Renewable Energy Guarantees of Origin (REGO)

The Renewable Energy Guarantees of Origin (REGO) scheme provides transparency to consumers about the proportion of electricity that suppliers source from renewable electricity.

This scheme provides certificates called REGOs which demonstrate electricity has been generated from renewable sources.

How does REGO work?

One REGO certificate is issued per megawatt hour (MWh) of eligible renewable output to generators of renewable electricity.

The primary use of REGOs in Great Britain and Northern Ireland is for Fuel Mix Disclosure (FMD). FMD requires licensed electricity suppliers to disclose to potential and existing customers the mix of fuels (coal, gas, nuclear, renewable and other) used to generate the electricity supplied.

Guarantees of Origin

EU Member States version of the REGO scheme is called Guarantees of Origin (GOOs). As of 1 January 2021, the EU no longer recognises UK REGOs.

Government will cease to recognise EU GOOs from April 2023 but will continue to accept them for the 2022-23 reporting period. This will allow electricity suppliers in the UK to continue to use REGOs and EU GoOs to comply with their fuel mix disclosure obligations. We also expect market participants to be able to meet proof of supply requirements in Great Britain, including explicit (no-deal arrangements for Continental interconnectors) trading arrangements.

If you have UK REGOs that you want to use in the EU you will need to seek independent advice as Ofgem cannot provide any guarantees they will be accepted.

Who can apply for the REGO scheme?

Generating stations in Great Britain and Northern Ireland that produce electricity from eligible renewable energy sources can apply for and receive Renewable Energy Guarantees of Origin certificates (REGOs).

Applications for accreditation under the scheme are made via the Renewables and CHP register; more details on this can be found on the apply and log into the register web page.

Our role in the REGO scheme

Ofgem is the administrator of the REGO scheme for generation in Great Britain on behalf of the Department for Energy Security & Net Zero, and in Northern Ireland on behalf of the Northern Irish Utility Regulator (UR).

We regularly report to HM Revenue & Customs and the Department for Energy Security & Net Zero and are responsible for the annual Fuel Mix Disclosure compliance deadline.