Canadian company drills almost 100 km of wells up to 4.5 km deep, transforms an abandoned geothermal field into a giant underground radiator, and enables Germany to receive electricity from a closed-loop geothermal system on the public grid for the first time.

Written by Valdemar Medeiros

Published on 25/04/2026 at 11:14

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Innovative geothermal system drills 90 km of wells in Germany and generates energy without using groundwater, connecting electricity to the grid in 2025.

According to Eavor Technologies, on December 4, 2025, the company delivered the first electrons generated by a multilateral closed-loop geothermal system to Germany’s commercial power grid. The project was implemented in Geretsried, a city of about 15,000 inhabitants in southern Bavaria, approximately 40 kilometers from Munich. The land had previously been used for a conventional geothermal exploration attempt, abandoned in 2013 after hot, but dry rock with insufficient permeability for underground fluid circulation was identified.

Limitations of conventional geothermal energy restrict use to less than 1% of the planet’s surface

Traditional geothermal energy depends on the natural existence of underground reservoirs with hot water or steam. This type of formation occurs in geologically specific regions, such as Iceland, Kenya, New Zealand, and parts of the western United States.

Globally, these conditions represent less than 1% of the Earth’s surface. Although heat is present in virtually all of the Earth’s crust, the absence of fluid and porosity limits the use of conventional technology.

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Eavor Loop system eliminates need for groundwater with sealed closed-loop

Eavor’s proposal is based on a closed-loop system known as the Eavor Loop. The concept functions as an underground radiator. A fluid circulates through a set of sealed pipes installed in hot rocks, absorbing heat and returning to the surface without ever coming into contact with the geological environment.

This model eliminates the need for aquifers, prevents fluid loss, and avoids hydraulic fracturing, reducing operational and environmental risks.

The project engineering involves drilling two vertical wells separated by about 220 meters, reaching depths of approximately 4.5 kilometers.

From these points, interconnected horizontal galleries are opened, forming a continuous closed loop. Each loop is about 3 kilometers long, with multiple connections forming an underground network. The complete system foresees about 90 kilometers of total drilling distributed among four loops.

Thermosiphon circulation allows geothermal system operation without mechanical pumps

The system uses the thermosiphon principle for fluid circulation. The cold fluid naturally descends, absorbs heat from the rock, becomes less dense, and returns to the surface. This process occurs continuously without the need for active pumping.

The absence of moving parts reduces energy consumption and simplifies operation. The chosen location for system implementation had been considered unfeasible for conventional geothermal energy due to the rock’s lack of permeability.

Illustration of the Eavor system’s operation – CPG

For the Eavor model, this characteristic becomes an advantage, as the system does not depend on the natural circulation of fluids. The dry, hot rock, previously seen as an obstacle, became an ideal condition for closed-loop operation.

Investment exceeding 350 million euros gathers support from European Union, European Investment Bank, and major global companies

The project received €91.6 million in funding from the European Commission’s Innovation Fund and a €45 million loan from the European Investment Bank.

In addition, it received contributions from investors such as OMV, Chubu Electric Power, bp Ventures, BHP Ventures, and Microsoft Climate Innovation Fund. The total investment exceeded €350 million.

The project execution faced significant challenges, especially in horizontal drilling through hard rock. One of the main obstacles was ensuring that horizontal wells met with precision kilometers deep.

To solve this, the company developed the **Eavor-Link AMR** tool, which allows electromagnetic communication between drilling systems, reducing the time required for alignment by more than 80%.

New drilling technologies increase efficiency and reduce operational costs

Another advancement was the development of thermally insulated drilling pipes, allowing operation in high-temperature environments.

These innovations increased tool durability by up to three times and significantly reduced drilling time.

Throughout the project, there was a reduction of about 50% in execution time per segment and more than 40% in construction costs.

System delivers 8.2 MW of electricity and 64 MW of heat for urban heating in Bavaria

The first operational loop provides 8.2 megawatts of electrical energy and 64 megawatts of heat for district heating systems.

The plant operates flexibly, prioritizing heat in winter and electricity in summer, according to demand.

The complete project includes four interconnected loops, with expansion underway. Eavor has already begun planning for a new system in Hanover, with the capacity to meet between 15% and 20% of the city’s urban heating demand.

Closed-loop technology can expand geothermal energy to regions without conventional natural resources

The main innovation of the project lies in the possibility of application in locations without natural geothermal reservoirs.

By eliminating dependence on groundwater and rock permeability, the system significantly expands the geographical potential of geothermal energy.

Drilling industry experts indicate that the same infrastructure used in the oil sector can be adapted for this type of energy generation.

Now we want to know: can closed-loop geothermal systems transform energy generation on a global scale?

The **Geretsried project** demonstrates an alternative for exploring subterranean heat in regions previously considered unfeasible.

In your view, does this technology have the potential to become a global basis for energy generation, or does it still face barriers to large-scale expansion?

Canadian company drills almost 100 km of wells up to 4.5 km deep, transforms an abandoned geothermal field into a giant underground radiator, and enables Germany to receive electricity from a closed-loop geothermal system on the public grid for the first time.

Innovative geothermal system drills 90 km of wells in Germany and generates energy without using groundwater, connecting electricity to the grid in 2025.

Limitations of conventional geothermal energy restrict use to less than 1% of the planet’s surface

Eavor Loop system eliminates need for groundwater with sealed closed-loop

Thermosiphon circulation allows geothermal system operation without mechanical pumps

Investment exceeding 350 million euros gathers support from European Union, European Investment Bank, and major global companies

New drilling technologies increase efficiency and reduce operational costs

System delivers 8.2 MW of electricity and 64 MW of heat for urban heating in Bavaria

Closed-loop technology can expand geothermal energy to regions without conventional natural resources

Now we want to know: can closed-loop geothermal systems transform energy generation on a global scale?

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Canadian company drills almost 100 km of wells up to 4.5 km deep, transforms an abandoned geothermal field into a giant underground radiator, and enables Germany to receive electricity from a closed-loop geothermal system on the public grid for the first time.

Innovative geothermal system drills 90 km of wells in Germany and generates energy without using groundwater, connecting electricity to the grid in 2025.

Limitations of conventional geothermal energy restrict use to less than 1% of the planet’s surface

Eavor Loop system eliminates need for groundwater with sealed closed-loop

Thermosiphon circulation allows geothermal system operation without mechanical pumps

Investment exceeding 350 million euros gathers support from European Union, European Investment Bank, and major global companies

New drilling technologies increase efficiency and reduce operational costs

System delivers 8.2 MW of electricity and 64 MW of heat for urban heating in Bavaria

Closed-loop technology can expand geothermal energy to regions without conventional natural resources

Now we want to know: can closed-loop geothermal systems transform energy generation on a global scale?

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

Chinese engineers begin filling a 217-meter dam at an altitude of 3,000 meters and prepare a 2,240 MW hydroelectric power plant to integrate hydropower, solar, and wind energy in the upper Jinsha.

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Free courses from SEST SENAT: online and flexible training on Logistics with certificate and immediate access

Engineers from Iceland descended 4,659 meters into an active volcanic zone, and the IDDP-2 project found supercritical fluids at 427 degrees and 340 bar of pressure, crossing the boundary where water ceases to be liquid or vapor and begins to concentrate energy at extreme levels.