3-ton power plant on the seafloor near a natural vent releasing water at about 538 degrees Fahrenheit. The team operated the system remotely through a fiber-optic network running along the seabed.
The expedition marked Endurance’s fifth deployment to the ocean floor where it tested Adélie — a 100-kilowatt geothermal generator named for a penguin.
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