An overview of how the SEMOpx electricity markets operate and the timelines they work on.
View the full range of static and dynamic reports available to download.
See dynamic report tables and graphs for latest auctions, which can be viewed online or downloaded.
Market related documentation and Trading & Technical documentation.
SEMOpx is governed by a set of rules and operating procedures that set out the obligations on Exchange Members and process for trading on the exchange.
Latest approved SEMOpx Rules, Procedures and any approved Modifications.
Modifications to the SEMOpx Rules.
Find registration information for a company to participate in the
Day-Ahead and Intraday Market.
To trade on SEMOpx Day-Ahead and Intraday Markets you need to complete the application process
Competitive, simple fee structure to participate and trade on the exchange.
Information on all aspects of Single Electricity Market.
Applies to trading day Saturday, 30 October 2021 for delivery
day Sunday, 31 October 2021.
Contains trading procedures - Trading day Saturday, 30 October
2021 for delivery day Sunday, 31 October 2021.
Details of recent website enhancements
Updated to Friday 24th September 2021. Some NI Participants