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Spalding Battery Energy Storage System in Lincolnshire

The Spalding Project will deliver one of the largest battery energy storage systems (BESS) in the world.

Battery Energy Storage Systems will play a key role in the UK’s drive to bring all greenhouse gas emissions to net zero by 2050. InterGen is seeking a co-investor to take up to 49% equity in their BESS project at Spalding, Lincolnshire which will have a final capacity of 550 megawatts for a 2 hour discharge duration ( 550 MW/2 hours, or 1100 MWh) with zero greenhouse gas emissions.

The first phase of the Spalding Project will be 300MW and operational by 2026.

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Investment type:

Capital investment - energy and infrastructure


(Sustainable infrastructure, Energy storage)

Project promoter:



£160 million

Time to Final Investment Decision (FID):

1-2 years

Hamira Khan

Senior Investment Manager

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Sector and market opportunity

When completed, the project will operate in the UK’s electricity wholesale and balancing markets. It will also provide reserve and ancillary services to the National Grid, offering flexible and dynamic services to help ensure electrical grid stability.

The project is at an advanced stage of development and the operational lifespan is expected to be around 20 years with repowering potential to extend.


The project is located next to InterGen’s existing Spalding projects in the east of England, where a number of the UK’s offshore wind farms connect to the UK’s electricity network.


The Spalding Project is located approximately 100 miles from both London and Birmingham, and is easily accessible via a number of international airports, and the UK’s railway and road network.

Local talent and skills

The location is close to InterGen’s existing Combined Cycle Gas Turbine (CCGT) and Open Cycle Gas Turbine (OCGT) Spalding stations, providing operational/maintenance benefits. It will also benefit from InterGen’s existing, well-established trading capability.

Region Spotlight


The Midlands is at the forefront of technologies such as industrial digitisation, life sciences and alternative fuels. It's home to world-class assets and centres of innovative excellence. The region is ideally placed for the distribution of manufactured goods, reaching 92% of the UK population within 4 hours. Birmingham is at the heart of one of the UK’s largest infrastructure projects, HS2, and hosted the 2022 Commonwealth Games.

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Environmental, social and governance (ESG) highlights

BESS projects make an important contribution to the UK’s target of reaching net zero emissions by 2050. They are zero carbon and provide or store power almost instantaneously. As such they provide flexibility and a range of ancillary and system support services to help balance and manage the electricity system. The need for these services will services will grow as renewable capacity increases.

Promoters and partnerships

Active in the UK since the 1990s, InterGen is an independent power generator with a track record of developing, constructing, and operating large-scale power generation projects. InterGen has invested over £2 billion to develop and construct a portfolio of 3 combined cycle gas turbine (CCGT) and 1 open cycle gas turbine flexible power stations, totalling 2.8 GW.

The Spalding Project represents a key stage of InterGen’s strategy to diversify and become a leading energy storage system operator in the UK. Its ambition is to have 3 GW of projects in commercial operation by 2030 – with the potential to grow subject to further market needs.

InterGen has already identified further locations for grid-scale projects, including at Gateway on the Thames Estuary. While the Spalding Project is expected to be taken forward on a standalone basis, both the Spalding and Gateway Projects (and other opportunities) could be progressed with the right partner as InterGen recognises that some investors prefer scale.

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The government is identifying new projects across the whole of the UK. Investors who are interested in our projects can find out more by contacting us.

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