Large storage facility with electric car batteries being built in Grevesmühlen

29.04.2025

Source: E & M powernews

A 48 MWh large-scale storage facility is being built in Grevesmühlen from new, obsolete electric car batteries. From 2025, it will support the electricity grid.

In Grevesmühlen (Mecklenburg-Western Pomerania), Fenecon and The Mobility House Energy are building a battery storage system with a capacity of 48 MWh. The storage system is based exclusively on new but obsolete traction batteries from electric vehicles. The project follows a similar approach to an existing 8 MWh storage project in North Rhine-Westphalia. Construction preparations at the site are almost complete, The Mobility House Energy announced on April 29. Following completion of the new Edis Netz GmbH substation, the storage facility is scheduled to go into operation in the second half of 2025.

According to the company, Fenecon's container concept enables the standardized integration of different vehicle batteries. This solution is already being used at the sites in Iggensbach in the Lower Bavarian district of Deggendorf and in Greenville (USA). Vehicle batteries that remain unused due to model changes, overproduction or unfulfilled sales plans in the automotive industry are thus put to stationary use.

Experience from the marketing of vehicle batteries

The Mobility House Energy uses its own algorithms to optimize battery operation. The aim is to use the batteries in a grid-friendly and particularly battery-friendly manner in order to minimize ageing effects and extend the service life of the storage units. This approach is intended to contribute to a more cost-effective and stable renewable energy system. Fenecon will be responsible for the operation and maintenance of the storage system. The two companies are thus continuing their existing collaboration.

Fenecon CEO Franz-Josef Feilmeier emphasizes the waste of resources in dealing with e-car batteries: "In Germany, more brand-new and high-quality, but unfortunately obsolete electric vehicle batteries are currently thrown into the shredder every year than batteries are installed as part of large storage systems - which in turn usually come here newly produced from China," he explains. These high-quality batteries could be used in the energy market through such projects.

Marcus Fendt, Managing Director of The Mobility House, also emphasizes that battery storage systems are a central component of the future electricity market. "By using vehicle batteries before, during or after their use in e-cars, we create added value for our energy system and make electromobility cheaper at the same time."

Author: Heidi Roider