Quaise Energy Secures $134 Million to Accelerate World’s First Superhot Geothermal Power Plant
Quaise Energy has taken another major step toward transforming the future of clean energy after announcing the initial close of its Series B funding round, raising $134 million to accelerate the commercialization of superhot geothermal technology. The investment marks one of the largest funding rounds in the emerging geothermal sector and positions the company to advance both its groundbreaking drilling technology and the development of the world’s first commercial superhot geothermal power plant.
The financing round was led by Prelude Ventures, with strategic investments from Japanese energy giants JERA and Idemitsu. Existing investors, including Safar Partners, also participated in the round, reaffirming confidence in Quaise Energy’s long-term vision. The company expects additional equity and project debt financing to close soon, bringing further financial strength as it moves toward commercial deployment.
With the completion of this first close, Quaise Energy has now raised a total of $230 million since its founding. The fresh capital will primarily support Project Obsidian, the company’s flagship geothermal power project located in Oregon, while also accelerating the commercialization of its proprietary millimeter wave drilling technology.
Funding to Advance Commercial Deployment
The newly secured capital represents more than a financial milestone. It marks the company’s transition from years of research, testing, and technology validation into the commercial execution phase.
Project Obsidian will become the world’s first commercial superhot geothermal power plant, demonstrating how deep geothermal resources can provide reliable, carbon-free electricity on a utility scale. The funding will also enable Quaise to continue refining and scaling its drilling technology to reach depths exceeding five kilometers, where temperatures are high enough to unlock vast geothermal energy resources.
Alongside corporate financing, Quaise is simultaneously raising project-level equity and debt financing as it prepares for future commercial operations. The company has also secured commercial power off-take agreements with customers, although the identities of those partners have not yet been publicly disclosed.
Unlocking Earth’s Deepest Heat
Unlike conventional geothermal systems that rely on naturally accessible underground reservoirs, Quaise aims to access heat found much deeper beneath Earth’s surface.
Its breakthrough approach is based on millimeter wave drilling, a technology originally developed through years of research at the Massachusetts Institute of Technology (MIT). Rather than relying solely on mechanical drill bits, the system uses powerful millimeter waves to vaporize and fracture extremely hard rock formations.
This non-contact drilling process enables the company to penetrate rock formations that are too hot and too deep for conventional drilling technologies.
By reaching depths where underground rock temperatures range between 300°C and 500°C, Quaise believes geothermal energy can become a globally available baseload power source capable of competing directly with fossil fuel and nuclear power generation while maintaining the low operating costs associated with renewable energy.
If successful, the technology could dramatically expand the geographic availability of geothermal resources, making reliable clean electricity possible in regions previously considered unsuitable for geothermal development.
Significant Progress in Field Testing
The company has already demonstrated substantial technical progress during field operations in Central Texas.
During 2025, Quaise successfully drilled more than 100 meters through granite, marking the first full-scale field demonstration of millimeter wave drilling penetrating basement rock under real operating conditions.
The achievement represented a significant validation of years of laboratory development and engineering work.
The company is now advancing toward drilling nearly one kilometer deep at the same Texas location.
Achieving that milestone would establish the deepest penetration ever accomplished using millimeter wave drilling technology and would also represent the deepest drilling record for any non-contact drilling method.
These successful demonstrations provide the technical foundation for deploying the technology at Project Obsidian and future geothermal developments worldwide.
According to company executives, every successful field milestone strengthens confidence that superhot geothermal energy can become commercially viable at utility scale.
CEO Highlights Commercial Transition
Carlos Araque, Chief Executive Officer and President of Quaise Energy, described the funding as a defining moment in the company’s evolution.
He emphasized that the latest investment enables Quaise to move beyond proving the science behind its technology and toward generating commercial revenue through operating geothermal power plants.
The company believes Earth’s deep geothermal heat represents one of the largest untapped clean energy resources available and has the potential to supply reliable electricity around the clock without depending on weather conditions.
Unlike solar and wind generation, geothermal power can provide continuous baseload electricity throughout the year, making it particularly valuable for supporting modern electric grids experiencing increasing renewable energy penetration.
Investors Express Confidence
Lead investor Prelude Ventures reaffirmed its long-standing support for Quaise Energy’s mission.
The investment firm noted that it backed the company from its earliest stages because it believed accessing superhot underground rock could fundamentally transform geothermal energy production worldwide.
Prelude Ventures stated that recent field achievements have validated the company’s original investment thesis and demonstrated meaningful progress toward commercial deployment.
The firm’s leadership believes Quaise is now positioned to move from proving the technology to delivering reliable clean electricity directly to the power grid.
Strategic Support from Japan’s Energy Leaders
The participation of JERA and Idemitsu adds considerable strategic value beyond financial investment.
Both companies rank among Japan’s largest energy organizations and bring extensive expertise in large-scale power generation, infrastructure development, and energy markets.
Idemitsu highlighted the transformative potential of millimeter wave drilling, noting that the technology could redefine geothermal energy by enabling access to temperatures and depths previously considered unreachable.
The company described the investment as consistent with its broader strategy of supporting next-generation energy technologies capable of delivering stable and sustainable electricity supplies.
Meanwhile, JERA emphasized that next-generation geothermal energy could become an important global baseload resource as electricity demand continues to rise worldwide.
Company representatives expressed enthusiasm about collaborating with Quaise to accelerate both technological development and future commercial deployment.
Project Obsidian Takes Shape
Construction activities are already underway at Project Obsidian, which is located on federal geothermal leases within Oregon’s Deschutes National Forest.
The location is widely regarded as one of the most extensively studied geothermal regions in the United States, making it an ideal site for demonstrating next-generation geothermal technologies.
Quaise believes the project possesses gigawatt-scale development potential, allowing future expansion well beyond its initial commercial phase.
The company expects the facility to begin delivering electricity to the grid by 2030.
Once operational, the project will contribute reliable clean electricity to the Pacific Northwest, a region experiencing growing electricity demand alongside transmission infrastructure constraints.
Because geothermal plants operate continuously regardless of weather conditions, Project Obsidian could strengthen regional grid reliability while supporting broader decarbonization goals.
Safar Partners Reaffirms Commitment
Safar Partners, one of Quaise’s earliest investors, also participated in the Series B financing round.
The investment firm praised the company’s ability to rethink conventional drilling methods and develop technology capable of unlocking geothermal resources previously beyond economic reach.
According to Safar Partners, the transition from scientific research to commercial deployment represents a significant milestone not only for Quaise but for the geothermal industry as a whole.
The firm believes rapidly increasing global electricity demand creates substantial opportunities for scalable clean energy technologies capable of providing dependable power generation.
A New Chapter for Geothermal Energy
The initial $134 million Series B financing represents only one component of Quaise Energy’s broader capital strategy.
Additional project financing, including further equity investments and debt funding, is expected to be announced later this year as Project Obsidian advances toward construction and commercial operation.
With total funding now reaching $230 million, strong support from strategic global energy companies, and continued technical progress in the field, Quaise Energy is positioning itself at the forefront of next-generation geothermal development.
If its millimeter wave drilling technology performs as expected at commercial scale, the company could fundamentally reshape the global geothermal industry by making deep, superhot geothermal resources economically accessible across much of the world. Such a breakthrough would offer utilities and governments a new source of dependable, zero-carbon baseload electricity capable of complementing renewable energy while reducing reliance on fossil fuels.
Source Link: https://www.businesswire.com/
