Non-SIT LDSO Qualification

Please note that this phase is now complete.

This page is for information only. If you are new entrant LDSO please refer to the new entrant LDSO page.

If you have any questions about this page, please email the Qualification team at MHHSQualification@elexon.co.uk

Placing Reliance

Non-SIT Licensed Distribution System Operators (LDSO)s that wish to Place Reliance on testing undertaken by others must submit a Non-SIT Placing Reliance Form to the MHHS Programme. Code Bodies review these Placing Reliance proposals and confirm to the MHHS Programme and Non-SIT LDSOs so that the scope of Qualification Testing (QT) is clear.

Qualification Testing (QT) and Pre-Integration Testing (PIT)

Each participant is required to complete Pre-Integration Testing (PIT) (assured by the MHHS Programme against defined PIT Exit Criteria) and undertake its other MHHS Qualification preparation activities, such as Data Integration Platform (DIP) onboarding. The party must then submit its Initial Qualification Assessment Document (QAD) as per timelines set out in Qualification Approach & Plan (QA&P) Appendix C. 

You can find more information on the Qualification Approach & Plan, including the documents that are available, on the Qualification Approach & Plan page of this website. Code Bodies will review the initial QAD submission, seeking clarifications where required.

The MHHS Programme Qualification Test Manager manages Qualification Testing (QT) on behalf of the Code Bodies. A more detailed explanation of the QT process is set out in the QA&P Annex 1: Non-SIT LDSO MHHS Qualification Testing Approach and Plan, also available on the Qualification Approach & Plan page of this website.

Non-SIT LDSOs should continue to develop the content of their final QAD submissions in parallel with QT.

Where a test cannot be completed in QT, we expect Non-SIT LDSOs to develop work-off plans, which are reviewed with the MHHS Programme Qualification Test Manager and agreed with Code Bodies.

Completion of Qualification Testing

Once a Non-SIT LDSO has completed QT (assured by the MHHS Programme against defined QT Exit Criteria), it is required to provide a final QAD submission. Code Bodies will review this document and work with the party to finalise it. Once the content has been agreed as complete for the purposes of MHHS Qualification, it must be signed by a Company Director.

Code Bodies will then approve MHHS Qualification for the Non-SIT LDSO in accordance with the QA&P Section 11.3 MHHS Qualification Approval. Once MHHS Qualified, the party must complete Service Activation before it can operate in the new MHHS arrangements.

The high-level preparation schedule for QT is detailed below. More specific dates are included in the Participant Checklist which you can find on the Planning page of this website. There are also timelines for submitting the QAD to Code Bodies that an LDSO needs to adhere to. These timelines are included in QA&P Appendix C which you can find on the Qualification Approach & Plan page of this website.

Qualification Testing Preparation Schedule