The E-STOR technology, which was developed in cooperation between Group Renault and british electric commany Connected Energy, uses second-life batteries from Renault electric vehicles. E-STOR charges batteries at a low power and releases stored energy at high power. That way it offers fast charging in places, which could not be connected to high power electric grid or the connection would be simply to expensive.

Sistem uses used batteries from electric cars. Electric batteries in the cars usually have the lifespan of eight to ten years, but even then they usually keep enough capacity for further use in stationary applications, which can extend their life for several years. Beside fast charging stations, they can also find use in home appliances, industrial sites and in many other places with needs to store electric energy.

"We are developing a range of E-STOR systems, some, like the two installed in Belgium and Germany are designed specifically to enable lower cost more sustainable electric vehicle charging so it's very great to see these in action," commented the station opening of charging stations Matthew Lumsden, Managing Director of Connected Energy.