In October, a containerized second-life battery system was installed in Borås with Comsys control technology at its core. Our platform provides the stability and reliability needed for second-life batteries to operate as part of the power system, ensuring they deliver real value.
The system was delivered by Rebaba, a Swedish company focused on circular energy solutions, in collaboration with El och Marinteknik, which handled the rebuilding and integration of the reused batteries. By taking electric vehicle batteries that are no longer in use and rebuilding them into storage modules, the project extends the lifetime of existing resources and avoids unnecessary waste.
With Comsys technology integrated, the system can connect to the grid and provide the rapid response required for frequency balancing. By supplying or absorbing power in real time, it supports the Nordic requirement of maintaining a stable 50 Hz frequency.
This installation shows how second-life batteries can be developed into reliable energy assets, and how Comsys control makes them a working part of the grid.
“The project proves that it’s possible to build a fully Swedish, scalable battery energy storage system using second-life car batteries – without the involvement of the original car manufacturer.”