The UK’s battery storage sector is charging ahead at an incredible pace. Since 2020, operational capacity has increased by 509%, climbing from 1,128 MW to 6,872 MW in 2025. So far this year, more than 1,405 MW of new capacity has been commissioned, already beating the total for 2024 and putting the industry on track to surpass 2023’s record.

Largest UK battery storage projects, including the Thorpe Marsh BESS, Fithie Battery Energy Storage System, Trafford Battery Storage System, Innova Almhome Energy Hub, Brant Energy Storage, Lightrock Power’s Stable Green Energy site, RES’s Coalburn project, and other major developments like Devilla and Coalburn 2, are leading the charge to shape this energy transition.

In this blog, we’ll explore the top 7 battery energy storage system projects in the UK for 2025. We’ll look at each project’s capacity, project cost, current status, and how it supports the broader shift to clean energy. 

List of Top 7 Battery Energy Storage System Projects in UK 2025 (according to capacity)

Thorpe Marsh BESS

Thorpe Marsh BESS is the largest upcoming battery energy storage system (BESS) project in the UK, with a total capacity of 1,400 MW / 3,100 MWh. Fidra Energy is leading the project and has secured nearly GBP 1 billion in funding from EIG, the National Wealth Fund, and a consortium of international lenders to finance its development.

The facility will be the largest standalone BESS project in Europe and globally, set to export over 2 million MWh of electricity annually. Once operational, it will supply power to more than 785,000 homes each year. Long-term offtake agreements covering about 80 percent of the capacity have been signed with EDF, Octopus Energy, and Statkraft.

Sungrow will supply Power Titan 2.0 battery systems, while H&MV Engineering will design and execute grid connection, electrical, and mechanical works. Jones Bros. Civil Engineering will manage the site's civil and drainage construction. The project also received a fifteen-year capacity market award from the UK Government starting in October 2028.

This largest commercial solar battery energy project in UK supports the energy transition by enabling renewable integration, improving grid stability, and reducing energy waste. It is a key part of the wider storage pipeline, including the West Burton BESS, and could contribute significantly to the additional capacity required under the Clean Power 2030 mission. Construction will begin immediately, with operations expected to start in 2027.

Fithie Energy Park BESS

Fithie Energy Park is a proposed large-scale battery energy storage project near Dundee, designed to deliver up to 1,400 MW of renewable electricity for two hours. Once operational, it will store and release enough power to meet the peak demand of approximately 1.6 million homes, strengthening Scotland’s renewable energy infrastructure.

The site covers around 97 acres of agricultural land at Tealing in Angus. The project is planned with a 24-month construction timeline and an operational lifespan of up to 50 years. Developers are engaging closely with local councils and communities to shape the project’s delivery and ensure local benefits.

A planning application was submitted to the Scottish Government’s Energy Consents Unit in 2025, with a decision anticipated in 2027. If approved, construction will begin in 2031, using local contractors where possible, and the facility is expected to go live in 2033.

Trafford BESS – Carlton Power

Carlton Power is constructing one of the biggest BESS projects in the UK with a capacity of 1,040 MW. The USD 963 million (GBP 750) Trafford BESS will provide 1,040 MW of capacity with two hours of storage (2,080 MWh), helping to stabilise the North West’s energy grid, support renewable integration, and enhance energy security.

In July 2023, Trafford Council granted planning permission for the project, which will be built on a 12-hectare site that once hosted a coal-fired power station. Construction of the project commenced in early 2024 after the final investment decision was made. This commercial battery storage in UK is expected to enter operation by the end of 2025.

Innova Almhome Energy Hub

Innova Almhome Energy Hub is set to become one of the UK’s largest battery energy storage system projects, featuring a total capacity of 1,025 MW / 2,050 MWh. The project will be co-located with a 49.9 MW solar farm at a 173-acre site near Doncaster, designed to deliver substantial renewable energy generation and storage.

The facility will include 894 BESS containers and employ bifacial photovoltaic solar panels capable of producing 10–20% more power than traditional setups while reducing solar glare. Once operational, the energy hub will generate enough electricity to power over 15,000 homes annually and store energy to support around 37,000 homes for a week.

The project aims to enhance local biodiversity far beyond statutory requirements, with predicted gains of 82% in wildlife habitats, 132% in hedgerows, and 16% in watercourses. A community benefit fund will also support local initiatives throughout the project's 50-year lifespan.

Although construction has not yet started, planning consent requires the development to commence within five years. Once decommissioned, the site will be restored to its original agricultural state, ensuring a long-term environmental commitment alongside its energy contributions.

Brant Energy Storage (NatPower Coleby BESS)

NatPower’s Coleby BESS project is a proposed 1 GW battery energy storage system aimed at supporting the next generation of energy transition initiatives. The facility will be built on a 35-hectare site situated 600 meters west of Coleby and east of Broughton Lane in Lincolnshire.

The system will use lithium iron phosphate batteries, a proven and widely used technology found in everyday devices such as smartphones. The project aims to enhance grid flexibility and facilitate renewable energy integration while ensuring long-term operational reliability.

Over its lifespan, including battery replacements, the BESS is expected to produce approximately 15.8 million tonnes of CO₂ equivalent, based on industry-average emission factors provided by Brant Energy.

Planning approval was validated by North Kesteven District Council in May 2025, following a public consultation that launched in March 2025. Construction timelines and grid connection dates are yet to be confirmed.

Coalburn 1 & Coalburn 2 (Combined)

The Coalburn Battery Energy Storage System in South Lanarkshire, Scotland, is set to become one of Europe’s largest grid-balancing energy storage facilities. The project, developed by Copenhagen Infrastructure Partners (CIP) and Alcemi, is being built in two phases with a combined capacity of 1,000 MW and 2,000 MWh.

Phase 1, known as Coalburn 1, broke ground in November 2023 and is expected to come online in early 2026. A 50% ownership stake in the project will be divested to alternative investor AXA IM Alts once commissioning is completed. Phase 2, Coalburn 2, is scheduled to start construction in 2027 and will double the site’s storage capacity, transforming a former opencast coal mine into a renewable energy asset.

RES, the world’s largest independent renewable energy company, will manage the site’s operations to ensure efficient performance and long-term value. The batteries will use lithium-ion technology and are designed to store and release power in two-hour charge cycles, helping balance the grid during high demand or when renewable output drops.

Once fully operational, Coalburn will provide enough energy storage to power approximately three million homes. This development is part of CIP’s broader strategy to expand the UK’s battery storage infrastructure, alongside projects like the 500 MW Devilla site in Fife.

NatPower Teesside GigaPark

NatPower UK has announced plans to build the Teesside GigaPark at the Wilton International site in Redcar, creating one of the largest and longest-duration battery energy storage systems (BESS) in the UK. The 32-acre project, representing a GBP 1 billion privately funded investment, will deliver 1 GW of power with up to 8 GWh of storage capacity, operating in phases to meet growing energy demands.

The project is the first in the UK to combine large-scale battery storage with maritime electrification infrastructure, providing dedicated support for ships at berth (cold ironing) and future electric vessel propulsion systems. A 1 GW National Grid connection will enable reliable, affordable renewable energy for industrial operations and ports across the region.

The Teesside GigaPark will initially offer 4 GWh of storage before expanding to 8 GWh, doubling its capacity. This long-duration setup is designed to reduce clean energy curtailment, which currently costs the UK up to GBP 3.5 billion annually, while bolstering industrial resilience and anchoring Teesside as a national clean energy hub.

The project is expected to create around 200 construction-phase jobs, provide long-term skilled employment, and invest up to GBP 2 million annually in a community benefit fund. With a planned operational date in 2028, the Teesside GigaPark stands as a pioneering infrastructure initiative that aligns energy storage with the UK's industrial and maritime future.

Conclusion – UK BESS Energy 2025

The battery storage projects in the UK are helping the country meet rising energy demands, integrate renewable sources, and move closer to its Clean Power 2030 goals. The UK’s battery storage sector continues to grow year after year, backed by a robust pipeline of projects and strong planning activity.

Recently in June, the UK government has approved a record 5 GW BESS projects. Over 6.8 GW of battery storage is now online, supported by a strong pipeline of 6.5 GW under construction and over 60 GW approved. As the country races toward its Clean Power 2030 targets, battery storage is playing a crucial role in balancing renewable energy and ensuring grid reliability.

Despite challenges like grid reform deadlines and funding constraints, the momentum remains strong. These projects not only add capacity but also bring technological innovation, grid stability, and economic opportunities, confirming that battery storage is at the heart of the UK’s clean energy future.

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