Gresham House funds 297MW UK BESS pipeline

Gresham House Energy Storage Fund has signed export credit-backed financing agreements for two UK battery energy storage projects, supporting equipment procurement for 297MW/594MWh of planned capacity.

The facilities cover the 240MW/480MWh Cockenzie project in East Lothian and the 57MW/114MWh Monet’s Garden project in North Yorkshire. Both assets are two-hour battery systems and form part of the fund’s wider storage pipeline.

The export credit facilities will fund up to 50% of the battery, inverter, and medium-voltage transformer equipment required for the two sites. Banco Santander is providing the facility, with equipment payments spread over ten years. The fund has also completed its acquisition of the Cockenzie project, which is expected to become the largest asset in its portfolio to date.

By reducing upfront capital requirements before senior debt is added, the funding structure gives the projects a clearer route toward construction. Gresham House expects senior debt facilities to cover up to 70% of Cockenzie and Monet’s Garden project costs, with both projects carrying grid connection dates in 2027.

Project and financing details are available through the Gresham House market announcement.

Equipment finance is becoming a more important part of storage delivery as battery projects scale up and move from early portfolios into larger grid-connected assets. Cells, inverters, transformers, switchgear, grid compliance systems, and balance-of-plant equipment all carry procurement, price, and delivery risks. Linking finance directly to major electrical equipment helps manage one of the largest capital components before construction reaches full pace.

The inclusion of medium-voltage transformers in the funded package is particularly relevant. Battery systems are often described through power and energy ratings, but the grid interface defines how the asset performs in operation. Transformers, inverters, protection systems, harmonic control, metering, communications, and control software determine how stored energy is converted into grid services.

The UK market is already moving toward larger and more sophisticated storage assets. SSE’s 150MW/300MWh Ferrybridge battery system has shown how former thermal generation sites can be reused for rapid-response flexibility, while new two-hour projects such as Cockenzie and Monet’s Garden are adding capacity into a market that still depends heavily on locational value, ancillary services, wholesale spread, and balancing opportunities.

Battery storage is also being pulled into a more complex system role. Low-demand periods, high renewable generation, and tighter balancing conditions require assets that can absorb and release power quickly. NESO’s summer outlook for a low-demand grid points to a system increasingly shaped by flexibility, curtailment management, and fast operational response.

For developers and investors, bankability now depends on more than securing a site and connection offer. Revenue modelling, equipment warranties, augmentation strategy, connection date certainty, grid code compliance, fire safety design, and long-term operations strategy all feed into project value. Financing structures that reduce early capital pressure can help projects reach construction, but execution risk remains concentrated around procurement, construction, and connection.

Cockenzie and Monet’s Garden will add meaningful capacity if they reach their 2027 connection dates. The next stages will test whether equipment supply, senior debt, construction works, and grid interface delivery can remain aligned as the UK’s battery storage pipeline continues to expand.