Voltalia SA announces the commissioning of the Hallen Battery Energy Storage Scheme (BESS) project, a 32 megawatt /32 megawatthour storage plant, located near the city of Bristol in the Avonmouth region. Located at Avonmouth, near Bristol, Hallen BESS is a lithium-ion battery storage facility comprising 16 modules, each with a capacity of 2 megawatthours per unit. Initially scheduled for the first quarter of 2022, the plant stored and then released its first kilowatthours on December 23, 2021. The Hallen plant will operate in several markets providing frequency management, balancing and other ancillary services on the UK grid, locally and nationally. Voltalia confirms its foothold in the United Kingdom and capitalizes on its expertise in the field of storage, acquired in particular in French Guiana with its Toco complex, the largest battery storage system in operation in France.