- Publication date
- 15th November 2018
- Information types
- Policy areas
The Energy Company Obligation is a government energy efficiency scheme for Great Britain, administered by Ofgem.
Our guidance documents provide information on the legislative requirements of the ECO3 Order and our administrative processes. The ECO3 Order commenced on 3 December 2018 and runs until 31 March 2022. The ECO (Amendment) Order 2019 came into force on 1 January 2020 and we have updated our documents to reflect this. Please use version 1.5 for all measures installed after 1 October 2020. For measures installed from 1 January 2020 until 30 September 2020 use version 1.4. For measures installed between 1 October 2018 and 31 December 2019 use version 1.2.
We have split the ECO3 Guidance into two parts.
- ECO3 Guidance: Supplier Administration, and
- ECO3 Guidance: Delivery
The Delivery guidance is aimed at suppliers and the broader supply chain, describing how to deliver measures that are eligible to contribute towards the ECO targets. The Delivery guidance addresses the following:
- how a supplier achieves its obligations
- which measures are eligible under ECO and the criteria that must be met
- specific requirements relating to eligibility
- how to determine ECO savings, including information on deemed scores and SAP/RdSAP
- how measures are notified and the information we require
- the technical and score monitoring requirements that suppliers must meet
- the auditing and counter fraud processes that suppliers will be subject to.
This has meant this document is larger than previous guidance documents so we recommend viewing it as a PDF on your computer or tablet rather than printing.
For measures installed before 30 September 2018, please refer to our ECO2t guidance Delivery and Administration, Versions 1.1.
Document updated March 2019
Version 1.2 of this guidance includes corrections and updates to the previous version. Details of changes can be found in the summary of updates to the guidance document which can be found below.
Document updated February 2020
Version 1.4 of the document should be used for all measures from 1 January 2020 until 30 September 2020. This document provides further clarifications and updates from Version 1.3 (draft for comment) published in October 2019. Details of changes can be found in the summary of updates to the guidance document which can be found below.
Document updated September 2020
Version 1.5 of the document should be used for all measures from 1 October 2020. This document provides further clarifications and updates from Version 1.4 (draft for comment) published in February 2020. Details of changes can be found in the summary of updates to the guidance document which can be found below.