Open call for evidence

Capacity Market: Hydrogen to Power and interconnectors

Applies to England, Scotland and Wales

Summary

We're seeking views on enabling the participation of Hydrogen to Power in the Capacity Market and technical changes to setting interconnector de-rating factors.

This call for evidence closes at

Call for evidence description

Ensuring security of electricity supply is vital to successfully achieving the Prime Minister’s Clean Energy Superpower Mission.

The Capacity Market is at the heart of the government’s strategy for ensuring security of electricity supply in Great Britain. It was first introduced in 2014 as part of the Electricity Market Reform programme to support investment in capacity and deliver value for money for consumers.

The Capacity Market Rules (the Rules), which set out the requirements on its participants, are regularly reviewed. This is to ensure the scheme remains fit for purpose and reflects changing market conditions. To support future policy development, the government is publishing this call for evidence to: 

  • Gather evidence to inform how Hydrogen to Power (H2P) plants should be categorised within the CM to enable the participation of H2P as a new technology. This includes gathering evidence related to the operation and reliability of H2P plants.
  • Test stakeholder views on updating the methodology for the technical adjustment element of the process by which interconnector de-rating factors are set, including testing how high-impact low-probability events should be treated within this methodology.

The call for evidence is open to anyone to respond to, but will be of particular interest to:

  1. Energy industry
  2. Consumer groups
  3. Academia
  4. Think tanks
  5. Other organisations who have an interest in security of supply and decarbonisation

Read our consultation privacy notice.

Documents

Ways to respond

or

Email to:

futureelectricitysecurity@energysecurity.gov.uk

Write to:

Electricity Markets & Arrangements
Future Electricity Security Team
Department for Energy Security and Net Zero
3-8 Whitehall Place
London
SW1A 2EG

Updates to this page

Published 2 October 2025

Sign up for emails or print this page