BW ESS Breaks Ground at Berkswell as UK Battery Storage Pipeline Widens
The 200MW West Midlands construction start came alongside acquisitions and fresh financing, but a planning refusal illustrates the delivery risks facing the 2030 target.
BW ESS broke ground on its 200MW Berkswell battery energy storage project in the West Midlands during the week of September 7 (2026-09-07), one of several UK battery milestones in that period as developers pushed construction, acquisitions and financing activity across an expanding project list while the industry's distance from the government's storage targets remained substantial.5
The UK government's Clean Power 2030 Action Plan targets between 22GW and 27GW of short-duration battery storage by the end of this decade — a range requiring sustained construction well beyond what any single 200MW project delivers. Berkswell is a step forward, not a solution.1
The same week, Eelpower Energy acquired the Winchester Silkstead battery storage project from Balanced Grid Works, adding to a run of secondary-market transactions in which UK storage assets still in development have changed hands as the sector has expanded rapidly through 2026.5
Berkswell's scale looks modest against what is now in construction or late development elsewhere. Fidra Energy, backed by EIG and the National Wealth Fund, is building a 1.4GW/3.1GWh project at Thorpe Marsh in Yorkshire and proposing a further 500MW/1.1GWh at West Burton in Nottinghamshire. Projects at that scale would add a significant increment to UK installed storage capacity in a single commissioning.1
In June (2026-06-04), Fidra also acquired the Enderby project in Leicestershire from Innova, a site expected to reach up to 1.025GW of capacity when operational, placing it among the largest battery projects in the country. Innova's chief finance and investment officer Daniel Mushin said the transaction was the company's third utility-scale transmission-connected battery storage sale in twelve months.1
Abu Dhabi's Masdar began commercial operations at a 35MW BESS in Rochdale on August 24 (2026-08-24), its second UK project commissioned toward a stated target of 3GWh of storage capacity across the country, Rigzone reported. Masdar's 3GWh ambition represents a small fraction of what the Clean Power plan requires from the sector as a whole.4
Financing has not been the obstacle. Santander committed £42.7m to the Immingham BESS project, Energy Voice reported on August 12 (2026-08-12), one of several commercial bank transactions backing UK storage development as deal activity across the sector continued through the summer.3
Planning remains the less predictable variable. A West Lane BESS proposed for County Durham was refused despite the local planning committee actively backing the site. Rewe 8, the developer, told the planning meeting that battery storage systems played a crucial role in decarbonising the national grid. The committee's support did not carry the final decision.3
NatPower and Tesla signed a multi-year supply and execution agreement in June (2026-06-24) to deploy more than 25GWh of BESS across Italy and the United Kingdom, with the facilities to be owned and operated by NatPower, according to Rigzone. The UK-specific allocation within that agreement has not been publicly disclosed.2
The volume of activity since the summer — groundbreakings, acquisitions, fresh financing and planning decisions both positive and negative — reflects a sector building broadly but still well short of the 22-27GW target.1 Fidra's Thorpe Marsh at 1.4GW and Enderby at up to 1.025GW represent close to 2.5GW of potential capacity, but both face grid connection queues and construction timelines that have stretched delivery schedules on earlier UK storage projects. Their commissioning dates carry more weight for the 2030 target than the steady accumulation of smaller groundbreakings like Berkswell.1