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 Frequently Asked Questions (FAQs) 




This section is aimed at providing a general understanding of the Integrated Single Electricity Market (I-SEM), how it operates and project updates. This section also provides information relating to the Systems Implementation, SEMOpx, Market Readiness, Market Trial and Market Rules.



General Information


If you are new to the I-SEM Project and need to find out information, you will find background, training, calendar events and learning resources in this section.

General FAQ
Hot Topics
Quick Guide to the I-SEM
I-SEM Industry Guide



This section covers Registration for a number of Markets including Day-Ahead, Intraday, Balancing etc.                   

I-SEM Registration FAQ



Market Trial


This section covers Market Trial including general information, new publications, structure, approach and market updates.

Market Trial FAQ

Market Readiness


Information about Participant and Market Readiness including general information, survey assessment reporting and market updates.                      

Market Readiness FAQ 



Market Systems


This section covers Market Systems including general information on the Technical Specification Volumes, new publications, TLG related information and market system updates.

Market Systems FAQ

Market Rules


This section covers Market Rules including general information on Market Codes and SEMOpx Codes, new publications and market updates.

Market Rules FAQ



SEMO is a joint venture between EirGrid PLC and SONI Limited