What are the World Sustainable Energy Days

2023: Energy Transition = Energy security!

The price crisis, multiplying signs of climate change, and threats to energy security urge us to act like never before. REPowerEU reflects this urgency and provides new momentum for the energy transition.

In 2023, the World Sustainable Energy Days showed the critical role of the energy transition in securing our clean energy future and concrete policies, technologies and markets to get us there. The annual conference is a leading event on the energy transition and climate neutrality with over 650 participants from over 60 countries.


Conference pictures 2023  Review 2023 (PDF)


International Clean Energy Challenge

​​​​​​​​​​​​​​An event for young professionals
24 - 28 July 2023, Upper Austria


With the World Sustainable Energy Days, Upper Austria – a leader in the energy transition – is the meeting place for sustainable energy.

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 highly-efficient 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

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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:

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 650 experts from over 60 countries!​​​​​


What do we offer? 

Conference Review: These were the ...

WSED 2023​​​​​

WSED 2022​​​​​


Tradeshow "WeBuild - Energiesparmesse"

​​​​​​​Leading tradeshow on renewable energy and energy efficiency
1 - 5 March 2023




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