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We fight for the energy transition and a sustainable, environmentally friendly and socially just economy based on 100% renewable energies. Be part of the energy transition and support us with your membership.

...in the rapidly growing field of energy storage technologies

Bonn 18.03.2021. Experts from all over the world came together online for EUROSOLAR's fully digital International Renewable Energy Storage Conference.

Three days focused on innovative battery technology, thermal and RenPower2X energy systems in over 70 lectures, 10 sessions, a German language lecture series and a digital poster exhibition with live presentations. Hundreds of participants took part to present research, share knowledge, and advance the transition to renewable energy.

In his welcoming address, Prof. Peter Droege, President of EUROSOLAR e.V., expressed his delight in the progress of energy storage: “The IRES conference is the world’s largest scientific renewable energy storage conference. Now in its 15th year, the IRES focuses on the central role energy storage systems play in a distributed, locally useful and 100% renewable energy based economy. Regulatory, financial and political simplification steps await, to open the markets to a renewables storage revolution.” Prof. Dr. Hans-Martin Henning, Chairman of the IRES Scientific Committee, Director of the Fraunhofer Institute for Solar Energy Systems ISE and Member of the German Government's Independent Council of Experts on Climate Change, remarked on the topic of climate, political frameworks and markets: “Renewable energies will dominate our future energy system. With high proportions of volatile provision, measures to increase flexibility become central for a secure supply and stable operation. All types of energy storage are therefore becoming key components on the way to a climate-neutral, renewable energy system.“

Dr. Peter Schossig, Fraunhofer ISE and member of the IRES Scientific Committee, added, “In particular, the urgently needed transformation of our industrial processes towards CO2 neutral production needs further research. To increase the share of renewable sources, we will need heat storages on different temperature levels and large power ranges. Additionally, the integration of hydrogen will allow CO2 neutral production of concrete and steel.”

The German-language lecture series on 18 March was led by the renowned EnergyAgency.NRW and discussed current topics such as the Green Deal, the Renewable Energy Sources Act (EEG) and the future and redesign of opencast mines in Germany. Managing Director Lothar Schneider, opened the series: “Storage systems are an important component in the energy transition. Therefore it is very important that we can welcome experts on the topics of electricity and heat storage at IRES this year again. Especially at the heat storage, there is still a lot of potential for improvement and the possible applications are diverse. These must be developed and used so that Germany can achieve the goals set by the European Union's Green Deal. And the challenge is: how can we make storage technology widely usable on an industrial scale?”

In his closing statement, Prof. Dr. Ingo Stadler, TH Köln, called for action: „If not now, when? If we approach the big crisis (climate) with anywhere near the same courage we approached the small crisis (Covid), we can do it! We need to stop not only talking about transformation, but also taking action. The technological solutions are ready, now we finally need a regulatory framework that takes respect to the implementation of energy storage solutions and sector coupling.”

This year's IRES conference provided an overview of the latest research and cutting-edge technology in the fast-growing fields of today's energy storage technologies. The digital conference was organized by EUROSOLAR e.V. in cooperation with EnergyAgency.NRW, Messe Düsseldorf and the German Energy Storage Association (BVES). IRES 2021 is over, but you can find out more online – www.energystorageconference.org – especially about the 2022 event, our Open Access Proceedings publication and the new Call for Abstracts. If you would like to attend #IRES2022, please contact EUROSOLAR at +49(0)228 2891 446 or This email address is being protected from spambots. You need JavaScript enabled to view it..


16 March - 18 March 2021

IRES conference

Global online event

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Autumn 2021

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