ReStoreBESS

Challenge

The green transition is placing new demands on the energy system. More renewable energy leads to greater fluctuations in production and grid load, while the need for energy resilience is increasing across the commercial and industrial sector. For supermarkets, this challenge is particularly clear, as they often combine high energy consumption, local solar generation, and critical functions such as refrigeration and freezing that cannot tolerate power interruptions. At the same time, many EV batteries are discarded from mobility use even though they still retain significant capacity and value.

Solution

ReStoreBESS develops and demonstrates a scalable battery energy storage system based on second-life EV batteries. In the project, used batteries are repurposed into a stationary energy solution that can store electricity, support daily supermarket operations, and provide backup power during outages. The solution combines intelligent energy management, local use of solar power, market participation, and backup functionality in one integrated platform. The system will be demonstrated in a Salling Group supermarket, where it will help keep critical functions running while also supporting the electricity grid when needed.

Impact

The project will demonstrate a fully operational, grid-forming battery energy storage solution based on second-life EV batteries that can strengthen energy resilience in commercial buildings while creating value through intelligent energy management, integration of local solar generation, and participation in energy markets.

The solution will document safe and long-term operation through an open-compatible battery management system and real-time optimisation based on the batteries’ state of health. At the same time, the project points to an energy-efficient pathway for storage, with a round-trip efficiency of 97–98%, while delivering an immediate green benefit by extending the lifetime of existing batteries in a circular value chain.