Germany Launches World’s First Vertical Floating Solar Plant
Published · 4 min read
Germany has activated the world’s first vertical floating solar plant, marking a breakthrough in renewable energy design that could unlock thousands of artificial lakes for clean power generation.
The 1.87-megawatt facility sits on a gravel lake in Bavaria’s Starnberg district near Munich. Developed by SINN Power, the installation uses roughly 2,500 bifacial solar panels mounted upright on the water rather than lying flat like traditional systems.
The plant began operations this year and now generates approximately 2 gigawatt-hours of electricity annually, enough to power hundreds of households.
How the Technology Works
The panels stand vertically in long rows running east to west across the Jais gravel pit, resembling glass fences rising from the water. This orientation captures sunlight more effectively during early morning and late afternoon hours when energy demand peaks.
SINN Power’s patented “Skipp Float” technology anchors the panels with a keel-like structure extending 1.6 meters below the surface. Shore-mounted cables secure the system while allowing it to flex with waves and changing water levels.
The bifacial panels generate electricity from both sides. Water reflection boosts rear-side capture, while the lake’s cooling effect prevents the efficiency losses that affect land-based systems in hot weather.
The installation covers just 4.65% of the lake’s surface, well below Germany’s 15% legal limit for water-based solar projects. Four-meter gaps between panel rows allow wind and sunlight to reach the water, maintaining healthy oxygen levels.
Business Benefits Drive Adoption
The gravel company operating the pit now receives most of its power on-site. Energy-intensive equipment including crushers, conveyor belts and pumps have reduced grid reliance by approximately 60% since the plant launched.
A planned second phase will add another 1.7 megawatts of capacity. The expansion should push the site to 70% energy self-sufficiency, shielding the business from volatile electricity prices.
For industrial operations with high daytime energy demands, the model offers substantial cost savings and energy security.
Massive Untapped Potential Across Germany
Germany has more than 6,000 artificial lakes covering over 90,000 hectares. Most are gravel pits, quarries and mining lakes already unsuitable for agriculture or conservation.
Research from the Fraunhofer Institute for Solar Energy Systems shows these water bodies could support between 1.8 and 2.5 gigawatts of solar capacity. Only a fraction is currently used.
This addresses a critical challenge in Germany’s energy transition. The country aims to reach 215 gigawatts of solar capacity by 2030, up from the current 117 gigawatts. That requires adding an average of 19.6 gigawatts annually.
Finding suitable land has become increasingly difficult and expensive. Floating solar eliminates the land-use conflict entirely by utilizing already-industrialized water surfaces.
Grid Stability Advantages
The vertical orientation produces more power during morning and evening hours rather than midday peaks. This naturally smooths energy supply throughout the day, making the system more valuable to grid operators.
Traditional flat solar installations create what energy experts call the “duck curve,” a midday supply spike that strains the grid. The vertical design avoids this problem.
With wind and solar now providing over half of Germany’s electricity, grid stability depends on diversifying generation patterns. The Jais plant demonstrates how panel orientation can improve system integration.
Environmental Monitoring Continues
Early monitoring shows no decline in water quality at the Bavarian site. The spacing between panels and open water corridors prevent stagnation and allow adequate sunlight and air circulation.
Some observations suggest the floating structures may provide new habitats for local fish and waterbirds.
However, researchers emphasize the need for long-term studies. Experts have called for comprehensive research to fully understand how large-scale floating installations affect aquatic temperatures, oxygen cycles and ecosystem dynamics over extended periods.
The project’s environmental monitoring will provide valuable data for future floating solar developments across Europe.
What Comes Next
Other German states are exploring similar projects, particularly North Rhine-Westphalia with its extensive gravel mining regions. International interest is growing, with floating solar installations now under development in the Netherlands, France and Greece.
Recent German policy initiatives aim to boost floating solar development on artificial lakes. The Jais project proves that large-scale renewable energy can coexist with industrial infrastructure and water management.
The transition from pilot projects to widespread deployment will require continued policy support, standardized engineering practices and environmental safeguards. But the technology works and delivers real energy production benefits.
The vertical floating solar plant represents a practical solution to land-use challenges threatening Europe’s renewable energy ambitions. As climate urgency grows, the innovation demonstrates that creative thinking can unlock clean energy from previously unusable spaces.
References:
- Solar Vision: Germany Launches World-First Vertical Floating Solar Plant
- Fraunhofer Institute for Solar Energy Systems: Floating Photovoltaics
- SINN Power Official Website
