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SMETS1 Consultation - Clause retention beyond SMETS1 TMAD expiry and proposed amendments to the SMETS1 Supporting Requirements

DCC is consulting on the retention of clauses in the SEC Appendix AL SMETS1 Transitional Migration Approach Document (SMETS1 TMAD) in preparation for its expiry on 31st December 2025, and a proposed addition to the SMETS1 Supporting Requirements (S1SR).

The TMAD sets out the requirements and obligations for migrating SMETS1 Devices on to DCC systems. Migration of SMETS1 meters has completed following Secretary of State approval of the Requesting Party Decommissioning Timetable for the final SMETS1 cohort, MOC (Secure). 

As the SMETS1 TMAD approaches its expiry date, DCC has reviewed the document for any content that is required to be retained and proposes that those sections are added to the SMETS1 Supporting Requirements (S1SR) along with minor changes to SEC Appendix AC (Inventory, Enrolment and Withdrawal Procedures).

The S1SR contains clauses that explain SMETS1 Device behaviour where that behaviour does not align to GBCS. We propose additions to the S1SR to detail as yet undocumented SMETS1 Device behaviour.