The UK market saw strong interest and activity in 2025 but now appears to be shifting from a development market to one focused on execution, writes Solar Media analyst Charlotte Gisbourne.

While the UK grid-scale BESS market continues to be among the busiest in Europe, there are still huge questions and plenty work to be done in several key policy areas.

The UK grid-scale battery storage market grew 45% in 2025, with 4GWh coming online during the year, bringing total operational capacity to 12.9GWh.

BESS asset management in the UK has moved beyond the rudimentary ‘project delivery and basic O&M’ approach, a speaker at the upcoming Battery Asset Management Summit UK & Ireland explained in a Q&A.

Local authorities approved 1,237MW/2,474MWh of grid-scale BESS in the UK, the latest data from our monthly roundup shows.

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Just over 70% of the successful projects in the first window of the UK’s long-duration energy storage (LDES) scheme are using lithium-ion BESS technology.

Projects supported by the UK government’s long-duration energy storage (LDES) cap-and-floor could significantly dampen price spreads but also affect non-LDES flexibility assets.

Fidra Energy has secured £1 billion for the largest BESS in the UK, while EDF and Elements Green have agreed a toll for a 720MWh system.

Long-term BESS offtake and PPA deals are clearly on the rise in Europe, but how are they evolving vi-a-vis structures, tenors and regional differences?