Long Duration Electricity Storage technical document
Summary
Ofgem Long Duration Electricity Storage technical document. Sets out the technical parameters and definitions for LDES cap-and-floor applications.
Why it matters
Technical scaffolding for the LDES cap-and-floor regime. Definitions of LDES (duration thresholds, technology eligibility) determine which projects can apply. Sister to the May/June 2025 financial framework and MCA decisions.
Areas affected
Memo
Long Duration Electricity Storage technical document | Ofgem Please enable JavaScript in your web browser to get the best experience. BETA This site is currently in BETA. Help us improve by giving us your feedback . Close alert: Long Duration Electricity Storage technical document Publication type: Decision Publication date: 11 March 2025 Topic: Electricity generation, Long duration electricity storage Subtopic: Electricity storage Print this page Related links LDES Cap and Floor Regime: our role, plan, and response to the DESNZ publication Long duration electricity storage: proposals to enable investment (GOV.UK) Long duration electricity storage Share the page Share on Facebook Share on Twitter Share on LinkedIn Following the government publication on Long Duration Electricity Storage (LDES), Ofgem published a call for input in December 2024. This document outlined our role and further thoughts on the cap and floor scheme for LDES. It included details on how we may select eligible projects in the first application round for the cap and floor regime award, timescales, and consultation questions. Based on the feedback and consultation responses to the open letter, Ofgem and the Department for Energy Security and Net Zero (DESNZ) are now releasing a joint Technical Decision Document (TDD) detailing the regime specifics. The TDD confirms key final details of the scheme and sets out how it will operate, application window timelines, eligibility criteria, the potential LDES capacity needed, among other technical details. An additional application guidance and eligibility assessment framework document will be published by Ofgem when the scheme opens this spring. If you have any questions, please contact us at LDES@ofgem.gov.uk . We are grateful for your feedback and thank you for your valuable contributions. Main document Long Duration Electricity Storage technical decision document [PDF, 490.36KB] Print this page Related links LDES Cap and Floor Regime: our role, plan, and response to the DESNZ publication Long duration electricity storage: proposals to enable investment (GOV.UK) Long duration electricity storage Share the page Share on Facebook Share on Twitter Share on LinkedIn Close