Version 5.11 of the Smart Energy Code has been designated

7 November 2017

SEC version 5.11 came into effect on 6th November 2017. The Secretary of State has directed changes to the following documents:

  • SEC Appendix AH ‘Self Service Interface Design Specification’;
  • Schedule 8 ‘GB Companion Specification’ (v1.1); and
  • Schedule 11 ‘TS Applicability Tables’.

Please note that Schedule 8 (GBCS) version 1.0 has an applicability end date of 7th May 2018. Therefore, Schedule 8 versions 1.0 and 1.1 will both apply until 7th May 2018. Please refer to Schedule 11 for the specific dates associated with the applicability of each version of Schedule 8.

The full relined changes to these documents are available here. You can also download a zip folder containing SEC v5.11 here, or download the individual sections of the SEC from the SEC and Guidance Documents page of our website.

If you have any questions or would like to discuss the changes to the SEC further, please contact the SEC Modifications Team on 020 7090 7755 or email