Sep 10, 2025

World’s Largest Battery Obtains Funding for Construction in the UK.

World’s Largest Battery Obtains Funding for Construction in the UK.
The world’s largest battery project has secured approximately £750 million ($1 billion) in funding from public and private sources and will begin construction in northern England, a major advancement for the UK's shift to renewable energy.

The 1.4-gigawatt system is being developed by Edinburgh-based Fidra Energy, with support from the National Wealth Fund and institutional investor EIG, as stated in a joint announcement. The Thorpe Marsh project is situated in South Yorkshire, the constituency of UK Energy Secretary Ed Miliband, and it has the potential to power over 785,000 homes.

This announcement is crucial as the UK is increasing its wind and solar capacity but requires additional storage solutions. Currently, gas generators primarily keep the lights on during unfavorable weather, so battery projects are essential for meeting the energy sector's 2030 climate targets.

“Every battery we build boosts Britain’s energy security,” Miliband remarked in the announcement.

Fidra Energy has signed long-term agreements with Electricite de France SA, Octopus Energy Ltd., and Statkraft AS for about 80% of the Thorpe Marsh project’s capacity, which is expected to be operational by mid-2027.

This project is recognized as the largest globally in terms of power output that has secured financing, according to BloombergNEF.

The funding comprises £594 million in loans from a consortium of international lenders, including ABN Amro Bank NV and China Minsheng Banking Corp Ltd.

EIG and the National Wealth Fund contributed £445 million to Fidra Energy for this and future projects.

Battery developers often face challenges with planning approvals and grid connections. However, this site had a planned connection date in 2027, safeguarding it from ongoing delays in grid connections, according to Fidra Energy CEO Chris Elder.

Due to its location on a former coal plant site, many usual planning obstacles were more easily navigated.

Fidra Energy is also advancing another 500-megawatt battery project in Nottinghamshire. Once finished, these two sites will account for 11% of the additional storage capacity necessary to meet the government’s 2030 objectives.