What are the World Sustainable Energy Days

In 2021, the conference - which attracts over 600 participants from over 60 countries each year - shows how we can make a green recovery happen in practice and how the energy transition can contribute as an investment engine to this deep transformation

Europe has the ambitious goal of becoming the first climate neutral continent by 2050. The Green Deal and the EU Climate Law are first concrete steps. The current economic challenges are also an opportunity to accelerate decarbonisation and to create a fairer society and a more competitive economy



Interested in attending? Download the First Announcements!
​​​​​​​NEW DATE: 21 - 25 June


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Our Speakers

More than 100 experts share their work, projects, research results, achievements, ideas and insights with the worldwide sustainable energy community:

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Our audience: the entire energy transition world!

  • business actors engaged in the energy transition:technology and equipment companies, energycompanies, service providers, planners, developers, financing community etc.
  • the energy research community
  • public body representatives (e.g. EU institutions, national, regional and local governments, energy agencies)
  • over 600 experts from more than 60 countries each year!

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What do we offer? 

Conference Review: These were the ...

WSED 2020​​​​​​​

WSED 2019​​​​​


Tradeshow "WeBuild - Energiesparmesse"

​​​​​​​Leading tradeshow on renewable energy and energy efficiency
​​​​​​​The Energiesparmesse 2021 was cancelled.
Next exhibition: 2 - 6 March 2022




The conference organiser: OÖ Energiesparverband

​​​​​​​The OÖ Energiesparverband (ESV) is the energy agency of Upper Austria. The agency, which was established by the regional government, drives the energy transition by promoting energy efficiency, renewable energy and innovative energy technologies. It provides comprehensive services to private households, businesses of all sizes and municipalities. It also supports energy technology companies in the context of the Cleantech-Cluster.




Energy Leaders from Upper Austria

A spotlight on the energy transition​​​​​​​
Successful projects and programmes that contribute to Upper Austria's leading role in the energy transition