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SmartEnCity Site Sonderborg


Project status



Sonderborg is a Danish municipality with 76 000 citizens committed to becoming a zero-carbon community by 2029, an objective pledged in the ProjectZero visionary project with a focus on sustainable growth and creating new green jobs. Energy efficiency and energy from the area’s own renewable sources are the key means to turn the vision into reality. New thinking is essential and public policy and investments fuel this transition.

The activities of the SmartEnCity project are an important contribution to reaching Sonderborg’s goal of CO2 neutrality. Based on a baseline assessment of the current situation and an active involvement of citizens in all interventions, the project will implement renovations of multi-storey buildings, planning of coastal wind farms, heat pumps, electric cars and intelligent charging stations for electric cars.

Demo Site Expected Impact

* Detailed information regarding the technical and financial performance will be available at a later stage.

With the SmartEnCity project, Sonderborg seeks to:

  • demonstrate ambitious electrification of Sonderborg’s Roadmap 2020, through rooftop photovoltaic power production;
  • green mobility solutions including biomethane buses and EV charging infrastructure;
  • retrofitting existing buildings of three housing associations in close cooperation with tenants;
  • engage the citizens as co-designers of the Smart Zero Carbon Sonderborg’s ambition to implement integrated solutions with comprehensive learning and introduce new ICT-based energy information.


Buildings and energy

* Detailed information regarding the technical and financial performance will be available at a later stage.

The solutions demonstrated in Sonderborg include:

Energy efficiency in buildings

  • Retrofitting the building envelope
    • Altogether 45 multi-storey buildings (a total of 880 apartments with approximately 66 000 m2 floor space) will be renovated

Energy systems integration

  • Photovoltaics
  • Thermal collectors
    • Solar thermal collectors will be installed on the buildings’ rooftops


Mobility & Transport

  • Clean fuels and fueling infrastructure through soon-to-be locally produced biomethane
  • Clean vehicles
    • Smart electric vehicle-charging stations will be installed, and city bus fleets will be extended by bio methane buse


  • ICT as planning support
    • A new ICT system will be introduced, which will collect and analyse data


Kristina Bozhkova
Project Zero