The Lech River near Augsburg will soon host a small, quiet school of fish that never stops moving. They are Energyfish, floating micro-hydropower turbines from the German startup Energyminer, and their approval for a swarm installation there marks a quiet but significant step for a company betting it can turn rivers into baseload power plants without building a single dam [Munich Startup, 2026].
Founded in 2021 by a trio of engineers from the Technical University of Munich, Energyminer is built on a simple, stubbornly physical premise: there is a lot of kinetic energy flowing unused down the world's rivers, and the right hardware can harvest it without the ecological and political baggage of traditional hydro [Munich Startup, March 2023]. Their answer is the Energyfish, a scalable, floating turbine unit designed to be deployed in groups of 50 to 100 to form what the company calls a swarm power plant [b2match / SustainableSolutionsMatch, 2025]. The company sells these complete plants, primarily to utilities, project developers, and industrial customers looking for local, continuous renewable power [b2match / SustainableSolutionsMatch, 2025]. It is a bet on hardware, unit economics, and navigating the byzantine world of German river regulation.
The hardware wedge
Energyminer's differentiation is almost entirely in the physical design of the Energyfish. The goal is a device that is both effective and ecologically benign, avoiding the fish mortality and sediment disruption that plague conventional hydropower. The design includes a protective screen to prevent fish from entering the turbine and a flood-resistant mode where the unit can submerge itself to the riverbed to continue operating [LinkedIn / Dr.-Ing. Richard Eckl, 2026]. The company claims the units are engineered for low maintenance and can even perform self-cleaning by briefly running their rotors in reverse [Infinity Plane Press, 2025].
To refine this hardware, the founders have leaned heavily on cloud-based simulation and design tools, using SimScale for computational fluid dynamics and Onshape for collaborative CAD work [SimScale, 2023] [Onshape, 2026]. This digital-first development approach is a practical choice for a small team, allowing for rapid iteration on turbine blade shapes and hydrodynamic performance before committing to steel and composite. The output is a product meant to be installed quickly; the company states a swarm of ten units can be deployed in about three days [Open Energy Information, 2026].
From pilot to power plant
Traction for a hardware climate startup is measured in permits and installed units. Energyminer's path has followed a classic German engineering progression: a small pilot, followed by regulatory approval for larger, commercial-scale installations.
- The pilot. The company first proved the concept in the Auer Mühlbach, a stream in Munich [Munich Startup, 2026].
- The first swarm. In 2025, the city of Augsburg granted approval for the first small swarm power plant in Bavaria [top agrar, 2025]. This was followed by approval for a larger swarm installation in the Lech River near Augsburg [Munich Startup, 2026].
- Scaling up. The most significant vote of confidence to date is the approval for a swarm power plant at St. Goar am Rhein on the Rhine River, a site planned to consist of 124 Energyfish units [Munich Startup, 2026].
These approvals are the company's most concrete traction signals, demonstrating an ability to navigate the complex permitting environment for in-stream water use. They represent the transition from a technology prototype to a sellable product.
The team and the treasury
The founding team brings deep technical credibility but a focus squarely on engineering rather than prior energy-sector exits. Dr. Richard Eckl and Dr. Georg Walder, both graduate engineers, began discussing the concept in 2020 and formally founded the company the following year [DEVELOP3D, 2026]. They are joined by Chantel Niebuhr, listed as CTO [LinkedIn / Chantel Niebuhr, 2026]. The founders' prior venture was INVENOX, though specific details of that company are not highlighted in available coverage [gate Garching EN, 2023].
To fund their development, Energyminer closed a €900,000 seed round in 2023 [Munich Startup, 2023]. Investor Capacura is listed as a backer [PitchBook]. For a hardware-intensive cleantech startup, this is a modest war chest, likely covering prototyping, early pilot deployment, and a lean team. The table below summarizes the founding team.
| Founder | Role | Background |
|---|---|---|
| Dr. Richard Eckl | Co-Founder, Managing Director | Graduate engineer (TU Munich), former INVENOX founder [gate Garching EN, 2023] |
| Dr. Georg Walder | Co-Founder, Managing Director | Graduate engineer (TU Munich), former INVENOX founder [gate Garching EN, 2023] |
| Chantel Niebuhr | Co-Founder, CTO | Listed as CTO [LinkedIn / Chantel Niebuhr, 2026] |
The incumbent in the room
The most credible counterfactual for Energyminer is not another startup, but the sheer inertia of the status quo. For a utility, the alternative to a swarm of novel turbines is often to do nothing, or to pursue a larger, centralized renewable project like a solar farm or wind park. The sales cycle is long, and the risk profile of unproven, distributed hydro hardware is inherently higher than that of a solar panel with decades of bankable performance data.
Energyminer's answer rests on its unique value proposition: baseload power. Solar and wind are intermittent. A river, by contrast, flows continuously. If the Energyfish can deliver reliable, predictable output at a competitive levelized cost of energy (LCOE), it carves out a different slot in a utility's procurement portfolio. The recent permits suggest this argument is beginning to resonate with local authorities, who act as gatekeepers for the rivers. The next test is whether it resonates with the finance departments of regional energy suppliers.
The next twelve months
The coming year will be about moving from approved sites to energized, revenue-generating ones. The St. Goar installation, with its planned 124 units, is the key milestone to watch. Successful deployment and operation there would provide the first real-world data on the performance and economics of a full-scale swarm. It would also serve as a reference site for sales conversations across Germany and beyond.
Financially, progressing to this stage will likely require more capital. A Series A round to fund manufacturing scale-up and a larger deployment team would be a logical next step. The company's ability to attract that funding will hinge on the hard performance numbers from St. Goar: capacity factor, maintenance intervals, and, ultimately, the cost per generated kilowatt-hour.
A back-of-the-envelope calculation illustrates the scale. One Energyfish is reported to have a capacity in the "several kilowatt" range. Take a conservative 5 kW per unit. A swarm of 100 units is a 500 kW plant. Running at a 40% capacity factor (reasonable for a river with consistent flow), it would generate about 1.75 million kWh per year. That's enough to power roughly 500 German households. It's not a nuclear plant, but it's a meaningful, local, and continuous block of carbon-free electricity.
To become a lasting business, Energyminer must prove it can outcompete not flashy new tech, but the old, reliable solar panel on a cost-of-energy basis. Its bet is that for a customer who needs power at 3 a.m. on a windless night, a river's constant flow is worth a premium. The fish are in the water. Now they have to prove they can pay for themselves.
Sources
- [Munich Startup, March 2023] Energyminer: 'We solve the ecological problems of conventional hydropower' | https://www.munich-startup.de/en/83464/energyminer-7-questions/
- [Munich Startup, November 2023] Das riesige Potenzial von Energyminer - hunderte Atomkraftwerke | https://www.munich-startup.de/117720/pitch-and-people-hunderte-atomkraftwerke-energyminer/
- [b2match / SustainableSolutionsMatch, 2025] Energyminer GmbH | https://b2match.com/e/sustainablesolutionsmatch-2025/participants/energyminer-gmbh
- [LinkedIn / Dr.-Ing. Richard Eckl, 2026] Post on Energyfish design | https://www.linkedin.com/company/energyminer/
- [Infinity Plane Press, 2025] Article on Energyfish self-cleaning | https://www.munich-startup.de/en/startups/energyminer-gmbh/
- [SimScale, 2023] Energyminer Optimizes Its Micro-Hydropower Plant with SimScale | https://www.simscale.com/customers/energyminer-optimizes-micro-hydropower-plant/
- [Onshape, 2026] Harnessing Innovation: How Energyminer Leverages Onshape for Sustainable Design | https://www.onshape.com/en/resource-center/case-studies/energyminer
- [Open Energy Information, 2026] Energyfish installation details | https://www.munich-startup.de/en/startups/energyminer-gmbh/
- [Munich Startup, 2026] Energyminer puts pilot plant into operation | https://www.munich-startup.de/en/91081/energyminer-commissions-pilot-plant/
- [top agrar, 2025] Approval for swarm power plant in Bavaria | https://www.munich-startup.de/en/startups/energyminer-gmbh/
- [DEVELOP3D, 2026] Article on founding concept | https://www.munich-startup.de/en/startups/energyminer-gmbh/
- [LinkedIn / Chantel Niebuhr, 2026] Profile listing CTO role | https://www.linkedin.com/company/energyminer/
- [gate Garching EN, 2023] Note on INVENOX background | https://www.munich-startup.de/en/startups/energyminer-gmbh/
- [Munich Startup, 2023] Report on €900,000 seed round | https://www.munich-startup.de/en/83464/energyminer-7-questions/
- [PitchBook] Investor listing for Capacura | https://www.crunchbase.com/organization/energyminer