French multinational electric utility Engie has deployed a 150 kW/90 kWh E-STOR system, developed by British energy storage technology developer, Connected Energy, at a site in Rotterdam, Holland.
Connected Energy’s E-STOR energy storage system – which is powered entirely by second-life batteries from Renault electric vehicles – has been installed on a section of the TenneT distribution network.
The Rotterdam project is the first part of a three-stage project by Engie and Connected Energy. This first step is a seen as ‘proof of concept’; designed to demonstrate the technical and economic viability of using E-STOR second-life battery systems for frequency response services.
The results are extremely positive: E-STOR has been proven to integrate seamlessly into Engie’s flexibility pool of industrial assets – and has already generated its grid balancing revenues.
In a wider context, the project is part of the Re-Use Re-Power initiative at Engie.
Phase 2 and Phase 3 will see Engie and Connected Energy deploy much larger E-STOR systems at other sites in Northern Europe for grid balancing services.
At a technical level, this deployment at Rotterdam is also significant: the E-STOR utilises a new system architecture which enables second-life electric vehicle (EV) batteries to be operated in series – thereby increasing power and capacity whilst also reducing cost.
A control room has also been built where the operations of the system can be demonstrated.
Commenting on the project, Connected Energy’s CEO Matthew Lumsden said:
“We are delighted with the positive results and feedback from the first stage of this exciting journey with Engie. Our second-life E-STOR battery containers have been proven to deliver on a technical and economic level: they should provide a guaranteed 10 year service in the frequency market with a substantial cost benefit versus new batteries. This is just the start of sequence of much bigger system roll-outs – 2019 is looking extremely promising indeed.”
Marcel Didden, project manager of the Re-use and Re-Power project or Arie Kleijn Hesselink, project manager of the Rotterdam project: “Using second life car batteries is known to have technology challenges due to the different ageing history of the batteries. As this Rotterdam unit has been approved by the Dutch TSO to provide frequency reserve, Connected Energy has proven to manage these complexities.”