- 23.03.2026
DAM ANNOUNCEMENT – DAYLIGHT SAVING TIME
Please note that on Saturday night to Sunday, Europe officially makes the transition from Central European Time (CET) to Central European Summer Time (CEST), where 02:00 become 03:00. Therefore, the delivery day of March 29, 2026 has 23 hourly intervals, 46 half-hourly intervals and 92 quarterly-hour intervals. For more information on how to proceed in this situation, please see “Operational procedure regarding functioning of the Day-Ahead electricity Market”. - 06.11.2025
Single Day Ahead Coupling (SDAC) Parties announce the organization on 19.11.2025 (for delivery day 20.11.2025) of the training session for SDAC decoupling.
Information package regarding the SDAC decoupling training session.
You can find the document on the [NEMO Committee] and [ENTSO-E] websites.
Details about this training session will be distributed to the Market Participants by email.
- 02.10.2025
It was published Operational procedure regarding functioning of the Day-Ahead electricity Market – revision 7, which it will be enforceable as of 30th September 2025 approved with ANRE Advice no. 36 from September 30, 2025. - 25.08.2025
OPCOM submit to public consultation the Operational procedure regarding functioning of the Day-Ahead electricity Market, updated in the context of the implementation of the 15-minute resolution and the possibility of offering at 15-minute, 30-minute and 60-minute resolution.
Please send your proposal to email pzu@opcom.ro until September 5th, 2025, inclusively.
- 18.08.2025
Information Package for the restart of the SDAC 15-Minute MTU Joint Member Testing Activities
We would like to inform you that the Information Package for the SDAC 15-Minute MTU Joint Member Testing Phase was published. You can find the material on the [NEMO Committee] and [ENTSO-E] websites.
- 03.04.2025
SDAC 15Min MTU Information Package
We inform you that SDAC 15-Minute MTU Information Package was published.
You can find the document on the [NEMO Committee] and [ENTSO-E] websites.
19.03.2025
Information Package for the SDAC 15-Minute MTU Joint Member Testing
We are pleased to inform you that the Information Package for the SDAC 15-Minute MTU Joint Member Testing Phase was published. You can find the material on the [NEMO Committee] and [ENTSO-E]. websites.
OPCOM will organize a webinar on the introduction of the 15-Minute Market Time Unit (MTU) within the Romanian Day-Ahead Coupling (SDAC) planned on 25th of March 2025 (presentation will be held in Romanian language) and on 26th of March 2025 (presentation will be held in English language).
11.02.2025
SDAC 15Min MTU workshop organized by Market Coupling Consultative Group Meeting We are pleased to invite you to the online workshop organized by the Market Coupling Consultative Group (MCCG) on 14th of February 2025. The session will take place from 10:00 to 12:00 CET. The workshop will focus on the introduction of the 15-Minute Market Time Unit (MTU) within the Single Day-Ahead Coupling (SDAC). The detailed agenda, including registration instructions, can be found here.11.03.2024
OPCOM publishes the document concerning Second auctions: Frequently Asked QuestionsView Details HERE.
15.02.2024
OPCOM announces the organization on 20.03.2024 of the following test, with the involvement of market participants, within Single Day Ahead Coupling, SDAC: Full Decoupling..
Common Invitation is available HERE.Details about this test will be distributed to the Market Participants by email.
- 12.09.2023
NEMO Committee announces the organization of the 1st Annual Conference
We are pleased to invite you on September 20 to the NEMO Committee’s 1st Annual Conference. You have the option to participate either online or in person. You can find the registration form under this link and the agenda is available here.
15.09.2022
OPCOM announces the organization on 13.10.2022 of the following test, with the involvement of market participants, within Single Day Ahead Coupling, SDAC: Full Decoupling.
Common Invitation is available HERE.Details about this test will be distributed to the Market Participants early next week.
04.07.2022
Publication of CACM Annual Report 2021- The configuration instructions for accessing the interface of the settlement system starting with 15.06.2022 have been published.
08.06.2022
Successful go-live of the Core Flow-Based Market Coupling project 08/06/202201.04.2022
OPCOM submits to public consultation the Operational procedure regarding functioning of the Day-Ahead electricity Market reviewed for the Core FB MC ProjectOPCOM submits to public consultation the Operational procedure regarding functioning of the Day-Ahead electricity Market (working document) reviewed for the Core FB MC Project. It is important to note that the bidding process, other actions and processes in relation to the market participants do not change, except for the Decoupling processes deadlines as follows:.
- SDAC Full Decoupling deadline to shift from 14:00 to 14:20;
- SDAC Partial Decoupling deadline to shift from 12:45 to 13:05.
The other updates are in principal related to:
- the Core Common Capacity Calculation tool (Core CCCt) to be used by Core TSOs, respectively
- the Central Interference Point (CIP) established by Core NEMOs as a single end point in order to communicate with Core CCCt.
The Operational Messages document has also been reviewed.
We kindly request to submit your proposals for Operational procedure regarding functioning of the Day-Ahead electricity Market to pzu@opcom.ro not later than noon on 06 April 2022.18.10.2021
OPCOM announces the organization on 20.10.2021 of the following test, with the involvement of market participants, within the BG-RO Market Coupling project:Partial Decoupling, including Shadow Auctions run by JAO (for reasons related to CZC).
Details about this test are available HERE.01.10.2021
OPCOM submit to the public consultation process Operational procedure regarding functioning of the Day-Ahead electricity Market, revised in context of RO-BG border integration under the Single Day-Ahead Market Coupling (SDAC, Single Day-Ahead Coupling) by implementation of the Market Coupling Project from Romania and Bulgaria (BG-RO MC). The operational messages document remain unchanged.
Please send your proposal at Operational procedure regarding functioning of the Day-Ahead electricity Market to email pzu@opcom.ro, until 06th of October 2021, inclusively.
04.06.2021
Following the public consultation process of the Operational procedure regarding functioning of the Day-Ahead electricity Market, updated considering the switch to operation in coupled mode at European level at the time of implementation of the DE-AT-PL-4M MC project, OPCOM publishes the summary of received comments on Operational procedure regarding functioning of the Day-Ahead electricity Market, sent to ANRE for approval.
- Summary of the comments and proposals received, following the public consultation of the Operational procedure regarding functioning of the Day-Ahead electricity Market
- Operational procedure regarding functioning of the Day-Ahead electricity Market
In addition, OPCOM publishes a complementary document to the Operational procedure regarding functioning of the Day-Ahead electricity Market, in which the operational messages, initially included in the annex to the Operational procedure regarding functioning of the Day-Ahead electricity Market, were moved to facilitate a dynamic updating process whenever that is required by the functioning of the Romanian Day-Ahead Market under the Single Day-Ahead Coupling (SDAC), and to be transmitted to the participants (via the local trading system and / or via email) in various market situations, as presented in the document.
Also, following the public consultation process, OPCOM publishes:
- Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market,
- Operational procedure regarding the receipts and payments related to the transactions on the Day Ahead Market,
- Summary of the comments to the Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market
24.05.2021
Having regard to the request of some market participants to extend the period during which OPCOM seeks to gather views on the following procedures:
- Operational procedure regarding the receipts and payments related to the transactions on the Day Ahead Market,
- Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market,
- Operational procedure regarding functioning of the Day-Ahead electricity Market,
updated considering the switch to operation in coupled mode at European level at the time of implementation of the DE-AT-PL-4M MC project, we inform you that the new deadline by which you can send your proposals to pzu@opcom.ro is 28.05.2021, inclusively.
With regard to the „Operational procedure regarding functioning of the Day-Ahead electricity Market”, the amendments made relate mainly to:- The timings of the market coupling session for both normal situation, with no delays, and in the event of a deviation from the normal operation deadlines and / or processes,
- Implementation of the partial decoupling solution, when it is not possible to implicitly allocate the cross-border capacity at SDAC level for a certain delivery day, respectively separate decouplings of interconnections, bidding areas or regions may be carried out,
with the following clarifications:
- The bidding process, actions and processes in relation to market participants shall not be modified, except for the timings corresponding to the coupling session;
- All the other exceptional situations shall not change from the market participants pointof view, except for the timings corresponding to the coupling session.
Furthermore, considering that ANRE has submitted to the public consultation the "Order for the repeal of the Regulation for organization and functioning of the day-ahead electricity market in compliance with the price market coupling mechanism and amendment of some procedural acts that regulate the day-ahead electricity market approved with the Order of ANRE President No. 82/2014”, the „Operational procedure regarding functioning of the Day-Ahead electricity Market” to be endorsed by ANRE has been amended to include the provisions deemed necessary to be maintained following the repeal of this order which aims to regulate the functioning of the day-ahead electricity market.
With regard to amndment process of the „Operational procedure regarding the receipts and payments related to the transactions on the Day Ahead Market” and the „Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market”, we would like to emphasize that these documents have been amended according to the timing for the coupling session, the provisions related to time limit against which the validation guarantee is calculated, and other elements (definitions) required to be harmonised with the „Operational procedure regarding functioning of the Day-Ahead electricity Market” provisions.
To support the Market Participants, both „Operational procedure regarding the receipts and payments related to the transactions on the Day Ahead Market” and the „Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market” have been supplemented with a new chapter concerning the market participants’ right to make appeals (terms, contestable elements, the content of the appeal, the deadlines by which OPCOM is required to rule an any justified dispute etc.).
19.05.2021
OPCOM submit to public consultation the Operational procedure regarding functioning of the Day-Ahead electricity Market (working document), updated in the sense of moving to operation in a coupled mechanism at European level with the implementation of the DE-AT-PL-4M MC project, a context in which the actions and deadlines in the pre-coupling, coupling and post-coupling processes are adapted / modified.
Please send your proposal to email pzu@opcom.ro, until 25th of May 2021, inclusively.
19.05.2021
OPCOM submit to public consultation the Operational procedure regarding the receipts and payments related to the transactions on the Day Ahead Market, (working document), and Operational procedure regarding the establishment, verification and use of financial guarantees for the participation in the Day Ahead Market, (working document), updated in the sense of moving to operation in a coupled mechanism at European level with the implementation of the DE-AT-PL-4M MC project, a context in which the actions and deadlines in the related processes are adapted / modified
Please send your proposal to email decontare@opcom.ro, until 28th of May 2021, inclusively.
23.04.2021
Webinar presenting the implementation of the DE-AT-PL-4M MC (Interim Coupling) Project
21 April 2021
14:30 - 16:30DE-AT-PL-4M MC (Interim Coupling) Project: 21st April webinar presenting information about the expected changes and the member tests
NEMOs and TSOs had a joint webinar on 21 April to provide market participants with detailed information about the expected changes and the member tests scheduled for the second half of May.
Slides Implementation of the DE-AT-PL-4M MC (Interim Coupling) Project Event
Recordings of the DE-AT-PL-4M MC (Interim Coupling) Project Event
21.01.2021
Clarification of DAM changes applicable from the day of delivery 01.02.2021We inform you of the following clarification that complements the announcement published by OPCOM on 19.01.2021:
- Excel template for offers does not changed; in any case, for completeness, we mention that the template has been extended in the Physical Notifications sheet, the updated version being available here
20.01.2021
OPCOM publishes the examples of NF for DAM aplicable from the delivery day 01.02.2021
For Physical Notifications testing, OPCOM publishes examples (xml files) of a participant's transactions notification / Physical Notification of concluded transactions related to a BRP:(right click / save)
19.01.2021
Dear Day Ahead Market Participants,By this information, once with implementing the settlement with a resolution of 15 minutes (1st of February 2021), OPCOM would like to highlight the following aspects referring to the functioning of the Day Ahead Electricity Market:
- 1st of February 2021 Delivery Day will be the first day for which the Physical Notification will be changed to 15 minutes resolution, respectively the Physical Notification will contain time series with 96 quarter-hour intervals (respectively 92/100 for short/long clock change);
- offering and trading will continue to be performed at hourly basis;
- Excel template for offers does not changed;
- The way the data is displayed in the trading system does not change (Offers, Trade confirmation, ATC and so on)
- Only the Physical Notifications files will be changed to 15 min resolution: MOPHY, BRPPHYNO, TPPHYNO will have 96 (100/92 intervals) instead of 24 (25/23).
The implementation of the new rules will have no effect on the available validation guarantee for positive price bids and/or negative price offers and neither on receivings /payments mechanism, respectively direct debit mandates and bank guarantee letter.
With regard to the applicable rules, OPCOM informs market participants that the package of rules for the Day Ahead electricity market updated for operation as of 01.02.2021 has been published for consultation in accordance with the ANRE President's Order No. 230/16.12.2021, other applicable national or European provisions, respectively:
For any questions or additional information requests OPCOM making the generic address pzu@opcom.ro available to market participants and other interested parties as well.19.01.2021
OPCOM submits to public consultation the Day Ahead Market electricity market Accession Agreement and Procedure related to the operation of the Day Ahead Market electricity market revised following the transition to Physical Notifications with a granularity of 15 minutes.
Please send your proposals to email pzu@opcom.ro, in letter format, assumed by the legal representative of the company, and in word format until 29th of January 2021.
- 05.12.2019
The documents related to the Day-Ahead Market functioning have been adviced by ANRE on 3rd December and are published - 31.07.2018
ACER Decision for the approval of NEMOs’ Proposal for the price-coupling algorithm and for the continuous trading matching algorithm, also incorporating TSO and NEMO proposals for a common set of requirements. 21.03.2016
Information about the incident on 19/03/2016 - 4M MC decouplingOn the 19/03/2016 during the market coupling session for delivery day 20/03/2016 technical issue with integration of market coupling results was identified.
As the issue was not resolved by the deadline set by the 4M MC procedures, market participants were informed on Incident Committee decision to decouple CZ, SK , HU and RO markets.
Market coupling session of the following trading day 20/03/2016 ran without any problem.
Communication to market participants ran exactly according to the 4M MC procedures and process in the decoupling mode took place correctly.
The cause of the issue was identified shortly after the incident and also workaround which will prevent the issue from happening again, was applied.07.11.2014
IMPORTANT! Dear DAM participants we remind you that, according to:- ANRE Order 82/03.09.2014 for approval the Regulation for organization and functioning of the Day-Ahead Market for electricity adapted for functioning in market coupling framework and with amendments of acts that regulates Day-Ahead Market functioning, published in the Official Journal No. 668 from 11 September 2014,
- art. 5 – Current Order is published within the Romanian Official Journal, Part I and get into force on 11 November 2014.
- The Regulation for organization and functioning of the Day-Ahead Market for electricity adapted for functioning in market coupling framework and with amendments of acts that regulates Day-Ahead Market functioning,
- art. 194 – The last delivery day based on national DAM rules, before the delivery day which the coupling market mechanism applies on CET basis, shall contain 25 trading intervals.
- art. 195 – If necessary, for period in between the day when this Regulation applies and effective day when market coupling mechanism applies, the DAM is considered functioning in decoupling way and the last resort procedure applies.
10.11.2014 will be the last trading day based on current DAM rules and on currently DAM trading system version for delivery day 11.11.2014. This delivery day shall contain 25 hourly intervals. You can find details for creating the XML offer file within the attached presentation sustained during the training on-line that all DAM participants had been invited to participate.
The trading day 11.11.2014 shall be the first trading day for delivery day 12.11.2014 based on trading rules provided within the Regulation mentioned above and on the new version of DAM trading sistem adapted to new DAM trading rules. Trading intervals starting with this delivery day relate to CET.
10.10.2014
IMPORTANT! The TEMPLATE was published for the creation of offers for the DAM for the testing period of the trading system with the new functionalities that the participants will use in the bidding process starting from the moment of their entry into operation.Introducing 4M Market Coupling Project and planned operational market design
The Czech, Slovak, Hungarian and Romanian NRAs, TSOs and PXs are jointly working on implementing the extension of CZ-SK-HU Market Coupling to Romanian day-ahead electricity market based on PCR solution. The planned Go-Live Date is 11 November 2014. The parties present an overview of the project and a description of the planned future operation of the 4M Market Coupling
- The new S.C. OPCOM S.A. IT&C Trading System. It provides to the market participants a friendly interface, available in Romanian and English languages, easy to use once the basic concepts have been learned. The access modality of the trading system is described in the document named «The User’s Guide for the Day Ahead Market Participant». This document may be downloaded from OPCOM`s website. For accessing the application, it is necessary that the IT security system of the participant allows https traffic to/from the system. The trading system is a web application that has no special requirements. Thus, a personal computer equiped with a free USB port is enough, running Microsoft Office 2000, XP or Vista operating system. The application is compatible only with Internet Explorer browser, at least with 6.0 SP1 version. For assuring the full security of the transactions, a robust certification, authentication and data encryption system is implemented. This implies that the market participant connects to the system using an USB Token authentication key – which is unique and customised – and it has the ActivCard software client installed. For acessing the trading system, each participant will receive it`s customized USB Token key and a CD containing the associated ActivCard software with its installation instructions. Trading is possible either by filling the offers directly on the web interface, or by the transfer (upload) of the XML file which contains the offer, after it has been edited. This file may be edited by using Notepad and also by a dedicated application such as XMLSpy. The USB Token must not be damaged or lost, because without it trading is not possible. Software installation and USB Token use do not raise particular issues, but, if these issues still occur, OPCOM`s specialized personell will provide you with the necessary technical assistance. For any details or information regarding the IT&C Trading System please contact IT&C System Administration Department on : +4021 3071.404
- S.C. OPCOM S.A. IT&C Trading System, platform designed in accordance with the new Commercial Code approved by the National Regulatory Authority for Energy no.25 of October 22, 2004 and published in the Official Journal of Romania no.989 of October 27, 2004 came into operation since 06/30/2005. The modality of access to the trading system is described in the document named «The User`s Guide for the Day Ahead Market Participant ». This document may be downloaded from OPCOM`s site (www.opcom.ro). To connect to the trading and settlement systems the market participant needs an USB Token authentication key – an unique and customized key – and which has the ActiveCard client software installed. For accessing the applications (in order to participate to the Day Ahead Market and also for settlement purposes) the IT security system of the participant to allow https traffic to/from the system is necessary. The USB Token authentication key and the necessary URL adresses for accessing the applications will be available to each participant in the market starting december 30, 2004, based on signing a Bailment Contract. The USB Token key is owned by OPCOM. The damage or loss of the USB Token make impossible the trading and/or viewing/dowloading the files which contain the settlement reports. If the USB token authentication key is lost or damaged, the market participant may request it`s replacement, according to the conditions stipulated in the attached «Bailment Contract». OPCOM’s specialized personnel will provide the necessary training for using the authentication key. Electric energy sale and/or buying offers may be submitted in the application through an XML file or directly from the web interface. Useful applications for the conversion of (xls) Excel files into XML format will be also available to the market participants. The customized USB Token authentication keys are handed to the market participants who have signed the attached «Bailment Contract ». The customized key for your company will be taken over by the bailment contract signatory, as the representative of the bailor.
- For Microsoft Windows Vista operating system download the driver for ActiveKey Sim from Actividentity from here and installs it on the computer after the software supplied by OPCOM (ActivCard Key) has been installed. Select the 2 ActiveKey options in CUSTOM SETUP menu. For any details or information regarding the new IT Trading System please contact IT&C System Administration Department on : +4021 3071.404
