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Where is the largest battery energy storage system in the UK?

The 100 MW/331 MWh battery energy storage system in Bramley, Hampshire, is the largest to be brought into commercial operation in the UK to date Photo: BW ESS BW ESS and Sungrow have begun commercial operations at the 100 MW/331 MWh battery energy storage system (BESS) in Bramley, Hampshire, the largest to be brought online in the UK to date.

How big is battery storage in the UK?

That's according to the latest data from Solar Media Market Research's ' Battery Storage: UK Pipeline & Completed Assets Database' report. A total of 120MW/140MWh of grid-scale battery energy storage system (BESS) capacity came online in January 2025, bringing the UK's total operational capacity to around 6GW/8.3GWh.

What happened to battery storage assets trading in Great Britain?

The deal followed a period of declining revenues for battery storage assets trading in Great Britain. Research from UK-based consultancy LCP Delta found a 71% decline in average battery storage profits in 2023, compared to the highs of 2021 and 2022.

Is the Bramley Bess connection queue over the UK's grid requirements?

Meanwhile, analysis by Cornwall Insight suggests that the BESS connection queue currently exceeds the UK's 2030 grid requirements twice over. The Bramley BESS is 'among the UK's longest-duration and most versatile energy storage assets', reports BW ESS.