They're charged using electricity from the power grid during periods of low demand or extra capacity. And when the demand increases, such as during a grid disturbance or power outage, the electricity is discharged back into the grid for immediate use. Grid energy storage, also known as large-scale energy storage, is a set of technologies connected to the electrical power grid that store energy for later use. Storage technologies include pumped hydroelectric stations, compressed air energy storage and batteries, each offering different. SSE's 50-MW/100-MWh battery energy storage system (BESS) at Salisbury in Wiltshire, England entered commercial operation in April 2024. The company has said battery storage “will play an increasingly important role in our energy mix.
