Connected Energy is investing £2 million in what it says will be the UK’s most advanced second-life EV battery testing facility at Scottow, Norfolk. The 5MWh site will test bus and truck packs from multiple OEMs, proving technical performance, grid services revenue and residual value ahead of larger grid-scale deployments.

A pioneer in second-life EV battery energy storage systems (BESS) is developing the UK’s most advanced testing facility in a major new investment.
Connected Energy is creating the flagship facility as part of its first wholly owned and operated second-life BESS site. As the company continues to secure relationships with automotive manufacturers and EV battery suppliers across Europe, the site will be used to test the integration of batteries from multiple EV bus and truck manufacturers.
Matthew Lumsden, CEO of Connected Energy, said:
“This development marks the next step in Connected Energy’s growth. Having successfully proven the concept of repurposing automotive batteries as energy storage on a commercial scale, we are now moving to owning and operating grid-scale storage sites, with our first site also functioning as an advanced test facility.”
Once electric vehicles (EVs) reach end of life, the batteries can be repurposed in energy storage systems for applications such as supporting renewable energy generation or behind-the-meter income streams. This extends the batteries’ working life and reduces the total cost of ownership by providing a significant residual value for battery packs, creating an additional five to eight years of revenue before eventual recycling.
The new site is at Scottow Enterprise Park in Norfolk, close to the company’s technical centre, and is expected to be operational by mid-2026.
Along with the test facility, Scottow will house a 5MWh BESS. By trading energy and providing grid services, the site will show the suitability of various battery types to generate revenue through energy arbitrage and flexibility services. The site will deploy batteries from various automotive partners beginning with Forsee Power, with more to come as the second-life battery industry develops.
Founded in 2010, Connected Energy has extensive expertise in delivering second life battery energy storage systems, with installations across the UK and Europe.
The company has already delivered proven commercial second-life storage for major partners such as Umicore, Volvo and public sector bodies. Building on this success, Connected Energy is now scaling its business model to include the development, ownership and operation of grid-scale energy storage assets.
“Insights from this multi-battery 5MWh project will shape future, larger deployments,” added Matthew. “Our goal is to optimise what can be achieved with second life batteries. We will gather extensive data such as technical performance metrics, grid stability and revenue generation, which will support a scalable commercial model for large-scale sites as more second-life batteries become available.”
The £2 million project is supported by the Advanced Propulsion Centre UK (APC) as part of a project to enhance EV battery reuse and recycling.
Further Reading on ATF Professional:
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Connected Energy collaborates with Nissan on project to boost EV battery sustainability
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Altilium and Connected Energy collaborate to extend the lifecycle of EV batteries
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The Road Ahead for Recycling EV Batteries
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UK’s first electric vehicle battery circular supply chain completed as pioneering RECOVAS project wraps up


