1.5 MWp system for Badische Staatsbrauerei Rothaus AG

01/09/2022 Grafenhausen, Germany

Installation information

BUILT: September 2022
LOCATION: Grafenhausen, Germany
BUILDING: Brewery production halls
NOMINAL OUTPUT: 1,5 MWp
NUMBER OF MODULES: 2.719 sodules
INSTALLATION TIME: 8 weeks
USE OF ELECTRICITY: Own consumption
Partner: Badische Staatsbrauerei Rothaus AG and further overall photovoltaic project: KOCO Energy AG

The 9,000 m2 system generates 1.5 MWp for Rothaus, Germany’s highest brewery. The system is spread over several roof surfaces with different roof coverings and properties:

Some areas of the flat roof required a customised special solution consisting of the SingleRail as a composite rail with the BasicRail and the Dome 6.10 Peak for elevating the modules.

The modules were clamped on the long side, which is why this mounting can be described as a kind of "D-Dome 6.10 Classic LS variant".

To K2 Dome 6

On the roof surfaces with trapezoidal sheet metal, the proven BasicRail system was used, which can be installed particularly quickly and allows controlled linear expansion due to the floating bearing.

The substructure is thermally decoupled from the roof cladding - thus the two systems can expand differently and independently of each other and tensions are prevented.

To K2 BasicRail

The 14° pitched bitumen gable roof was again doubled up with welded-in Kerto planks on every second rafter. The K2 BasicRail was screwed onto this with wood screws and sealing washers, and the second layer of K2 SingleRail 50 was then fastened in a cross bond.

Note: The wood screws for fastening the K2 BasicRail should not be longer than the thickness of the Kerto planks.

To K2 SingleRail

On a total of 8 roof surfaces, the solar modules uniformly generate solar power, which the company uses directly for the operation of machines.

It took just 12 months from the start of planning to the realisation of the project. The planning software K2 Base determined the optimal utilisation, provided the static calculation as well as the assembly plan and issued the appropriate article list.

To K2 Base

Climate positivity until 2030

Dr Bayaz, Minister of Finance of Baden-Württemberg, said: “Consistent climate protection makes ecological and economic sense. We can show this as an industrialised country – and thus become a role model for others. Rothaus is going down this path and has the full support of the state.”

Environmental and climate protection are essential components of Rothaus’ corporate philosophy. For several years now, the state brewery has been demonstrating how sustainable management and climate protection work. Now it is taking another step and implementing the first measures on its way to becoming climate-positive.

The 1.5 MWp system of the Badische Staatsbrauerei Rothaus AG was inaugurated on 19 September 2022 by the Prime Minister of Baden-Württemberg, Winfried Kretschmann.

“For this project, thanks to the high level of expertise of our own employees in combination with excellent external specialist companies, we needed just 12 months from planning to realisation. I am sure that we will achieve our goal of becoming climate-positive by 2030,” adds Christian Rasch, sole director of Rothaus AG.

Installation information 1st system
Building: Brewery Hall North
Roof covering: Trapezoidal sheet metal
Roof type: Pitched roof
Roof pitch: 6
Mounting method: In the roof cladding/covering
Nominal power: 103 kWp
Number of modules: 255 modules
Mounting rail: K2 BasicRail 22
Fastener: SpeedClip Z-14.4-603

Installation information 2nd system
Building: Brewery hall south
Roof covering: Trapezoidal sheet metal
Roof type: Monopitch roof
Roof pitch: 6
Mounting method: In the roof cladding/covering
Nominal power: 103 kWp
Number of modules: 256 modules
Mounting rail: K2 BasicRail 22
Fastener: SpeedClip Z-14.4-603

Installation information 3rd system
Building: East car workshop
Roof covering: Bitumen
Roof type: Gable roof
Roof pitch: 15
Mounting method: In roof substructure
Nominal power: 27 kWp
Number of modules: 69 modules
Mounting rail: K2 SingleRail 50
Fastener: SingleHook 3S

Installation information 4th system
Building: West car workshop
Roof covering: Bitumen
Roof type: Gable roof
Roof pitch: 15
Mounting method: In roof substructure
Nominal power: 29 kWp
Number of modules: 72 modules
Mounting rail: K2 SingleRail 50
Fastener: SingleHook 3S

Installation information 5th system
Building: Fermentation cellar (tiled roof)
Roof covering: Tile
Roof type: Gable roof
Roof pitch: 45
Mounting method: In roof substructure
Nominal power: 14 kWp
Number of modules: 36 modules
Mounting rail: K2 SingleRail 36
Fastener: SingleHook 3S

Installation information 6th system
Building: Fermentation cellar (flat roof)
Roof covering: foil and gravel
Roof type: Flat roof
Roof pitch: 1°.
Mounting method: by ballasting
Rated power: 93 kWp
Number of modules: 230 modules
Mounting rail: SingleRail 36 light and BasicRail 22
System: Special construction of the D-Dome 6.10 Classic LS

Installation information 7th system
Building: Multifunctional hall 1+2
Roof covering: Foil and gravel
Roof type: Flat roof
Roof pitch: 1°.
Mounting method: by ballasting
Rated power: 441 kWp
Number of modules: 1,090 modules
Mounting rail: SingleRail 36 light and BasicRail 22
System: Special construction of the D-Dome 6.10 Classic LS

Installation information 8th system
Building: Sorting hall
Roof covering: Foil and gravel
Roof type: Flat roof
Roof pitch: 1°.
Mounting method: by ballasting
Nominal power: 277 kWp
Number of modules: 684 modules
Mounting rail: SingleRail 36 light and BasicRail 22
System: Special design of the D-Dome 6.10 Classic LS