The World Sustainable Energy Days (WSED) are one of Europe’s largest annual conferences in this field. The 2020 conference will take place from 4 to 6 March in Wels/Austria. The new Clean Energy Package is changing Europe‘s energy markets. “Energy efficiency first” and “global leadership in renewables” are at the core of Europe’s commitment to a clean energy transition. This requires strong policies, competitive businesses, technology innovation and investments. The WSED will adress policies, innovation and business in specialised conferences and interactive events. It connects people from business, the public sector and research and empowers them to embrace the change. The annual conference brings together more than 600 delegates from more than 60 countries from business, public sector and the research community.