Construction of the largest flow battery: stability for Europe!

Construction of the largest flow battery: stability for Europe!

Laufenburg, Schweiz - The construction of the world's largest flow battery has officially started. This was announced today, June 19, 2025, by the non -profit association Flow Batteries Europe (FBE). The project, which is considered to be the key initiative to stabilize the European power grid, is realized in the newly founded technology center Flexbase in Laufenburg, near Basel. This is a unique location where 41 border lines of Germany, France and Switzerland meet.

The planned capacity of the Redox Flow battery is 800 megawatts and 1.6 gigawatt hours. This innovative technology enables energy to store energy for hours or even days, which contributes decisively to stabilize the current flows across national borders. Marcel Aumer, Group CEO from VRP and co -founder of the FlexBase Group, said: "Nobody ever did it before." Another important aspect is that the battery should compensate for weather -related bottlenecks and also supplies an adjacent data center with energy.

central goals of the

The main goal of the FlexBase initiative is the stabilization of the European power grid, especially in view of the growing share of renewable energies in electricity production, which has already reached almost 50 percent in the EU. The need for large electricity stores is becoming more and more urgent to compensate for the fluctuations in performance in renewable energies. The FlexBase battery will be able to deliver 500 megawatts over more than two hours and at the same time to expand the storage capacity by using Redox Flow Agregates.

The technology used, in which energy is stored in two liquid electrolytes, offers advantages such as a long service life, low fire and flexibility, to increase the storage capacity by enlarging the tanks. A total of 960 tanks with a total of 260 million liters of electrolyte fluid are planned, with the building dimensions being 240 meters in length, 80 meters in width and 30 meters in height.
The final decision on the technology is to be made in 2027, while the battery is intended for 2028.

The importance of new battery technologies

In the meantime, global research is being worked on more powerful batteries. In particular, all areas of electricity production and storage are affected. The use of hydrogen drives and various battery solutions is the focus of the energy and mobility transition. In Germany, researchers at the postlithium research cluster in Ulm, Karlsruhe and Gießen work on alternative battery materials, including the promising sodium ion battery, which could almost achieve the performance of lithium-ion batteries, but without the use of critical raw materials.

Maximilian Fichtner, spokesman for the laboratory in Ulm, emphasizes the need for a broader material base and the importance of a holistic political approach to support research and development in battery technology. The technological development is considered the key to ensuring the energy density, which will be crucial for future mobility and energy supply.

Overall, the construction of the largest Redox flow battery in Europe is a significant step towards a more stable and sustainable energy future and shows the further development of modern storage technologies on a responsible basis.

For further information on the project, please visit Öconews, Research and Knowledge and and Tagesschau.