GC0117 refers to a Grid Code change proposal, initially raised back in June 2018, aimed at improving transparency and consistency of access arrangements for generation and storage connections across Great Britain by creating a common set of requirements. Specifically, the proposal seeks to reduce the existing three thresholds of Small, Medium and Large generators to two, defining Large Power Stations as those with a Registered Capacity of 10MW and above, and Small Power Stations as those below 10MW. Thus, the Medium category would be removed in England and Wales.

Ofgem have opened a consultation on their minded to decision to approve the Original Proposal with the response deadline 11 April 2025. In a departure from the norm, the Connectologists discuss the proposal in the context of 2025 with none of the team supporting implementation. Our Connectologists can almost always debate a topic with the merits of all options discussed, yet in the case of GC0117 this was not straightforward. Listen to Philip Bale, Catherine Cleary, Pete Aston and Kyle Murchie as they draw out some of their key concerns and suggestions.

Link to Ofgem’s Grid Code 0117 Final Modification Report Minded-to Decision Consultation -https://www.ofgem.gov.uk/consultation/grid-code-0117-final-modification-report-minded-decision-consultation

Recorded 19 March 2025

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