Endurance Energy's Underwater Volcano Power Plan

Energy Technology Environment

Oct 1, 2026 · 4 min read

Endurance Energy's Underwater Volcano Power Plan

Endurance Energy, a startup aiming for a new frontier in energy, has just secured $63 million to develop power plants from underwater volcanoes. The firm seeks to harness the ocean depths' intense temperatures to generate 24/7 clean energy.

In the depths of the ocean, where extreme temperatures and pressures exist, a startup called Endurance Energy is engineering power plants that harness geothermal energy from underwater volcanoes. The startup just raised $63 million, a major milestone, to turn this geothermal energy into a 24-7 clean electricity source.

The ocean depth as a power source

Endurance Energy is building power plants beneath the ocean floor, using the extreme heat of underwater volcanoes to generate 24-7 electricity. They drill into tectonic boundaries and capture superheated water over 700 degrees Fahrenheit. The ocean floor acts as a naturally heated boiler, boiling a refrigerant to spin a massive turbine and generate electricity. This clean energy source is a promising solution for powering AI data centers and other industries that need massive amounts of 24-7 power.

The grand design of Endurance Energy

AI data centers need massive amounts of 24-7 power. This is why Endurance Energy is tapping into extreme environments. Endurance Energy is moving beyond the constraints of traditional geothermal power, and focusing on subsea energy. The company is deploying massive modular power plants right off the shores of major coastal cities, and use rapid iteration hardware to create reliable, clean energy.

What does the process look like?

Endurance has a three-step process that uses Earth's natural geothermal forces. The most extreme areas of the Earth hold the key to a better future. Their system taps into naturally hot geological systems.

How the power of the ocean operates

The Endurance Energy power plants use the heat energy generated by volcanic activity beneath the ocean floors to generate electricity. The process is similar to land-based geothermal plants, but with a key difference: the plants use the superheated water from the ocean floor to boil a refrigerant, which then spins a massive turbine to generate electricity. The surrounding ocean acts as a natural cooling system, allowing the cycle to repeat.

The expertise behind the innovation

Engineers from SpaceX form the core of the development team. They have recast themselves to face the challenges of a hostile environment. The company is developing rapid iteration hardware to create a power plant that can operate in the extreme conditions of the deep sea. It has operated prototypes to depths of around 3,300 meters and encountered hydrothermal temperatures as high as 386°C.

The high stakes of underwater power

The company has big plans, betting on the most hostile environments on Earth, exploring potentially gigawatt-scale generation. The gigawatt vision is designed to generate 100 kW of electricity at Axial Seamount, and the ultimate goal is to place always-on clean energy right off the shores of major coastal cities. That said, the intense pressure and the corrosive environment of the deep sea present significant challenges to the durability and long-term maintenance of these power plants.

Building a power plant under the ocean

If you want to explore the engineering behind Endurance Energy, the following will help you get a clear vision of their innovative technology.

  • Founder Andrew Redd and his team, former engineers, are using water heated by the earth, which boils a refrigerant, which powers a turbine.
  • The underground's power can be produced anywhere there is volcanic activity. They plan to deploy off the Oregon Coast.
  • The project is in the prototype stage. An initial 100 kW prototype is planned.
  • The company has a 54 million dollar round of funding. It's early in the phase of development.
  • Relying on natural coolant systems. The ocean is used to cool the system.
  • Endurance Energy has a clear vision of the future. Diverse gigawatt-scale and AI-powered solutions are on their roadmap.

The future of the underwater power plants

The future of underwater power plants could revolutionize the energy industry. If Endurance Energy can overcome the challenges of extreme pressure, corrosion, and maintenance, the ocean floor could become a vast new source of clean, always-on electricity. The technology could power industries and AI data centers, providing a reliable and sustainable source of energy. But for now, the question remains: Can you make a power plant work economically several kilometers beneath the ocean?

Questions readers ask

How does Endurance Energy's technology differ from traditional geothermal power plants?

Endurance Energy's technology is unique because it harnesses geothermal energy from underwater volcanoes, whereas traditional geothermal plants are land-based. The startup captures superheated water from the ocean floor, which boils a refrigerant to spin a turbine, generating clean electricity. The ocean itself acts as a natural cooling system, allowing the process to be continuous.

What kind of power output are we talking about, and how does it compare to other energy sources?

Endurance Energy's goal is to generate gigawatt-scale power, which is equivalent to 1 billion watts. For reference, a typical coal power plant generates about 500-700 megawatts. The startup aims to place always-on clean energy right off the shores of major coastal cities, targeting industries like AI data centers that need massive amounts of 24-7 power.

What are the biggest technical challenges Endurance Energy faces in building underwater power plants?

The primary challenges are the extreme pressures and corrosive environment of the deep sea. These conditions present significant hurdles for the durability and long-term maintenance of the power plants. The company is developing rapid iteration hardware to create a power plant that can operate in these harsh conditions.

Who is leading the engineering efforts at Endurance Energy, and what experience do they bring?

The core of the development team at Endurance Energy consists of engineers from SpaceX. They bring extensive experience in handling extreme environments, which is crucial for developing technology that can operate in the depths of the ocean.

How does the power generation process at Endurance Energy work step by step?

Endurance Energy's process involves drilling into tectonic boundaries to capture superheated water over 700 degrees Fahrenheit. This water boils a refrigerant, which spins a massive turbine to generate electricity. The surrounding ocean acts as a natural cooling system, allowing the cycle to repeat. The company is deploying massive modular power plants right off the shores of major coastal cities.

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