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Second-use large-scale storage in Lünen extends battery lifecycles and stabilizes the grid

Large-scale storage Lünen

The large-scale storage system realized in Lünen uses second-use batteries from electric vehicles and combines economic efficiency with genuine circular economy. Our control and market access ensure minimal degradation at maximum yield.

    Vision: Integrate vehicle batteries into the energy market as scalable storage assets
    Location: Lünen (on the premises of REMONDIS SE)
    Project size: : Large-scale storage with 13 MWh capacity
    Comissioning: : 2016
The project

From fluctuation to flexibility: second-use at scale

In 2015, the world’s then largest second-use battery storage system is created in Lünen. In total, around 1,000 battery systems from smart fortwo electric drive vehicles are bundled into a stationary storage unit. The goal: balance fluctuations from variable renewables and provide primary control reserve—fully automated, safe, and economical.

Our solution

Intelligent control, gentle operation, predictable revenues

Together with GETEC, The Mobility House Energy handles the control integration, operation, and marketing of the storage system on the energy markets. Our specially developed algorithms operate the storage in a battery-friendly and grid-supportive way: charging and discharging processes are optimized to minimize degradation and maximize revenues from balancing services and spot markets.
The seamless integration of different battery packs lays the foundation for scalable, future-proof operations.

Results

Double value creation: longer lifetimes, better CO₂ balance

  • World’s largest second-use storage of its time: 13 MWh capacity from approx. 1,000 EV battery systems
  • Real-time grid stability: Prequalified for primary control reserve; retrieval, storage, and feed-in are fully automated
  • Circular economy in practice: Significantly extended battery life in stationary use - economical operation for many additional years
  • Economics & sustainability combined: Double value creation from batteries; improved environmental footprint without energy-intensive new production
  • Industry partnership across the chain: From production/refurbishment (ACCUMOTIVE) to operation & marketing (The Mobility House Energy/GETEC) and recycling (REMONDIS)
Our services

Glossary:

  • Second-use / 2nd-use: Continued use of used or decommissioned vehicle batteries in stationary applications
  • Primary control reserve (FCR): Seconds-reserve for maintaining grid frequency
  • Battery-friendly operation: Algorithms that optimize charge windows, C-rates, and temperature management to minimize degradation
  • Circular economy: Extended lifecycle including end-of-life recycling and recovery of valuable raw material