UK: Large-Scale Energy Storage Drives Strong Rebound, Reaching 22.1 GWh in 2029

 

The UK energy storage market is expected to see a significant rebound in 2025, with new installations expected to reach 3.4 GWh, a 17% year-on-year increase, 73% of which will come from large-scale storage. This growth will ensure that the UK maintains its position as Europe's largest battery energy storage market in 2025, with annual installations reaching 11.1 GWh. According to the neutral scenario, by 2029, the UK will see annual new energy storage additions reach 22.1 GWh, 90% of which will be large-scale projects, bringing the cumulative installed capacity to nearly 60 GWh, gradually approaching the 27 GW target set out in the Clean Energy 2030 Action Plan.

 

The core factor behind the UK's energy storage rebound is Europe's largest battery grid-connected pipeline, coupled with comprehensive revenue mechanisms and grid operation support. Although frequency market returns have reached a mature stage, limiting future profitability, the continued decline in battery prices will further improve project economics. Investors will gradually shift from relying on frequency services to a business model centered around spot arbitrage, ancillary services, and long-term contract revenue.

 

By 2025, the installed capacity of the behind-the-meter energy storage market will be approximately 900 MWh, of which 700 MWh will be in the residential market (accounting for 77.8%) and 200 MWh in the commercial and industrial (C&I) market. Although the overall share of behind-the-meter energy storage will decline annually, the residential storage market is expected to maintain slow growth, driven by favorable policies such as the 0% VAT exemption (until March 2027), low export PV electricity prices, subsidies for low-income households, and simplified approval procedures. By 2029, the installed capacity of the residential energy storage market is expected to reach 1.2 GWh.

 

Meanwhile, commercial and industrial storage in the UK also demonstrates significant growth potential. With continued improvements in the policy framework, this segment is expected to surpass the 1 GWh mark for the first time in 2029, primarily for peak shaving and price arbitrage.