The new geothermal system in Germany is Eavor’s Geretsried Eavor-Loop in Bavaria. On December 4, 2025, Eavor said the facility had begun delivering electricity to the German grid, marking partial commercial operation. The project’s planned district-heating service and full stated capacity are separate milestones; the available project updates do not establish that full heat delivery is already underway.
What is the new geothermal system in Germany?
Geretsried is a deep geothermal energy project built around Eavor’s closed-loop design. Rather than pumping naturally occurring hot water from underground, it circulates a heat-transfer fluid through connected wells, where the fluid absorbs heat from surrounding rock and carries it back to the surface. Eavor describes the system on its Geretsried project page; the Associated Press has also explained how the approach differs from conventional geothermal projects.
The distinction matters in Geretsried. The Associated Press reported that earlier conventional geothermal attempts there failed to find enough hot water for a profitable project. That history helps explain local interest in a system that does not rely on producing underground thermal water, but it does not establish that the newer project has overcome every technical or economic challenge.
How does the Eavor-Loop work?
Heat moves through a closed circuit
In Eavor’s description, fluid remains inside the well system: it travels underground, picks up heat from rock, returns to the surface, and circulates again. The system is designed to use heat conducted from the surrounding rock without extracting geothermal water. The Associated Press reported that the Geretsried installation does not hydraulically fracture rock to create permeability.
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Connected wells create the underground heat exchanger
Eavor’s December 2025 announcement says the Geretsried installation has two vertical wells, each branching into six horizontal laterals. Underground, the laterals are joined in six pairs. Eavor reports 16 kilometres of continuous wellbore per pair, and its project page gives an approximate drilling depth of 4,500 metres. These are company-reported design details, not independent measurements of the plant’s current output.
Is Geretsried already producing electricity?
Yes. Eavor announced on December 4, 2025 that electricity from the project had first been delivered to the German grid, and described Geretsried as in partial commercial operation. The company’s milestone announcement is available at Eavor’s December 2025 release. This confirms an initial electricity delivery; it is not evidence that the project has reached its full planned output.
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Electricity delivery and district heat service are distinct parts of the project. Eavor describes both as intended outcomes for the region, but the sources available do not establish that the planned full heat service is already being delivered. The first-grid-electricity milestone should not be read as confirmation that every planned service is online.
What capacity and emissions savings does Eavor project?
Eavor lists approximately 8.2 MW of electrical capacity, 64 MW of thermal capacity, and estimated savings of 44,000 tonnes of CO₂-equivalent per year for Geretsried. These are developer-reported project figures, not independently verified current production or measured annual savings. The project page presents them as planned project values rather than proof that the facility is already operating at those levels.
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How does closed-loop geothermal differ from conventional geothermal?
| Feature | Geretsried Eavor-Loop | Conventional geothermal context |
|---|---|---|
| Underground fluid | Heat-transfer fluid circulates in connected wells; the design does not depend on producing thermal water, according to Eavor. | Some conventional geothermal projects depend on accessible naturally occurring hot water, as described by the Associated Press. |
| How heat is collected | Fluid absorbs heat from surrounding rock as it moves through the closed well network, according to Eavor. | Geothermal heat is commonly obtained by producing underground thermal water; the Associated Press used this contrast in its reporting on Geretsried. |
| Rock stimulation | The Associated Press reported that the Geretsried system does not hydraulically fracture rock to create permeability. | Not stated in the cited reporting as a universal feature of conventional geothermal projects. |
| What is established at Geretsried | Eavor announced first electricity delivery to the grid and partial commercial operation in December 2025. | Not applicable as a single comparable project milestone. |
This is a comparison of the system design and the conventional approach described in reporting, not a claim that all geothermal plants use identical methods. Well construction, local geology, performance, and project economics can differ from site to site.
Why is the project significant for Germany?
Germany’s Federal Ministry for Economic Affairs and Climate Action reported that geothermal sources provided roughly 26 terawatt-hours of heat in 2023, about 9% of the country’s renewable heat. Those are national figures, not Geretsried production numbers. They provide context for the role geothermal energy already plays in Germany’s renewable heat supply, while Geretsried demonstrates a different, closed-loop design.
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Eavor announced in March 2023 that Geretsried had received a €91.6 million European Innovation Fund grant. The award amount is based on the company’s announcement, not an independently confirmed grant record. The project page also quotes Bavarian State Minister for the Environment and Consumer Protection Thorsten Glauber describing the system as a potential way to obtain geothermal energy from deep rock without thermal water and to supply power and municipal heat.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What remains to be demonstrated?
The December 2025 electricity delivery establishes that the project has reached an important operational milestone, but the reported capacity figures should not be confused with current metered output. The evidence available also does not confirm full district-heat delivery or independently measured annual emissions savings. Those distinctions are important when assessing the project: a first delivery is evidence of operation, while sustained output, heat service, and performance at the stated project figures are separate questions.
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