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Market IT Systems FAQ 

1. What is the Market Participant Interface (MPI)?

2. What is a Digitial Certificate?

3. What happens to my bids if there is a system failure?

4. What is CCQT?

5. System Requirements

6. IT releases, when and why they are necessary?

7. How do I update my contact details in the Market Participant Interface?

8. If my contact details change, how do I let SEMO know?

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1. What is the Market Participant Interface (MPI)?

The MPI is a software application, hosted by SEMO, that allows Market Participants to interact with the Single Electricity Market (SEM). The MPI is accessed via the Internet Explorer internet browser. It is a multi-functional application which allows Participants to:

  • Submit Commercial Offer Data (COD) and Technical Offer Data (TOD);
  • Download Invoices and Statements;
  • Download many reports from wind forecasts to SMP prices.

In order to access the MPI a user must have a valid Digital Certificate and password. These Digital Certificates are only issued to Market Participants.

There are 3 classes of communication between participants and the SEM Central Market Systems. The MPI facilitates Type 2 and Type 3 communication.

Type 1 is written communication via FAX.

Type 2 Communication is screen based, to provide a human-to-computer Interface i.e. data submission and retrieval using the Market Participant Interface

Type 3 Communications use web services to provide an automated, computer-to-computer interface.

For more information on the MPI please refer to section 2 of the Market Participant Update Document (MPUD) here.

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2. What is a Digital Certificate?

Digital Certificates are issued to Market Participants by Verisign. Each User identifies themselves to the SEM Central Market Systems using a unique Digital Certificate and associated passcode. This includes screen-based Users accessing the Market Participant Interface (MPI) and automated Users via Web Services. The Certificate is a .pfx file that acts as a passport to the MPI for participants. Each time a user uses the MPI, this unique Certificate needs to be installed in the users Internet Browser and the passcode must be entered. The Digital Certificates are used as a security measure to ensure only Market Participants have access to the MPI and therefore access to market sensitive information.

Each user’s digital certificate can be assigned various permissions for each of the functional areas of the MPI as shown in the table below.



The Digital Certificate is obtained as per the procedure in Agreed Procedure 3: Communication Channel Qualification

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3. What happens to my bids if there is a system failure?

If SEMO’s central market systems fail a General Systems Failure or GSF is declared. For details please see (What is a GSF?)

If a participant is having a problem with their systems and cannot submit bids electronically a Limited Communications Failure or LCF is declared. (see what is an LCF)

If no participants can submit bids to SEMO central market systems then a General Communications Failure or GCF is declared. Please see ‘What is a GCF?’ for details.

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4. What is CCQT?

CCQT is Communication Channel Qualification Testing. It is a process whereby an applicant ensures that they can communicate with the Central Market Systems by completing a range of scripted tests. The testing is usually completed during Step 2 of the registration process (Unit registration)

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5. System Requirements

The system requirements for participants wishing to access the SEM systems are as follows:

System Requirements Document

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6. IT releases, when and why they are necessary?

The Central Market Systems (CMS) consist of a complex suite of applications, operating across multiple platforms which enable SEMO to efficiently operate the Single Electricity Market (SEM) and to meet its obligations under the Trading and Settlement Code (T&SC). These systems accept data from, and provide data to, many key stakeholders of the SEM, including Market Participants, Transmission System Operators, Meter Data Providers, Interconnector Administrator etc.

The definition and the delivery of change defines the evolution of the SEM. Industry driven policy decisions are the source of the majority of change, however regular reviews, monitoring and assessment of the technical aspects of our systems also mandate change. All change to the CMS is handled by defined change management and release management processes.

Software updates to the CMS are facilitated by the SEMO IT department and can be categorised into two broad categories:

Scheduled Releases:

Scheduled Releases are employed to deliver a series of changes to the SEM in a controlled, robust manner utilising a proven project delivery methodology. Typically these releases deliver industry-mandated functional enhancements, operational efficiencies and technical upgrades to the CMS.

SEM operates a bi-annual scheduled release strategy with releases typically implemented in April and October of each year. Each release has a Release Cut-Off date whereby any change to be considered for inclusion in a release must be submitted to SEMO prior to this date. Typically the Release Cut-Off date is eight months prior to a release but depending on the scope, complexity and scale of the release may be adjusted as required.

The bi-annual release approach allows SEMO to package a set of changes into one release which:

Ensures efficient industry resource allocation;

Ensures changes which have inter-dependencies can be delivered in an integrated manner;

Facilitates a defined and robust product delivery methodology;

Offers a defined schedule of change to which all of the industry has agreed; and

Reduces the overall delivery costs.

Emergency Releases:

Emergency Releases are employed when a critical defect is identified in the CMS which prevents SEMO from delivering its core service or which hinders the secure operation of the SEM. Emergency releases are only considered if an alternative and appropriate workaround cannot be applied to eliminate the specific issue. Emergency Releases are reactive in nature, are utilised as a “fast response” mechanism to a threat to the operation of the SEM and may be employed at any time.

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7. How do I update my contact details in the Market Participant Interface?

To update your contact details in the Market Participant Interface (MPI) please follow these steps:

1. In the MPI ensure you have your Digital Certificate selected (hit the browse button and select your digital cert) and your PFX Password entered.

2. Select Registration in the Main Menu dropdown box.

3. Under the application tab scroll to the bottom of the page where you will find a section called Main Contact and User.


4. Update the Contact Details in this section and click submit.

This will generate a contact details update request and this request will be processed as soon as possible.

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8. If my contact details change, how do I let SEMO know?

All user contact details are stored in the MPI. SEMO cannot edit these details for market participants. Participants are encouraged to ensure that their contact details in the MPI are kept up to date at all times.

To update contact details in the MPI:

Open your web browser and log into the MPI at https://market.allislandmarket.com/mi_webapps/

Select 'Registration' in the Main Menu Drop Down

Select the Application Tab in the top left hand corner

Scroll down the page and your should see a section entitled ‘Main Contact and User’

Update this section with the name and contact details of your Main Contact User

Click Submit

SEMO will immediately be notified of your update and will send future correspondence to that user.

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SEMO is a joint venture between EirGrid PLC and SONI Limited