Secretary of State direction on the SMETS1 TMAD and further SMETS1 TMAD consultation

18 December 2020

SMETS1 TMAD direction

Today, 18 December 2020, the Department for Business, Energy and Industrial Strategy (BEIS) issued a direction to re-designate SEC Appendix AL ‘SMETS1 Transition and Migration Approach Document’ (SMETS1 TMAD) with effect from 21 December 2020.

This is to extend the SMETS1 TMAD expiry date from 31 December 2020 to 31 December 2021. Note, these changes will come into effect from 21 December 2020.

The BEIS designation letter and accompanying annexes are available to download below:


Further SMETS1 TMAD consultation

Further to the above, BEIS has issued a consultation on proposed amendments to the SMETS1 TMAD to support the enrolment and operation of SMETS1 Devices in the Data Communications Company’s (DCC’s) network.

The proposed amendments set out a framework for the development of options supporting the migration of SMETS1 Installations comprising Device Model Combinations (DMCs) which the DCC advise as currently blocked. This includes installations which still need evidence to enable the DCC to recommend that the Secretary of State approves corresponding entries onto the Eligible Product Combination List (EPCL) and those which are already approved to the EPCL but have encountered blocking issues to migration.

The BEIS consultation letter can be found here.

Comments on this proposal should be submitted by 5pm on 21 January 2021 to:


Where can I find further information?

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