– presentations of the symposium will be published soon –

In 2025, we proudly celebrated the 50th anniversary of the IEA Energy Storage Technology Collaboration Programme — a milestone that marks half a century of international collaboration in energy storage research, development and deployment.  What began in 1975 as the Implementing Agreement on Energy Conservation through Energy Storage has grown into a global network driving innovation and impact.

To honour this journey and look ahead to the future, a one-day symposium dedicated to “50 Years of Energy Storage RD&D: Achievements and the Way Forward.” took place in Rotterdam on 13 November 2025. The symposium gave with an overview of the past, present and future developments in storage technologies and highlighted how the various sectors can benefit from deploying energy storages to create urgently needed flexibility.