Low carbon and nuclear energy

Includes regulations, consultations and guidance on low carbon and nuclear energy.

We are the regulator for long duration electricity storage. We oversee the implementation of a 'cap and floor' regime for long duration electricity storage projects, proposed by the Department for Energy Security and Net Zero (DESNZ).

We also regulate companies who are building nuclear energy infrastructure under the Regulated Asset Base (RAB) model.

Consultations

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New Regulatory Instructions and Guidance (RIGs) for Sizewell C (nuclear licensee): consultation

We are proposing to issue new Regulatory Instructions and Guidance (RIGs) under Special Conditions 21.11 and 21.12 of the Regulated Asset Base licence for Sizewell C.

Published date: 23 July 2025

Case type: Consultation

Consultation on Long Duration Electricity Storage Project Assessment

We are seeking views on our proposed approach for assessing which Long-Duration Energy Storage (LDES) projects should be awarded a cap and floor regime.

Published date: 28 May 2025

Case type: Consultation

LDES Cap and Floor Regime: our role, plan, and response to the DESNZ publication

DESNZ has tasked Ofgem with implementing a cap and floor regime to encourage investments in LDES. This call for input invites feedback from stakeholders to help shape the final plan and ensure we can decide on approved projects by mid 2026.

Published date: 18 December 2024

Case type: Call for input

View all low carbon and nuclear energy consultations