A 48 MWh container-based large-scale storage system made from new vehicle batteries in Grevesmühlen combines economic efficiency with resource-conserving circular economy. Our commercialization experience and self-developed algorithms, maximizes profitability.
Large-scale storage with unused batteries in Grevesmühlen
An innovative battery storage facility with a storage capacity of 48 megawatt hours (MWh) is being built in Grevesmühlen (Mecklenburg-Western Pomerania). The project relies on new, unused electric car batteries – fully functional drive batteries from automotive production that are no longer used in vehicles but can still be used for stationary applications for many years to come. This solution makes an important contribution to the energy transition and the sustainable use of resources. Commissioning is planned for the second half of 2025, once the adjacent substation has been expanded.
Intelligent marketing and grid-friendly integration
The Mobility House Energy is responsible for the control integration and commercialization of the large-scale storage system via our proprietary energy platform. Our goal is to optimize the storage’s economic operation while simultaneously contributing positively to grid stability through so-called grid services, such as frequency regulation in the power grid.
Our approach leverages specially developed algorithms that minimize battery cell aging, ensuring the longest possible service life. At the same time, our system enables automated trading on the electricity market, allowing excess renewable energy to be stored and strategically fed back into the grid.
Sustainable, economical, and scalable
- 48 MWh storage capacity: Enough energy to supply around 8,000 households for one day
- Use of hundreds of second-life battery packs – no new production necessary, full recycling of valuable raw materials such as lithium and cobalt
- Planned 15-year service life as large-scale storage – significantly longer battery life beyond vehicle operation
- Fully grid-connected operation, i.e., the storage system actively contributes to the stability and flexibility of the energy system – for example, through balancing energy
- Modular container design from Fenecon enables efficient installation and maintenance as well as high scalability for future projects
This project demonstrates how economical storage solutions with a focus on sustainability can be implemented in practice – a significant step toward a climate-neutral energy and mobility future.
Glossary of Terms
- Decommissioned vehicle batteries: New batteries from electric vehicle production that are no longer used in vehicles (e.g., due to model changes) but remain technically sound.
- Container concept: A modular, kit-like system for integrating different battery types into a common stationary storage solution.
- Round-trip efficiency: A measure of energy losses during charging and discharging of a storage system — the higher the efficiency, the lower the losses.
- Grid service capability: The contribution of a storage system to stabilizing the power grid, for example by absorbing excess electricity or providing balancing energy.