Drax pulls Cruachan II pumped hydro project from UK LDES cap and floor, cites rising costs

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Drax however today (1 May) said it would not participate in this first phase of the cap and floor scheme with the 600MW Cruachan II project, an extension of the existing 440MW Cruachan pumped storage plant. The firm completed initial design and engineering work on an option to extend it last year.

‘The projected cost of Cruachan II has risen over the past two years, whilst at the same time, the recoverability of all capital invested in the project remains unclear. Therefore, Drax will not participate in this first phase of the cap and floor scheme but will retain the option for potential future development, subject to an appropriate balance of risk and return,’ it said in a trading update.

The company believes the project is aligned with the long-term system need in the UK for flexible generation and energy storage and its location in Scotland is ideal given the cross-border constraints, with lots of wind generation in and around Scotland but big demand centres being south of the border. The firm first applied to expand Cruachan in 2022.

The decision to pulled Cruachan from the scheme is interesting considering that a collection of the UK’s short-duration battery energy storage system (BESS) owner-operators have recently signalled their opposition to the LDES cap and floor in an open letter, saying it is biased towards pumped storage. Cruachan II has been one of the most high-profile pumped storage projects expected to bid in.

We published an interview with one of the signatories, James Basden, founder of Zenobē, yesterday (Premium access), in which he argued the LDES cap and floor is the wrong approach to securing resiliency for the grid of the future.

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