Freiburg-based start-up EDENenergy builds stationary storage systems for businesses from used e-scooter batteries. According to Fraunhofer ISE, from which the company spun off, the first 70 kWh system was delivered to a customer in mid-October. It combines 112 used e-scooter batteries. The customer was not named.
Battery Modules Replaced During Operation
The batteries are not disassembled. Instead, power electronics developed by the company connect different batteries and communicate with the various modules. Individual modules can be replaced during operation and are monitored remotely. The company says module replacement will keep the system at 70 kWh after ten years. Batteries at the end of their life go to recycling.
EDENenergy had assumed a state of health of 80% for the used batteries. According to the company, remaining capacity was in some cases well above 90%. It has not disclosed how capacity was measured.
Each Battery Type Requires Adaptation
Connectors, battery management and communication must be adapted for every new battery type. To secure enough identical batteries, EDENenergy initially sources them from fleet operators. In the long term, the company calls for standardized communication protocols and rules for using mobile batteries in stationary storage.
The founders previously worked in Fraunhofer ISE’s power electronics department. EDENenergy plans systems of up to 300 kWh and initially targets mid-sized businesses with solar systems. A state program can fund half the storage costs for pilot customers.
Sources:
https://www.ise.fraunhofer.de/de/presse-und-medien/presseinformationen/2026/start-up-edenenergy-gebrauchte-escooter-akkus-werden-industriespeicher.html
https://www.solarserver.de/2026/11/02/startup-edenenergy-alte-e-scooter-akkus-fuer-neue-industriespeicher
