With over £20 billion of battery energy storage projects in planning, and Clean Power 2030 calling for 23–27 GW by decade’s end, the pressure to deliver is rising — not just for developers, but also for system operators, investors, and policymakers tasked with delivering a flexible, low-carbon grid.
Battery buildout lags behind targets and projections, slowed by grid delays and operational challenges.
Q1 2025, however, represented another quarter in which battery capacity growth was in the right direction, including the start of operations of two flagship batteries that contributed 76% of the increase in energy capacity.
This report breaks down the current state of battery buildout in GB, spotlighting:
- Part 1 - The buildout in Q1 2025, including the start of operations of two large flagship batteries, changes to average duration, and the impact on revenue benchmarking for BESS in Great Britain;
- Part 2 - A review of the updated pipeline out to 2028 following the results of the T-1 and T-4 Capacity Market auctions.
- A data download of the battery energy storage project pipeline out to 2028