Santander UK has provided debt financing for two UK battery energy storage system (BESS) projects: a £42.7 million facility for Econergy's 80MW/240MWh BESS at Immingham, England, and a separate senior debt facility for Brockwell Energy's 60MW/120MWh BESS at Inchbean Farm, East Ayrshire; both have reached financial close and no equity consideration is disclosed.

Econergy Renewable Energy Ltd (TASE: ECNR) is a Tel Aviv-listed European IPP operating across the UK, Italy, Spain, Romania, Poland and Greece with a pipeline exceeding 14GW. The Immingham deal is Econergy's third UK BESS financing with Santander, following the 102MWh Swangate project and the 40MW/120MWh Dalmarnock deal closed in January 2026, and replicates the same Santander debt plus EDF revenue floor structure.

The Immingham floor agreements with EDF Energy Customers Limited are expected to generate contracted revenues of approximately £45–50 million over ten years, representing approximately 50% of total expected project revenues. Brockwell Energy is a UK-based renewable energy developer; its 60MW/120MWh Inchbean Farm BESS received Scottish planning consent in June 2025, with Fluence as EPC contractor.

The structural driver is the convergence of three financing conditions that did not exist simultaneously until 2025: project finance bankability for standalone BESS assets, long-term revenue floor agreements from creditworthy offtakers, and a Capacity Market framework providing a government-backed income floor complementing merchant revenues. Standalone tolling deals in Europe rose from 3 in 2024 to 15 in 2025, with the UK at the centre of that change.

The Econergy-EDF model, where EDF provides both a guaranteed minimum revenue floor and commercial optimisation above that floor, converts BESS from a merchant power asset into a partially contracted infrastructure asset that project finance lenders can underwrite at viable debt-to-equity ratios.

Santander's third BESS transaction with Econergy in under twelve months signals a systematic financing franchise rather than one-off deal flow, institutional capital availability, not technology or planning, has been the binding constraint on UK BESS deployment since 2023.

For Ireland, the Santander-EDF structure is the template that Irish BESS developers are watching closely. Eirgrid and the CRU are developing equivalent DS3 and capacity revenue frameworks, but Irish BESS projects have not yet achieved the project finance bankability this structure has unlocked in the UK.

Source: solarpowerportal.co.uk / edfenergy.com / ratedpower.com / energy-storage.news