With $54M and a SpaceX playbook, Seattle’s Endurance races to tap deep-sea volcanic power

A geothermal energy demo device built by Seattle startup Endurance being tested in the Mariana Islands. (Endurance photo via LinkedIn) Endurance Energy , a Seattle-based startup developing technology to extract energy from the heat beneath the ocean floor, has raised $54 million. The team — led by former SpaceX engineer Andrew Redd — is racing to meet surging demand for clean power, with plans to deliver electricity to the grid within two years.