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Hams Hall BESS enters operation as Europe’s largest by storage capacity
10/11/2026
News
Energy storage operator BW ESS has announced the start of commercial operations at the first phase of its Hams Hall battery energy storage system (BESS) in the West Midlands.
Located next to the Hams Hall substation in North Warwickshire, the project adds 350MW/1,243MWh of storage capacity to the UK electricity system. BW ESS said it is the largest BESS in Europe by storage capacity.
A second phase is expected to increase the site’s capacity to 400MW/1,424MWh. Once completed, BW ESS said the site will be capable of supplying electricity to around 1.3 million homes for up to 3.5 hours.
Project revenues are supported by a 10-year floor and optimisation agreement with EDF. Financing was secured from OCBC, Rabobank and Societe Generale.
Hams Hall forms part of BW ESS’s 2.6GWh Ardenham portfolio, co-owned with AIP Management. BW ESS also operates the 331MWh Bramley BESS in Hampshire.
