What are the World Sustainable Energy Days

Becoming the first climate-neutral continent by 2050 is an ambitious goal which requires ambitious measures. Energy efficiency and renewable energy are at the centre of this roadmap for making the EU‘s economy sustainable.

In 5 days, the event offered delegates 6 dedicated conferences, including the European Energy Efficiency Policy Conference, the European Pellet Conference, the Industrial Energy Efficiency Conference and the Smart E-Mobility Conference.

The response to this "special edition" of the World Sustainable Energy Days was excellent: Over 650 experts from 62 countries participated in the 5 conference days - over 100 of them on-site in Wels!

Conference pictures 2021  Review 2021 (PDF)

Download the programme!


Please keep me informed about the World Sustainable Energy Days!

With the World Sustainable Energy Days, Upper Austria is the meeting place in June for the energy transition. Europe has set itself the ambitious target of becoming the first climate-neutral continent. We present and discuss solutions to practically implement the Green Deal. With highlyefficient and renewable energy systems, we will achieve economic growth, create new jobs and make the energy transition happen!

Markus Achleitner, Regional Minister for Economy and Energy, Upper Austria


Our Speakers

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

More conference pictures​​​​​​​

Our audience - the whole energy transition sector!

A wide range of business actors engaged in the energy transition:

  • technology and equipment companies, energy companies, service providers, planners, developers, financing community etc.
  • the sustainable energy research community
  • representatives from public bodies (e.g. EU institutions, national, regional and local governments, energy agencies)

The World Sustainable Energy Days attract over 600 experts from over 60 countries!​​​​​


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