SEC designation implemented

13 March 2020

An updated version of the SEC came into effect on 13 March 2020 to implement a designation by the Department for Business, Energy and Industrial Strategy (BEIS).


Approval of SMETS1 DMC onto the EPCL for DCC SMETS1 services

On 13 March 2020, BEIS approved the first Morrisons Data Services (MDS) Device Model Combination (DMC) onto the Eligible Product Combination List (EPCL).

The release is scheduled for 20:00 on Saturday 14 March 2020.

This new Data Communications Company (DCC) functionality will enable the migration of these devices into the DCC System and use of Smart Metering Equipment Technical Specifications 1 (SMETS1) services by DCC Users. In doing so this will allow Energy Suppliers to bring back Smart Services for those customers who have lost them and enable them to retain services on Change of Supplier.

  • The BEIS approval letter can be found here.


SSD amendments supporting go live of initial DCC SMETS1 service operating capability

BEIS has issued a Government response to the consultation of 18 February 2020 on amendments to SEC Subsidiary Documents (SSDs) to support the enrolment and operation of SMETS1 devices in the DCC national communications network. BEIS directs the incorporation of a new version of the Transition and Migration Approach Document into the SEC effective from 13 March 2020.

  • The BEIS direction letter and accompanying annexes can be found here.


What parts of the SEC were affected?

  • SEC Appendix AL ‘SMETS1 Transition and Migration Approach Document’


The redlined changes for SEC Appendix AL can be found here.

Our Document Log lists the versions of each SEC document now in effect following this release.

You can download the individual SEC documents from the SEC and Supporting Documents section of our website or via CodeWorks.


Testing Baseline Requirements Document update

BEIS has also updated the Testing Baseline Requirements Document. It can be found here and on our Developing SEC page.


Where can I find further information?

If you have any questions, you can call the SECAS Helpdesk at 020 7090 7755 or email