ONE OF EUROPES LARGEST SOLAR FAÇADES - MADE OF a2-solar MODULES

a2-solar designs and delivers the solar modules for the new City Hall in Freiburg (Germany) – one of largest solar glass facades in Europe

With a surface of approximately 13.000m², the energetically optimised facade has been designed by the renowned architects of Ingenhoven Architekten and carried out in close cooperation with the metal construction company HW Würfel Metallbau and a2-solar. The façade consists of metal frames aligned towards the sun, for which the solar modules have been specifically customized by a2-solar.

The overall output of 220kWp is generated by a total of 880 solar modules, which a2-solar has manufactured as special seamless double-glass modules with the exceptional dimensions of 3.5m height on 60cm width, weighing almost 100kg each.

The 7mm spacing between the solar cells creates a high transparency for the wood panels installed behind: a design concept elaborated by the Ingenhoven architects to combine highest art of technology with natural building materials. For a2-solar, this project forms again another great success to realize an extra-ordinary synthesis of design and functionality.

Thanks to this innovative solar façade, this new municipal building fulfils all of the EnEV requirements as one of the first public buildings. Thus, this City Hall completely matches with the principal standards of a zero-energy building. The “green building” concept with a 100% energy self-sufficiency, however, was only successfully achieved by using the façade surface in addition to the photovoltaic roof-top system. Also, the Fraunhofer Institut für Solare Energiesysteme (ISE) validates this project for its holistic characteristics of sustainability and integrity.

Due to the ENEV regulations, all buildings and facades are to be equipped with energy-saving components in the future. a2-solar has specialised in how to meet these requirements. Just get in contact with us. It would be our pleasure to answer your technical encounters and to propose you for your solar project our customer-tailored quote which does not only meet your architectural and energetic needs but also with static requirements - true to our slogan: “Never say never, everything is possible”. Make profit of our experience gathered in decades and convince yourself of our wide product range.

Technical Details:

  • Output: 216 KW
  • Customer: HW Würfel Metallbau GmbH & Co. Betriebs KG

Module details:

  • Size: 594mm x 3494mm
  • Technology: Glass-Glass (2 x 5mm)
  • Output: 245 Wp

Building facade made of vertically integrated, semi-transparent solar panels, which are installed on sun-exposed frontiers

Energy concept: Plus energy building with PV modules installed onto the roof and facade.

Further References

18. July 2017

a2-solar participates in the joint R&D project PATOS

24. April 2017

a2-solar donates solar car roof modules to Thuringian schools

a2-solar provides solar car roof modules for Thuringian schools to teach on photovoltaic technology and solar systems in technical college classes. The CEO of a2-solar himself, Mr. Reinhard Wecker (right), handed over the solar modules to the prinicpal Karsten Pohlemann (left) and some of the 2nd year EDP trainees of the Andreas-Gordon-College in Erfurt.
17. December 2016

Solar carport in noble wood craft

This solar carport impresses with maximum performance in an appealing floating design on timber arcades. It fulfils all technical and aesthetic requirements.

a2-solar designs and delivers the solar modules for the new City Hall in Freiburg (Germany) – one of largest solar glass facades in Europe.