ACER publishes its Final Assessment of the EU Wholesale Electricity Market Design

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ACER's Final Assessment of the European Wholesale Electricity Market Design
Intro News
ACER has published today its Final Assessment of the EU Wholesale Electricity Market Design, which fulfils the mandate given by the European Commission in October 2021. ACER will present its Final Assessment at a public webinar on the 5th May.

ACER publishes its Final Assessment of the EU Wholesale Electricity Market Design

What is it about?

The EU Agency for the Cooperation of Energy Regulators (ACER) has published today its Final Assessment of the EU Wholesale Electricity Market Design.

What’s in the report?

This ACER Final Report presents an in-depth analysis of:

  • energy price levels and drivers

  • current wholesale electricity market design

  • ways to future-proof the wholesale electricity market

  • extreme price shocks and considerations on temporary, targeted measures

  • the impact on retail markets and how to protect consumers.

ACER concludes with a set of 13 measures for policy makers’ consideration.

Key Findings

Overall, ACER finds that whilst the current electricity market design is worth keeping, some improvements will prove key for it to deliver on important challenges, including:

  • Making short-term electricity markets work better everywhere

  • Driving the energy transition through efficient long-term markets

  • Increasing the flexibility of the electricity system

  • Protecting consumers against excessive volatility whilst addressing inevitable trade-offs

  • Tackling non-market barriers and political stumbling blocks

  • Preparing for future high energy prices in ‘peace time’; being very prudent towards wholesale market intervention in ‘war time’.

ACER’s 13 measures for consideration by policy makers

ACER’s analysis has put forward a suite of 13 measures for policy makers to future proof the market design, for example to:  

  • shield those consumers that need protection the most from price volatility

  • stimulate ‘market making’ to improve liquidity in the long-term markets

  • speed up electricity market integration, implementing what is already agreed

  • better integrate forward markets

  • consider prudently the need for market interventions in situations of extreme duress and, if pursued, consider tackling the ‘root causes’.

Access the full Assessment.

Next steps

ACER published its Preliminary Assessment in November 2021. This Final Assessment fulfils the mandate given by the European Commission in October 2021.

ACER will present its Final Assessment at a public webinar on the 5th May.  

ACER publishes its Final Assessment of the EU Wholesale Electricity Market Design

13 measures to future-proof the EU wholesale electricity market design

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REMIT Reporting guidance

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Transaction Reporting User Manual (TRUM)

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• TRUM (main text) (17/12/2024)

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Following the adoption of the revised REMIT Regulation (2024), revision of REMIT Implementing Regulation on data reporting (2026) and the new Delegated Regulation on registered reporting mechanisms and inside information platforms (2026), some documents are undergoing an update and may not reflect the most recent changes in the legal framework. Please use the documents at your own discretion.
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6.1st Edition (18/12/2024)

6.1st Edition in track changes (18/12/2024)

• 6th Edition (22/07/2021)

- Guidance Note 1/2019 – Layering and Spoofing (22/03/2019)

- Guidance Note 1/2018 – Transmission Capacity Hoarding (22/03/2018)

- Guidance Note 1/2017 – Wash Trades (19/06/2017)

• 5th Edition (11/05/2021)

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• 1st Edition (20/12/2011)

Guidance on REMIT application

Q&As on REMIT

Following the adoption of the revised REMIT Regulation, some documents are undergoing an update and may not reflect the most recent changes in the legal framework. Please use the documents at your own discretion.
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• Q&As on REMIT (12/03/2025)

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Open Letters on REMIT Policy

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Open letter on new Delegated Reguation (07/04/2026)

• Open letter on the designation of representatives by non-EU market participants and on the new obligations of persons professionally arranging or executing transactions (PPAETs), according to the revised REMIT (25/09/2024)

Open letter on the notifications of algorithmic trading and direct electronic access according to the revised Regulation (EU) No 1227/2011 (30/07/2024)

Open letter on the implications of the revision of Regulation (EU) No 1227/2011 on REMIT data reporting aspects and notification obligations (17/04/2024)

• Updated Open Letter on the extension of the possibility for market participants to publish inside information on their own corporate website as a backup solution (14/12/2021)

• Updated Open Letter on the withdrawal of the United Kingdom from the European Union and implications on the registration of market participants and data collection under REMIT (18/12/2020)

• Open Letter on the impact of Covid-19 on certain compliance deadlines under REMIT (20/11/2020)

• Open Letter on the withdrawal of the United Kingdom from the European Union and implications for REMIT (08/01/2019)

• Open Letter on Inside Information disclosure and the use of Inside Information Platforms (IIPs) (30/05/2018)

• No action relief on the ad hoc reporting (14/12/2017) 

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• No-action letter (07/01/2015)

REMIT Documents

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REMIT Legislation

Legislative documents by the European Commission governing the Agency’s REMIT activities

• REMIT Regulation (2011)

Regulation (EU) No 1227/2011 of the European Parliament and of the Council of 25 October 2011 on wholesale energy market integrity and transparency

• Regulation amending REMIT (2024)

Regulation (EU) 2024/1106 of the European Parliament and of the Council of 11 April 2024 amending Regulations (EU) No 1227/2011 and (EU) 2019/942 as regards improving the Union’s protection against market manipulation on the wholesale energy market

• REMIT Implementing Regulation (2014)

Commission Implementing Regulation (EU) No 1348/2014 of 17 December 2014 on data reporting implementing Article 8(2) and Article 8(6) of Regulation (EU) No 1227/2011 of the European Parliament and of the Council on wholesale energy market integrity and transparency

• Regulation amending REMIT Implementing Regulation (2026)

REMIT Delegated Regulation on authorisation and supervision of reporting entities (2026)

• REMIT Fee decision (2020)

Commission Decision (EU) 2025/1771 of 17 December 2020 on fees due to the European Union Agency for the Cooperation of Energy Regulators for collecting, handling, processing and analysing of information reported under Regulation (EU) No 1227/2011 of the European Parliament and of the Council

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ACER documents on the application of REMIT, including the Agency’s initiatives related to REMIT policy
Following the adoption of the revised REMIT Regulation in 2024 and of REMIT secondary legislation in 2026 (recast REMIT Implementing Regulation and new Delegated Regulation), some documents are undergoing an update and may not reflect the most recent changes in the legal framework. Please use the documents at your own discretion.
For any queries related to REMIT policy, REMIT transaction reporting or general issues, please use the REMIT query form or visit the REMIT Portal.

• ACER Guidance on REMIT

ACER Guidance on the application of REMIT

• Q&As on REMIT

The Agency’s answers to frequently asked questions about REMIT policy

• Open letters on REMIT policy

The Agency’s guidance to national energy regulators and to market participants on how to fulfil their REMIT obligations to help ensure consistent application of the laws

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ACER reports on REMIT-related activities and ACER Recommendations to the European Commission

• Latest report on PPATs’ arrangements, systems and procedures and their effectiveness

The Agency’s report on market surveillance by persons professionally arranging transactions (PPATs), monitoring the establishment and maintenance of proper market surveillance arrangements, systems and procedures and their effectiveness

• Latest report on national regulatory authorities’ activities related to suspicious transactions and order reports

The Agency’s report monitoring energy regulators’ analysis of suspicious transactions, response to poor quality reporting, non-reporting and enforcement activities and penalties

• REMIT Quarterly

Quarterly updates on REMIT-related activities, guidance on the application of the REMIT framework, assessments of the operation and transparency of different categories of organised market places and ways of trading

REMIT Documents

REMIT Reporting guidance & guidelines

ACER lists of reference data and ACER guidance on the technical and operational aspects of reporting REMIT data to the Agency
Following the adoption of the revised REMIT Regulation in 2024 and of REMIT secondary legislation in 2026 (recast REMIT Implementing Regulation and new Delegated Regulation), some documents are undergoing an update and may not reflect the most recent changes in the legal framework. Please use the documents at your own discretion.
For any queries related to REMIT policy, REMIT transaction reporting or general issues, please use the REMIT query form or visit the REMIT Portal.

• Transaction Reporting User Manual (TRUM)

Guidance for market participants on how to report trading data under REMIT and comply with data reporting obligations

• FAQs on transaction reporting

The Agency’s answers to frequently asked business and technical questions received in relation to the TRUM and transaction reporting

• Manual of Procedures (MoP) on Data Reporting

Guidance for reporting entities on the reporting of transactions, fundamental data and inside information

• FAQs on REMIT Fundamental Data and Inside Information

The Agency’s answers to frequently asked questions received in relation to the Manual of Procedures (MoP) on data reporting under REMIT and the collection of inside information and fundamental data

• Mapping between REMIT Implementing Regulation Tables and electronic schemas

Tables reporting the correspondence between Data Fields defined in the REMIT Implementing Regulation and those in the relevant electronic formats

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Technical documents describing validation rules to ensure REMIT data quality

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Guidance and tools for the registration of registered reporting mechanisms (RRMs)

• List of Standard Contracts

Reference list of contracts offered for trading by organised market places and guidance on how to update it

• Open letters on data quality

Periodic updates on the Agency’s monitoring of data quality and identified areas for improvement

REMIT Documents

Guidance on inside information collection

ACER guidance on the reporting of fundamental data and inside information
Following the adoption of the revised REMIT Regulation in 2024 and of REMIT secondary legislation in 2026 (recast REMIT Implementing Regulation and new Delegated Regulation), some documents are undergoing an update and may not reflect the most recent changes in the legal framework. Please use the documents at your own discretion.
For any queries related to REMIT policy, REMIT transaction reporting or general issues, please use the REMIT query form or visit the REMIT Portal.

• REMIT Guidance on the implementation of web feeds for Inside Information Platforms (13/12/2018)

Technical guidance on the implementation of web feeds, namely RSS or Atom feeds containing Urgent Market Messages (UMMs)

• FAQs on REMIT Fundamental Data and Inside Information (30/04/2021)

The Agency’s answers to frequently asked questions received in relation to the Manual of Procedures (MoP) on data reporting under REMIT and the collection of inside information and fundamental data

REMIT Documents

REMIT Fees

ACER guidance on the technical and operational aspects of the REMIT fee collection

• Background note on REMIT fees (14/01/2026)

Background note on the COMMISSION DECISION (EU) 2025/1771 of 8 September 2025 on fees due to the European Union Agency for the Cooperation of Energy Regulators for its tasks under Regulation (EU) No 1227/2011 of the European Parliament and of the Council and repealing Commission Decision (EU) 2020/2152

• Q&As on REMIT fees (07/10/2025)

The Agency’s answers to questions about the technical and operational aspects of the REMIT fee collection

• Annex to Q&As on REMIT fees (14/01/2026)

A summary of exceptions from the application of REMIT fees

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ACER’s decision ensures the intraday capacity calculation methodology of the Core region is aligned with the expected flow-based market coupling

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City Electricity
Intro News
ACER has reached a decision on the first amendment of the intraday capacity calculation methodology of the Core capacity calculation region (Core ID CCM) in cooperation with the region’s NRAs and TSOs.

ACER’s decision ensures the intraday capacity calculation methodology of the Core region is aligned with the expected flow-based market coupling

What is it about?

The EU Agency for the Cooperation of Energy Regulators (ACER) has reached a decision on the first amendment of the intraday capacity calculation methodology of the Core capacity calculation region (Core ID CCM) in cooperation with the region’s National Regulatory Authorities (NRAs) and Transmission System Operators (TSOs).

The Core region comprises 13 Member States: Austria, Belgium, Czech Republic, Croatia, France, Germany, Hungary, Luxemburg, the Netherlands, Poland, Romania, Slovakia and Slovenia.

ACER amended its original Decision 02-2019 so as to enable the harmonisation of the capacity calculation principles at intraday level with the day-ahead capacity calculation methodology of the Core region.

ACER’s new Decision 06-2022 ensures that the application of the intraday capacity calculation methodology of the Core region is aligned with the expected Core Region day-ahead flow-based market coupling. The latter was expected to go live on 20th April but has once again been postponed.

The decision focuses mainly on the intraday transmission capacities in the transitional implementation period of one year. These are residual capacities after the single day-ahead market coupling (SDAC) process.

How did ACER contribute?

In February 2022, the regulatory authorities of the Core region asked ACER to decide on the intraday capacity calculation methodology.

ACER has carried out assessments and consulted relevant stakeholders to take an informed decision on any needed adjustments.

On this basis, ACER has amended the initial proposal of the 1st amendment of the Core ID CCM provided by the Core TSOs so as to further improve the efficiency, transparency and non-discriminatory principles of the intraday capacity calculation process, as well as to ensure its compatibility with day-ahead markets.

Read more on the ACER’s Decision 06-2022 on Core ID CC methodology and its Annexes.