World Sustainable Energy Days 2021


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.

Hybrid Event:

  • Online participation from anywhere in the world
  • On-site participation: following COVID rules in place at the time of the event. On-site conference days in Wels/Austria were 22 - 24 June.

Who attended the event?

  • A wide range of business actors engaged in the energy transition: technology and equipment companies, energy companies, service providers, planners, developers, financing sector etc.
  • the sustainable energy research community
  • representatives from public bodies (e.g. EU institutions, national, regional and local governments, energy agencies)

Over 600 experts each year from more than 60 countries!

When did it take place?

21 – 25 June 2021

Where did it happen?

Wels/Austria. The region of Upper Austria is an ideal location for this conference: Through significant increases in energy efficiency and renewable energy, greenhouse gas emissions from buildings have been reduced by 39 % in 10 years. Over 60 % of all space heating and 31 % of the primary energy in Upper Austria already come from renewables.

​​​​​​​Energy transition ↔ Green recovery

Programme overview 2021

Find out more!

European Pellet Conference, 22 June

With more than 450 participants from over 50 countries each year, it is the largest annual pellet event worldwide. In just 1 day, the event offered delegates a full package:

  • a leading international conference
  • meeting opportunities for pellet actors along the value chain


European Energy Efficiency Conference, 23 - 25 June

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. In 2021, the conference - which attracts over 400 participants from over 50 countries each year - shows how we can make a green recovery happen in practice and how energy efficiency as an investment engine can contribute to this deep transformation.


Young Biomass Researchers Conference, 21 June, morning
Young Energy Efficiency Researchers Conference
, 21 June, afternoon

  • 2 conferences presenting the work and achievements of young researchers
  • Awards "Best Young Energy Efficiency Researcher" and "Best Young Biomass Researcher"


Energy Efficiency Policy Conference, 23 June

Green Deal · Policy update · Green Recovery · Markets · Energy Efficiency Watch


Innovation Workshops, 25 June

Green Finance · Buildings · Technologies
New research results on finance, buildings and technology innovation


Industrial Energy Efficiency Conference, 23 June

Accelerating decarbonisation: Innovation · Green Deal · Best Practices


Smart E-Mobility Conference, 24 June

E-mobility is on the rise worldwide. The conference gave an update on technological developments and on new economic possibilities.
Market overview Building integration · Energy management · Storage and charging solutions · Best practice examples