The conference brief
Upcoming editionWorld Sustainable Energy Days 2027
World Sustainable Energy Days is an annual multi-conference at Stadthalle Wels in Austria, organized by the Upper Austria Energy Agency (OO Energiesparverband). It bundles seven co-located conferences on energy efficiency, industrial decarbonization, e-mobility, pellets, and policy alongside a tradeshow. It draws European industrial energy buyers and policymakers into one venue across four days rather than a single-topic show.
- Energy efficiency
- Renewables & energy
- Cross-sustainability
- Conference dates
- March 2–5, 2027
- Location
- Wels, Austria
- Venue not confirmed in our research
- Ticket guide
- Under $500
- See pass types and eligibility
- Format
- In person
- Organized by Upper Austria Energy Agency (OO Energiesparverband)
01 / Make the call
Is this the right room?
Emitree's assessment of audience fit. Conference access does not establish buying intent or guarantee meetings.
Consider it if
You sell energy efficiency, industrial decarbonization, e-mobility fleet electrification, or biomass and pellet technology into European industrial and municipal buyers. The Industrial Energy Transition Conference (4 March) runs concurrently with the European Energy Efficiency Conference (3-5 March), but needs its own 130-euro pass.
Consider another event if
Your offer is voluntary carbon credits, corporate PPAs or RECs, or ESG software. The published program does not surface carbon markets or renewable power procurement as a track.
02 / Understand the audience
Who attends
The organizer describes the audience as business actors in the energy transition (energy companies, technology vendors, equipment suppliers, service providers, project developers, financing professionals), researchers and academics, and public-sector representatives from EU institutions and national, regional, and local governments. The organizer states over 650 participants from more than 60 countries attend annually, though this is a general recurring claim rather than a figure tied to a specific past edition.
How large is the event?
The organizer states over 650 participants from more than 60 countries as a standing annual figure rather than a count tied to any one edition. The reviews page links per-edition conference review PDFs for 2024, 2025, and 2026 for anyone who wants a specific year's numbers.
Companies and organizations
A sample of organizations featured by the organizer, including attendees, sponsors, exhibitors, partners and speakers. Each group shows its published role and edition.
Speaker organizations
2026- eta Energieberatung
- International Energy Agency
- hofmann & neffe
- Ea Energy Analyses
- Forest Trends
Find the people who fit your offer.
We research the World Sustainable Energy Days attendee list, qualify the accounts against what you sell and run the outreach for your team.
Book a call to discuss your conference list.
03 / Check your access
Tickets and eligibility
Fees are published in euros with 10% VAT added and no early-bird deadline. An all-conferences pass covering 2 to 5 March 2027 is 430 euros. Single-conference passes range from 70 to 385 euros. At 70 euros each are the Energy Efficiency Policy Conference (4 March), the Workshop One-Stop Shops (3 March), and the Young Energy Researchers Conference (2 March), all one day. The European Energy Efficiency Conference (3 to 5 March) is 385 euros, the European Pellet Conference (3 March) is 250 euros, and the Industrial Energy Transition Conference (4 March) and Smart E-Mobility Conference (5 March) are 130 euros each. Student rates run from 35 euros for the one-day conferences to 65 euros for the Pellet and Energy Efficiency conferences and 125 euros for the all-conferences pass. All fees include an entrance ticket to the tradeshow and conference documentation. The site does not publish a standalone tradeshow admission price.
Rates and eligibility can change. Confirm the current price, tax treatment and included sessions with the organizer.
Check registration with the organizer ↗04 / Plan the details
Before you book
Seven sub-conferences run in overlapping one-day and multi-day windows between 2 and 5 March at Stadthalle Wels, and a single-conference pass does not grant access to the others, so check the per-conference schedule before booking travel. The tradeshow runs 3 to 7 March, extending past the end of the conference program.
- Venue
- Not confirmed in our research
- Organizer
- Upper Austria Energy Agency (OO Energiesparverband)
The practical questions
Before you decide
Is World Sustainable Energy Days 2027 still upcoming?
This edition is listed for March 2–5, 2027. Check the organizer's page for changes before booking.
Where can I find the World Sustainable Energy Days exhibitor list?
We have not linked a public exhibitor directory for this edition. Ask the organizer about current directories and attendee access.
Does a company listing confirm who will attend?
A sponsor, exhibitor or speaker listing establishes that published role. It does not establish which employees will attend or whether they are buying. Previous-edition examples remain historical.
How can Emitree help with World Sustainable Energy Days?
We research relevant accounts using public conference sources and any lists you provide. We qualify the accounts against your offer, run agreed outreach and record replies and meetings in your CRM.
The research behind this page
Sources and checks
Original research: . Later checks cover the subjects named beside each source.
Organizer figures retain their stated edition and basis. Emitree's audience-fit guidance is an assessment of the published information.
Your next conversation starts here
Know who is worth meeting.
Tell us what you sell and who you need to reach at World Sustainable Energy Days. We research the accounts, qualify the fit and run the outreach.
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