UK’s ‘largest battery’ commissioned by investor Hazel Capital

August 1, 2017
LinkedIn
Twitter
Reddit
Facebook
Email
The 15MW Lockleaze project follows the completion of Hazel Capital’s Staunch project (pictured) earlier this year. Image: Hazel Capital.

What is claimed to be the UK’s largest stand-alone battery storage facility has been successfully commissioned by Hazel Capital as the investor continues to build its energy storage project portfolio.

The 15MW Lockleaze project in Bristol, in the West of England, received planning consent at the beginning of May before construction, grid connection and energisation followed in under 10 weeks.

The project marks the second to be completed as a result of Hazel Capital’s partnership with its affiliate, Noriker Power, after the commissioning of a 20MW hybrid battery/engine project in Newcastle-under-Lyme in March 2017, called Staunch.

Hazel Capital would not reveal who supplied the batteries for the project unlike Staunch, which the company told our UK site Solar Power Portal back in January was using 40 LG Chem batteries. Like Staunch, the project has also won a firm frequency response (FFR) contract through last month’s National Grid tender however Hazel declined to explain the rest of the project’s revenue stack.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Both Lockleaze and Staunch were developed by Aura Power and will provide frequency response services to National Grid as Hazel Capital looks to build its aggregation capabilities over the course of the year. By the end of 2017, the clean energy-focused investment manager is targeting 100MW of (export) capacity by the end of 2017.

Simon Coulson, director of Aura Power, said: “We are delighted that the Lockleaze project has been delivered to market in such a short period of time. This project is of particular importance to us, being located close to our head office in Bristol, and it received strong support from the local community. We look forward to delivering many more storage projects through our UK pipeline.”

The Lockleaze project is not likely to remain the largest standalone battery for long, with UK-headquartered energy and energy services provider Centrica confirming today in its H1 2017 results that construction on its 49MW Roosecote project is underway.

13 October 2026
London, UK
Now in its second edition, the Summit provides a dedicated platform for UK & Ireland’s BESS community to share practical insights on performance, degradation, safety, market design and optimisation strategies. As storage deployment accelerates towards 2030 targets, attendees gain the tools needed to enhance returns and operate resilient, efficient assets.

Read Next

March 24, 2026
Envision Energy’s director of energy storage solutions, Michael Koller, speaks with Energy-Storage.news at Energy Storage Summit 2026 in London, UK.
March 23, 2026
Thimo Mueller, general manager of commercial at ASL, has urged that a ‘culture of collaboration’ will be key to New South Wales (NSW) achieving its energy storage targets.
March 23, 2026
Eku Energy and Valent Energy have recorded separate milestones in their respective expansions of battery energy storage systems (BESS) in Australia.
March 19, 2026
UK battery storage projects won a combined 1.8GW of capacity market (CM) obligations across the T-1 and T-4 auctions.
March 13, 2026
Australia’s MGA Thermal has secured AU$17 million (US$12 million) in new investment for its long-duration thermal energy storage technology as it enters the commercial scale-up phase.