Plum Acquisition Corp. IV and Controlled Thermal Resources Outline a Large-Scale Geothermal and Critical Minerals Platform Plum Acquisition Corp. IV (“Plum IV”) and Controlled Thermal Resources Holdings Inc. (“CTR”) are moving toward a proposed business combination that would create a public company focused on one of the most ambitious geothermal and critical minerals developments in the United States. The combined entity is expected to trade on Nasdaq under the pro forma ticker CTRH, reflecting a platform built around clean baseload power, lithium recovery, and broader critical minerals production. The investor presentation dated August 2026 frames the transaction around CTR’s Hell’s Kitchen project in Imperial County, California, which is presented as a strategically positioned resource opportunity with energy, minerals, infrastructure, and permitting advantages. At the center of the presentation is a clear message: this is not just a power project, and it is not j...
Eavor Technologies Achieves Historic Milestone: World’s First Commercial-Scale Closed-Loop Geothermal System Now Delivering Power in Geretsried, Germany
Published: December 2025 By: Robert Buluma
The Day Geothermal Changed Forever
On a crisp Bavarian morning in late 2025, a quiet revolution in clean energy officially went live.
Eavor Technologies Inc., the Calgary-based pioneer of closed-loop geothermal technology, announced that its flagship commercial project in Geretsried, Germany has begun delivering power to the grid becoming the world’s first utility-scale multilateral closed-loop geothermal system to achieve commercial operation.
For anyone who has followed the geothermal sector for the last decade, this is nothing short of seismic (pun intended).
What Makes Eavor’s Closed-Loop System Truly Disruptive?
Traditional geothermal plants rely on naturally occurring hot water reservoirs or enhanced geothermal systems (EGS) that require hydraulic fracturing and massive water usage. These approaches have limited geothermal to specific “hot spot” geographies and introduced technical and environmental risks that have slowed global adoption.
Eavor took an entirely different path with the Eavor-Loop™ a giant underground radiator that conducts heat to the surface without ever interacting with reservoir fluids. Here are the four breakthrough advantages that CEO Mark Fitzgerald highlighted in the announcement:
1. Predictable, carbon-free baseload energy No dependence on weather or intermittent resources.
2. Works across diverse geologies No need for rare volcanic or high-permeability zones.
3. No future redrilling required Once sealed, the loop operates for decades with virtually zero maintenance.
4. Minimal land and water footprint Uses a fraction of the surface area and almost no water compared to conventional geothermal or solar/wind farms with storage.
In short: Geothermal Everywhere is no longer a slogan , it’s now a commercial reality.
Geretsried by the Numbers (So Far)
While Eavor has not released final capacity figures yet, early indications are impressive:
The Geretsried project is the first multilateral Eavor-Loop (multiple horizontal legs radiating from two vertical wells).
It is designed to eventually deliver 8–10 MW of electric power plus significant district heating for the region.
The system operates at depths exceeding 4,500–5,000 meters and temperatures around 200+ °C, proving the technology works in deep, hot sedimentary basins common across Europe and beyond.
This is not a pilot. This is not a demonstration. This is a full-scale commercial facility** selling electricity under a long-term power purchase agreement.
Why This Milestone Matters More Than Any Other Geothermal Project Right Now
Let’s be brutally honest: the geothermal industry has been promising “the next big thing” for decades. Enhanced Geothermal Systems (EGS), supercritical projects, and deep direct-use schemes have all generated headlines — and then quietly faded when scaling challenges emerged.
Eavor’s closed-loop approach sidesteps almost every historical barrier:
This is why heavyweight investors like BP Ventures, Chevron Technology Ventures, Vickers Venture Partners, and the Canadian government have poured hundreds of millions into Eavor in recent years.
From Canada to Bavaria: A Rapid Journey to Commercialization
The road to Geretsried actually started in Alberta, Canada, with the Eavor-Lite demonstration facility near Rocky Mountain House in 2019. That 2-loop prototype proved the thermosiphon effect could circulate fluid purely through density differences ,no parasitic pumps needed.
Fast-forward six years and the company has:
Drilled and connected Europe’s deepest onshore wells on the Geretsried site
Partnered with local drilling giants (Deutsche Erdwärme)
Secured €100+ million in non-dilutive grants and debt from the EU Innovation Fund and European Investment Bank
Built an international team of 150+ engineers, geoscientists, and energy veterans
What Comes Next? Global Replication at Speed
Eavor has made no secret of its ambition: 100 projects by 2030.
Already under development or in late-stage planning:
Second German project in Hannover region (with utility E.ON)
Projects in Japan, the United States (Nevada & New Mexico), the Netherlands, and additional sites in Bavaria
Strategic partnerships with turboden (ORC supplier) and Enel Green Power for global rollout
Each new Eavor-Loop benefits from standardized design and manufacturing. The company likens future deployments to “buying a Tesla off the lot” rather than building a custom prototype every time.
The Bigger Picture: Baseload Renewables Are the Missing Piece
Wind and solar are wonderful ,but the grid needs firm, dispatchable, 24/7/365 clean power to fully displace fossil fuels. Lithium-ion batteries can’t economically fill multi-day or seasonal gaps. Nuclear faces decades-long permitting. Hydropower is geographically limited.
This is where closed-loop geothermal shines: capacity factor >95%, no fuel cost, no emissions, tiny land use, and a lifespan measured in decades.
If Eavor (and the handful of other next-gen geothermal players) can replicate Geretsried at scale, the implications are profound:
Heavy industry (steel, cement, chemicals) finally gets affordable 24/7 clean heat and power
Data centers and AI computing clusters can be 100% carbon-free without relying on offsets
Northern European countries can replace Russian gas with domestic baseload renewables
Developing nations can leapfrog coal entirely with a scalable, local resource
Final Thoughts: We Just Witnessed the Birth of Geothermal 2.0
December 2025 will be remembered as the month when geothermal stopped being a niche resource limited to Iceland, New Zealand, and a few pockets of the American West , and started becoming the global baseload solution the world has desperately needed.
Mark Fitzgerald closed the announcement with a simple but powerful line:
“This milestone proves what we’ve always known: 24/7 clean heat and power is possible, scalable, and ready for global deployment.”
The Geretsried Eavor-Loop is now online, quietly humming beneath the Bavarian countryside, delivering clean electrons and heat around the clock.
The age of Geothermal Everywhere has officially begun.
Related: SWU & Eavor Geothermal Project in Neu-Ulm/Senden Fully Cleared After Seismic Survey Success
Source :Eavor
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