Energy storage in the United Kingdom
Energy storage in the United Kingdom
Current regulatory developments
Updated September 2026
Clean Power 2030 (23–27 GW BESS target); Oversubscribed Technology Fee
LDES cap-and-floor regime (Ofgem Q2 2026 approval)
Ancillary services reforms (Dynamic Response suite)
Cybersecurity and fire safety compliance obligations
Mature market for banked tolls & floors
Five things to know about BESS in the UK.
Storage is treated as generation for licensing purposes, but planning regimes differ. Across England, Wales and Scotland, BESS below 50 MW is exempt from the requirement for a generation licence; BESS projects 50 MW+ require an Ofgem generation licence unless another exemption applies. For standalone BESS, projects in England are generally consented by the relevant local planning authority irrespective of capacity; in Wales, 50–350 MW projects fall within the national Infrastructure Consent regime; and in Scotland, projects above 50 MW currently require s.36 consent from Scottish Ministers (subject to proposed reform). BESS forming part of a wider generation/hybrid project may instead be consented through that project’s national consenting regime (e.g. as associated development under an English DCO).
Revenue is derived from a sophisticated “stack” of market products managed via optimization agreements. Battery storage revenues in the UK are typically derived from a combination of revenue streams managed via an optimization agreement with an energy aggregator/offtaker. These include (as applicable) Mandatory Frequency Response (MFR), Firm Frequency Response (FFR), Fast Reserve, Short Term Operating Reserve (STOR), Capacity Market payments (for up to 15 years), BM Start Up, Dynamic Response Services (Dynamic Containment, Dynamic Moderation, and Dynamic Regulation), wholesale market trading (day-ahead and intraday), and the Balancing Mechanism. The government’s Clean Power Action Plan expects 23–27 GW of battery storage by 2030 to support clean power, up from 4.5 GW in 2024.
LDES cap-and-floor support is creating a new route to bankability for long-duration storage. Ofgem has provisionally selected 16 projects totalling approximately 7.6 GW for support under the first application window, across pumped-storage hydro, compressed-air storage, lithium-ion BESS and vanadium redox-flow batteries. The regime provides qualifying projects with downside revenue protection through a floor, with revenues above the cap returned to consumers. Final Window 1 awards are expected in autumn 2026, with further application windows expected to follow.
Grid reform is fundamentally reshaping the BESS development pipeline. Under TMO4+, projects must demonstrate both readiness and strategic alignment to secure a firm Gate 2 connection, replacing the previous largely queue-based approach. For BESS, alignment with Clean Power 2030 introduces technology and location specific capacity limits, meaning that otherwise viable projects may struggle to secure priority connections where the relevant capacity allocation is already oversubscribed and the project is not otherwise “protected” with further queue attrition potentially driven by a proposed Oversubscribed Technologies Commitment Fee for BESS. Although intended to produce a faster and more deliverable connections pipeline, the reforms create significant uncertainty for BESS development post 2030. Planning and land-use constraints, supply-chain pressures and technology risks remain additional challenges.
Fire safety is an intensifying regulatory and planning risk. Following a BESS fire at a project under construction in Essex in February 2025, parliamentary debate has focused on whether fire and rescue services should be made statutory consultees in planning applications for BESS. While there is no single piece of legislation setting specific requirements for BESS sites, a framework of product safety, fire safety, and health and safety legislation applies. The government published guidance in August 2023 encouraging developers and local planning authorities in England to consult their local fire and rescue service. New EU and UK cybersecurity standards are also now shaping supplier selection, system architecture, and due diligence timelines.
Credentials
Gresham House Energy Storage Fund (GRID) on its initial public offering in 2018, all acquisitions, construction, and financing of over 30 energy storage projects to date in the UK, including all supporting optimisation and revenue arrangements
Pulse Clean Energy on the acquisition, construction and financing of all of its energy storage projects to date in the UK, including all associated revenue contracts
National Wealth Fund on its £200 million investment alongside Equitix and Aware Super on a £500 million UK battery storage platform operated by Eelpower Energy
Tesla on its £5 billion contractual framework with NatPower to deploy an initial 25GWh of BESS in Italy and the UK, with the potential to deploy up to 100GWh of BESS
Offtakers such as EnBW, Octopus, BP and others on revenue floor contracts and tolling agreements for BESS projects
Market participants on various aspects of project development in four of the 11 “minded-to” LDES decision projects
Bluestone Energy on the sale of their BESS portfolio to Eku Energy including seven planned projects in the UK totaling 1GW / 2GWh
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