SEC v37.0 released to implement MP148

23 April 2021

An updated version of the SEC came into effect on 23 April 2021 to implement MP148 ‘IVP Extension for pre-SMETS2 v4.2 Devices’.

MP148 has extended the Installation Validity Period (IVP) end-date for any pre-Smart Metering Equipment Technical Specifications (SMETS) 2 v4.2 Devices by 12 months from 27 April 2021 to 27 April 2022. This will allow Supplier Parties and Device Manufacturers to avoid significant financial costs that would be incurred if the previous IVP end-date reminder. This would have been caused by having to write off the existing stock of pre-SMETS v4.2 Devices which would not have been able to be installed past the previous IVP end-date.

What parts of the SEC were affected?

The following part of the SEC was affected:

  • SEC Schedule 11 ‘TS Applicability Tables’

Where can I access the redlining?

The redlined changes to this Schedule can be found on CodeWorks via the links below:

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.

Where can I find further information?

Further information can be found on the MP148 page of our website. If you have any questions, you can call the SECAS Helpdesk at 020 7090 7755 or email