Photovoltaics

Ground-Mounted and Rooftop Systems

We finance, plan, and build photovoltaic systems on rooftops and open spaces in Germany and Europe. The minimum system size (rooftop area) is generally 500 kWp. Buyers include both investors and the property owners themselves, who may also partner with us as co-investors in some cases.

Are you planning to install a large-scale solar power system?

Would you like to use existing roof or open spaces, or make them available for a fee?

Would you like to invest with us?

Please contact us.

Are you the owner or operator of one or more photovoltaic systems? So are we! From the perspective of both the owner and the investor, we focus on monitoring, maintenance, and service work for rooftop and ground-mounted systems with a minimum capacity of 20 kWp (rooftop) or 500 kWp (ground-mounted). Customers with a total capacity of approximately 27.5 MWp have already placed their trust in the Ranft Group, both domestically and internationally, and entrusted us with this demanding task. In addition to our extensive experience, we utilize state-of-the-art technology and equipment. And upon request, we also handle the commercial management of the operations.

Our Range of Services

Individual Maintenance
Maintenance Contracts
Performance Check
Repowering
Business Administration
Technical Operations Management
Monitoring

Cleaning
Financing
Insurance
Retrofit
Direct Marketing
Storage Technology
Recertification Test in Accordance with VDE

Monitoring solutions commonly available on the market typically monitor only inverters. From our many years of experience, we know that the standard values determined in this way are completely inadequate. Such a static view fails to take into account potential problems that can arise anywhere from the module array and cabling to various levels of soiling. Such yield-reducing factors often go undetected for months or even years when relying solely on inverter monitoring. The result: Yields can drop significantly, unnoticed and over an indefinite period of time. This has a drastic impact on the annual bottom line!

Satellite-Based Monitoring

With our professional monitoring system, we consistently monitor all performance-critical system components and parameters. In addition, we validate the collected data using our satellite-based performance reference measurement. This simulates the power a solar system is expected to generate at a specific point in time. In addition to the measured solar irradiance, any cloud cover over the relevant area is taken into account. An algorithm is then used to simulate how much power the system should generate based on its size, orientation, tilt, and other parameters. Only these regularly calculated power values provide reliable benchmarks. When combined with our multi-parameter monitoring, these values can be used to ensure objective and transparent monitoring throughout the year.

Ideal not only for solar installers

Our monitoring system enables solar installers and investors to monitor multiple systems at a glance. It is designed for a wide variety of solar installations, and power plants can be directly compared and contrasted with just a few mouse clicks. The comparison options generated in this way provide additional transparency and an invaluable advantage over traditional, one-dimensional solutions. In addition, it provides a meaningful benchmark against comparable PV systems in the surrounding region.

In recent years, many small and medium-sized businesses have expanded their workforce and adapted their infrastructure in response to the booming PV market. At the same time, their customer base has surged dramatically due to the large number of systems installed. Now that the national PV market has experienced a major slump, many small and medium-sized businesses are facing the problem of having a large photovoltaic customer base but no longer being able to provide optimal service to it.

As a professional service and maintenance company, we therefore offer you the following:

We manage your existing customer base
We secure maintenance and follow-up contracts
We will hire you as a subcontractor

Benefits for You

We reach out to your customers on behalf of both us and you
Your customers feel well taken care of by you
Your customers can contact us directly with any questions—this takes the pressure off you
With minimal marketing effort, you can provide comprehensive customer service
We secure follow-up orders during months with low sales (e.g., using storage technology)
We schedule maintenance and coordinate the dates with you
We can handle all PV-related services on your behalf
Even facilities located far outside your service area can now be optimally managed
Your name always appears on all letters sent to your customers

Please contact us.

Current Projects

Solar Power Project with Green Energy Storage in Baden-Württemberg

Successful Sale of the Serragarofalo Solar Project in Sicily

Westeregeln Ground-Mounted Solar Power Plant

Ground-Mounted Solar Power Plants in Germany

Pirna

The ground-mounted PV plant is located in Pirna along a railroad line. The DC side of the plant was completed in December 2024. Starting May 1, 2025, the plant will feed approximately 17 million kWh into the grid annually.

State: Saxony
Capacity: 16.25 MWp
Modules:Tenka Solar – Orion Series IX bifacial 700-watt
Inverters:SUN 2000-330 KTL from Huawei

Riedenheim

The Riedenheim ground-mounted solar power plant is located only about 30 km from our main site in Bad Mergentheim. The plant was constructed and completed in 2024.

State:Bavaria
Capacity: 10 MWp
Modules:Longi HTD 580W from Longi
Inverters:SUN2000-330KTL-H1 from Huawei

Obergessertshausen

To help drive the energy transition in Germany, the Ranft Group is building a 5 MWp ground-mounted solar plant in Obergessertshausen (Bavaria). The plant was sold after completion.

State:Bavaria
Capacity:5 MWp
Modules:Longhi LR5-72-HBD 550 modules
Inverters:Huawei Sun 2000 215 KTL

Oranienbaum

The Oranienbaum existing plant project is one of our first existing plant projects to be upgraded to the latest technical standards and expanded as part of the EnSig amendment. The existing plant was made more efficient through repowering, and the park was also expanded by 5 MWp with an extension.

We’ll start with the Oranienbaum solar park (8 MWp), which will be expanded by approximately 5 MWp in 2023 once the repowering of the existing plant is complete.

State:Saxony-Anhalt Capacity:13 MWp
Modules:LONGi Solar, Canadian Solar
Inverters:Huawei string inverters, SolarMax central inverters

Bad Langensalza I & II

The 9.25 MW solar power plant was commissioned on May 7, 2021. The plant was also connected to the grid on that date. We are very pleased that the plant is now feeding electricity into the public grid. We would like to thank Project Manager Stefan Hauf and our team for the successful implementation of this project. The optional expansion area, with a nominal capacity of approximately 5 MW, is to be implemented in two phases. The first construction phase was completed in December 2021. The plant was also connected to the grid in December 2021. The plant is part of a Power-to-X project.

Pocking II Solar Park

Solarpark Pocking II GmbH, a company of the Ranft Group, has constructed an open-field solar power plant in the Passau district, between Pocking and Bad Füssing, on a former Bundeswehr military training area covering an area of approximately 36 ha (including compensatory areas). The plant, with a total capacity of 12 MWp, was commissioned on December 9, 2009. The photovoltaic plant was constructed using 26,087 high-performance polycrystalline modules with a rated power of 230 W (WSP-230Wp) and 27,273 high-performance polycrystalline modules with a rated power of 220 W (WSP-220Wp).

Coburg Solar Park

The Ranft Group was commissioned by a project company to manage and finance the Coburg solar park. A ground-mounted photovoltaic system with a total capacity of 1,386 kWp was constructed there . The photovoltaic system was constructed using 6,300 Winaico WSP-220-P6 polycrystalline modules, each with a rated output of 220 Wp, manufactured by Winaico Solar GmbH, as well as inverters manufactured by Bonfiglioli Vectron. The system was connected to the grid on June 30, 2010. To finance the project, the Ranft Group provided interim financing totaling 4.0 million euros from its cash reserves during the construction phase. In addition, the Ranft Group supplied all of the modules and inverters. The entire Coburg Solar Park facility has been sold to various private investors.

HuRa Solar Park

Solarpark HuRa GbR, a company of the Ranft Group, has constructed another photovoltaic plant in the “Am Rottwerk” industrial park in Pocking. Covering an area of approximately 1.86 ha, the plant has a capacity of 653.4 kWp. The single-axis tracking system is equipped with 2,904 modules from Winaico Solar GmbH, each with a capacity of 225 Wp. Some of these modules are mounted on a carport as a rooftop system. Schneider Elektrik GmbH supplied a central inverter as part of a complete station. In addition, a small office building with a post-and-beam structure was erected to serve as the operations center for the Pocking facility. The construction of the substructure, including module installation, was completed in a record time of just 6 working days. The planned commissioning (December 31, 2010) took place before Christmas 2010. The photovoltaic system remains the property of the Ranft Group.

Walbeck Solar Park

The Ranft Group has acquired an existing photovoltaic plant in Saxony-Anhalt. It also acquired the underlying properties in the thriving Hettstedt–Walbeck Technology and Business Park with a total area of approximately 56,000 square meters. This strategic investment thus links the Ranft Group’s two core business areas: real estate and renewable energy. The Ranft Group will also be responsible for the technical and commercial management of the facility going forward. The plant was commissioned on December 31, 2011, and has been operated by the Ranft Group since April 1, 2014. The solar park will be operated in accordance with the EEG until at least December 31, 2031. The photovoltaic plant was constructed using high-performance monocrystalline modules with a rated output of 235 W.

Nordhausen Solar Park

In Thuringia, the Ranft Group has acquired an existing photovoltaic plant covering an area of approximately 75,000 square meters. The solar park is located in an industrial park between Nordhausen and Bielen and is divided into three sections by the street “Im Krug.” The Group also acquired the properties in the thriving Nordhausen industrial park. Once again, through this strategic investment, the Ranft Group is linking its two core business areas: real estate and renewable energy. The Ranft Group has been operating the plant since August 1, 2014. Since then, the group has been responsible for monitoring as well as technical and commercial management. The plant was completed on December 31, 2011. In accordance with the EEG, the solar park will remain in operation until at least December 31, 2031. The photovoltaic plant was constructed using monocrystalline high-performance modules with a rated output of 235 W.

Teterow Solar Park

Teterow is a town in the Rostock district of Mecklenburg-Western Pomerania (Germany), where the Ranft Group has added another photovoltaic plant to its portfolio of power generation facilities. Since April 23, 2019, the plant has been operated and monitored by the Ranft Group. The ground-mounted system was constructed and commissioned back in 2011, and has been reliably generating electricity ever since. The photovoltaic system has a DC peak output of 609.58 kWp, generated by modules from Canadian Solar. The electricity is converted via inverters from Siemens with an AC feed-in capacity of 576 kW.

Türkheim-Irsingen Solar Park

Irsingen is a district of the market town of Türkheim in the Unterallgäu district of Bavaria (Germany); here, the Ranft Group has added another photovoltaic plant to its portfolio of power generation facilities. The plant is operated and monitored by the Ranft Group. The ground-mounted system was constructed and commissioned back in 2010, and has been reliably generating electricity ever since. The photovoltaic system features First Solar FS-277 modules. The electricity is converted using SMA Sunny Central inverters with an AC feed-in capacity of 3,611.5 kWp.

Ground-Mounted Solar Power Plants in Italy

Tuscania Solar Park

The Tuscania photovoltaic plant is located approximately 90 kilometers northwest of Rome in the province of Viterbo, part of the historic region of Tuscany, Italy. Covering an area of approximately 2 ha, a plant with a capacity of 884 kWp was built here. The horizontally tracked system was equipped with 3,762 modules from Winaico Solar GmbH, each with a capacity of 235 Wp. The plant was commissioned in April 2011.

Augusta Solar Park

The plant was connected to the grid and commissioned in August 2011. The electricity generated by the plant is sold directly to the Italian company ENEL.

Santalanea Solar Park

Following the plants in Tuscania and Augusta, another 1-megawatt plant was constructed in the Santalanea area, in the Syracuse region of southern Sicily. This ground-mounted solar plant was built by Ranft Projekte 20 GmbH (as the general contractor). The electricity generated is also fed into ENEL’s Italian power grid. The plant was completed in August 2011.

San Cologero Solar Park

Carmito Solar Park

The 1 MW Carmito ground-mounted solar power plant is located in Lentini, a town in the province of Syracuse in the region of Sicily, Italy (not far from the solar parks in Italy that have already been completed). The plant began operations in November 2011.

Roof-Mounted Systems in Germany

: Solar panels are installed on a sloped white metal roof with a green chain-link fence (on the left). In the background, a street is visible with a truck and parked cars. The scene takes place under a cloudy sky, suggesting overcast weather.

: A long row of solar panels is installed on a sloped roof and stretches into the distance. The dark surfaces of the panels partially reflect the light. In the background, leafless trees are visible against an overcast sky. A metal-grating walkway runs alongside the roof.

: A roof covered with numerous solar panels under a partly cloudy blue sky. The panels are neatly arranged in rows and surrounded by small skylights. Trees are visible in the background, and hills can be seen in the distance. A metal railing runs along the edge of the roof.

: Aerial view of a building with a long, narrow roof covered with solar panels. The building is surrounded by paths and green trees. It has a triangular glass entrance and a hedge running parallel to the building. A parking lot is visible on one side.

: Aerial view of four large industrial buildings with roofs covered in solar panels, surrounded by trees with autumn foliage. A railroad track runs parallel to the right, and a small building can be seen nearby. The area is clean and organized, highlighting renewable energy.

: Aerial view of a building with a red roof equipped with several large solar panels. The solar panels are arranged in rows across various sections of the roof. Trees and other buildings can be seen in the surrounding area, suggesting a suburban setting.

: Aerial view of two buildings with solar panels on their roofs. One building is larger and has a red-tiled roof; the other is smaller. Several vehicles are parked on the surrounding concrete area. The landscape features grass and a winding road. Trees line the perimeter.

: A large building roof covered with numerous solar panels arranged in neat rows. The building is surrounded by bare trees, and a paved area can be seen in the foreground. Several skylights are integrated into the roof between the solar panels.

: Aerial view of a rural landscape with two large farm buildings surrounded by expansive fields. One of the buildings has solar panels on its roof. The fields are vast and brown, suggesting land outside the harvest season or recently harvested land beneath a clear blue sky. Trees are visible on the distant horizon.

: Aerial view of a row of rectangular buildings with solar panels on their roofs, surrounded by fields. Trees border the buildings, and nearby there is a mix of cultivated and uncultivated land. The buildings appear to be arranged in a grid-like pattern.

: Aerial view of a farm with several rectangular buildings equipped with solar panels. Cattle can be seen in fenced-in pens between the buildings. Nearby are stacks of hay bales and farm equipment. The farm is surrounded by plowed and grassy fields.

: A rectangular, one-story building with a metal roof and solar panels stands on a lawn. It has a combination of concrete and brick exterior walls, several rectangular windows, and is surrounded by sparse vegetation, including a small tree and a bush. In the background, the sky is overcast.

: Aerial view of a rural complex with several large rectangular buildings and circular structures. The roofs of the buildings are equipped with solar panels. The grounds are surrounded by grassy fields and scattered trees. Paths and roads connect the various parts of the complex.

: Aerial view of solar panels covering two large rectangular barn roofs on a farm. The barns are side by side, with a dirt road and scattered farm equipment between them. The surrounding green fields and paths are partially visible. The panels are arranged in even rows.