For registered participants: CS OTE Portal Sandbox CZ

Market Coupling - Day-Ahead market

OTE, a.s (OTE, Market Operator) is the nominated electricity market operator (NEMO) in the Czech Republic and as such cooperates with other European NEMOs to implement single day-ahead and intraday electricity markets across Europe, which is the goal set out in the European Commission Regulation 2015/1222 of 24 July 2015 establishing a guideline on capacity allocation and congestion management (CACM Regulation). OTE representatives are thus actively involved in individual market coupling projects.

Market coupling (day-ahead and intraday), as required by the CACM Regulation, leads to the removal of barriers to cross-border trading and promotes one of the fundamental principles on which European cooperation is based – securing the free movement of goods, persons and services. An energy market divided into individual national markets (though physically interconnected) is inefficient and trading on it is riskier, thus more expensive.

Even though electricity markets coupling is primarily intended to facilitate trading and reduce losses from inefficient use of cross-border capacity allocation, the overall impact is much wider. For traders, thanks to the unification of trading rules, market coupling facilitates access to individual European markets and the expansion of business opportunities. For transmission system operators it increases the efficiency of cross-border profiles. For the end customer, the creation of a single electricity market brings increased security of electricity supply as well as benefits that result from a wider range of suppliers thanks to increased competition in individual markets. In the overall context, this pushes down the unregulated electricity prices, resulting in lower overall costs of electricity.

On the day-ahead market, the projects include All NEMO Committee, Single Day-Ahead Coupling (SDAC), 4M Market Coupling (4M MC), Core Flow-Based Market Coupling (Core FB MC), DE-AT-PL-4M Market Coupling (Interim Coupling) and 15min Market Time Unit.

News from the day-ahead market can be found here:


Increased threshold triggering second auction procedure to EUR 2,400 per MWh


NEMO Committee newsletter, October 2022


Harmonised maximum clearing price for SDAC remains at 4.000 EUR/MWh


Invitation: Seminar on CACM Annual Report 2021


Successful go-live of the Core Flow-Based Market Coupling project 08/06/2022


New Go- Live of Core Flow-Based Market Coupling Project


Harmonised maximum clearing price to be set to +4,000 EUR/MWh from 10th May


Postponement of the Core Flow-Based Market Coupling project Go Live


The Core Flow-Based Market Coupling project announces that member testing will start on 04/04 2022


Invitation to the Core Flow-Based Day-Ahead Market Coupling Operational Readiness Webinar


Market Coupling Steering Committee (MCSC): enhancement of NEMOs' and TSOs' cooperation around market coupling in the day-ahead and intraday timeframe


Progress of Joint Integration Testing and Go-Live date of the Core Flow-Based Market Coupling project

22/11/2021 Postponement of the Core Flow-Based Market Coupling project Go Live date
17/07/2021 The European Day-Ahead Market Successfully Coupled
15/06/2021 Interim Coupling project: Go-live confirmed for 17 June 2021 A further step towards an integrated European electricity market
10/05/2021 Updated planning of the DE-AT-PL-4M MC (Interim Coupling) Project
23/04/2021 Webinar on the implementation of the project DE-AT-PL-4M MC - materials
18/03/2021 Updated test planning of the DE-AT-PL-4M MC (Interim Coupling) Project
01/02/2021 Joint press release to Interim Coupling start of testing February 2021  
13/11/2020 Start of publication of Core flow-based day-ahead capacity calculation data and market coupling simulation results, and updated project planning.
09/11/2020 Current status of the DE-AT-PL-4M MC (Interim Coupling) Project
24/03/2020 The Basic Principles of the Interim Coupling Project
03/03/2020 Up-to-date information on the Core Flow-Based Market Coupling project
10/12/2019 NEMOs publish the first CACM annual report on intraday and day-ahead coupling
09/12/2019 Countries of 4M Market Coupling to be connected with Multi Regional Coupling by end of 2020 and Interim Coupling project enters implementation phase
31/07/2019 The NEMO Committee propose amendments to Algorithm Methodology and ID Product Methodology to support market coupling evolutions
03/06/2019 NEMO Committee announces launch of new website and launch of a joint public consultation on Algorithm Methodology
01/08/2018 Approval of the methodology according to the CACM Regulation
19/02/2018 Approval of methodologies according to the CACM Regulation
23/11/2017 ACER decision on the nominated electricity market operators’ Proposal for harmonized maximum and minimum clearing prices for single day-ahead and intraday coupling 
14/11/2017 Submission of the revised Proposals for conditions or methodologies according to the CACM Regulation for approval
18/07/2017 MCO Plan approved