Published on: April 1, 2025 / update from: April 1, 2025 - Author: Konrad Wolfenstein
Solarpark project on the Autobahn: Inter-municipal cooperation between Sinzheim, Baden-Baden and Hügelsheim-creative image: Xpert.digital
8 megawatts for the environment: Solarpark is promoting energy transition
Regional lighthouse project: Solarpark drives climate protection and energy production
Together with Baden-Baden and Hügelsheim, the municipality of Sinzheim is developing an inter-municipal solar park along the highway, which is supposed to play an important role in the regional energy transition. With a planned performance of around 8 megawatts, this project will make a significant contribution to achieving the climate protection goals in Baden-Württemberg and strengthen local energy production. The project is an example of the increasing use of transport infrastructure areas for the extraction of renewable energy and demonstrates the advantages of inter -municipal cooperation in the field of solar energy.
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The inter -municipal solar system: key data and meaning
The municipality of Sinzheim is actively working on the development of an inter-municipal open space in cooperation with the city of Baden-Baden and the municipality of Hügelsheim. This photovoltaic system is expected to achieve an expected performance of around 8 megawatts and is built along the motorway route. The strategic location on the motorway enables efficient double use of already sealed or pre -used areas and thus reduces potential usage conflicts with agricultural or nature conservation areas.
The cooperation between the three municipalities illustrates an important concept in the regional energy transition: through community action, larger projects can be realized that may not be possible for the individual municipalities alone. This also corresponds to the growing trend towards regional energy management, as described in the climate protection concept for climate-friendly heat and cold use in the Rastatt district.
Further solar projects in the region
In parallel to the inter -municipal project, another important solar project is already developing in Sinzheim. Trianel GmbH with the Solnet as a project developer is building a photovoltaic system with 5.2 megawatts on the area of the Waldhof in Sinzheim. This facility is located west of the A5, about 1.5 kilometers west of marting.
The Solarpark of Trianel GmbH is equipped with a total output of 5.2 MWP and is intended to generate around 6.5 million kilowatt hours of electricity annually. With around 12,500 modules, the system will be able to supply around 1,650 households with electricity and save around 5,700 tons of CO₂ annually compared to electric production from lignite. The approval procedure should be completed at the end of 2023, with a planned start of construction in late 2024 or early 2025.
Ideal conditions for solar energy in the region
The geographical location of Sinzheim, Baden-Baden and Hügelsheim offers excellent prerequisites for the use of solar energy. The municipalities are in the Rhine level, one of the sunniest regions in Germany. This region has an average of around 1,800 to 2,000 hours of sunshine per year and an annual global radiation of around 1,150 kWh/m².
The specific solar yield in Sinzheim is around 950 to 1,100 kWh per KWP installed photovoltaic performance. These values are above average for Germany and make the region particularly attractive for solar projects. The favorable climatic conditions contribute significantly to the economy and efficiency of the planned solar systems.
Funding programs and political support
The state of Baden-Württemberg supports the expansion of solar energy along traffic infrastructures with special funding programs. The program “Spaces Double Double - PV of mobility infrastructures” could be particularly relevant for the inter -municipal project, for which the State Environment Ministry provides a total of four million euros. Among other things, this program promotes investments in photovoltaics on noise barriers, but also photovoltaic roofing along traffic routes.
The political support for solar energy in Baden-Württemberg is generally strong. The country has set itself the goal of making two percent of its state area available for wind power and photovoltaics. At the end of 2020, the proportion of renewable energies in electricity generation in Baden-Württemberg was around 41 percent, with photovoltaics being the largest renewable energy source with a good 14 percent.
Integration with regional infrastructure projects
The placement of the solar park along the motorway could possibly be coordinated with other regional infrastructure projects. In particular, there are plans for the better connection of the Baden Airpark and the Karlsruhe/Baden-Baden Airport to the motorway, which also affect the municipality of Hügelsheim. Two possible variants with tunnels were developed for this, with a steering group from representatives of the Baden-Württemberg Ministry of Transport, the Karlsruhe regional council, the district of Rastatt and the municipality of Hügelsheim are involved in these plans.
The combination of infrastructure and energy projects could enable synergy effects and increase efficiency in planning and implementation. Such integrated planning also corresponds to the concept of double land use, which is becoming increasingly important in Baden-Württemberg.
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Citizen participation and local acceptance
The support of the local population is crucial for the success of Solarpark projects. The municipality of Sinzheim has already gained experience in promoting solar energy at the local level with its solar campaign “sunny Sinzheim”. This campaign offers citizens information about the installation of photovoltaic systems on their roofs or balcony power plants and could serve as a model for information and participation formats around the planned inter-municipal solar park.
Citizen participation is also planned at the Solarpark of Trianel GmbH. Residents with the main residence in the community in which the solar park is to be built have the opportunity to take part in the project financially. Similar participation models could also be discussed for the inter -municipal solar park in order to strengthen local acceptance and to keep the added value in the region.
Inter-municipal solar park: Design the energy transition in Baden-Württemberg together
The inter-municipal solar park project of Sinzheim, Baden-Baden and Hügelsheim represents an important step in the regional energy transition. With its strategic location along the motorway, it uses the concepts of double use of areas and inter -municipal cooperation in order to make a substantial contribution to sustainable energy supply.
The favorable climatic conditions in the region, the political support at the state level and the possibility of linking to other infrastructure projects create positive framework conditions for the success of the project. In combination with other solar park projects such as Trianel GmbH, the region could become a pioneer for sustainable energy generation in Baden-Württemberg.
It remains to be seen how the specific plans will develop and which models are implemented for citizen participation. In any case, the experiences from this project could provide valuable knowledge for similar projects in other regions of Germany and contribute to the acceleration of the energy transition.
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