For the first time, ACER publishes two reports on energy market surveillance, concerning: persons professionally arranging transactions and national energy regulatory authorities (focusing on their analysis of suspicious transaction and order reports).
The Baltic energy regulators (Estonia, Finland, Latvia, Lithuania, Poland and Sweden) requested from ACER a three-month extension to decide on the capacity calculation methodology for long-term timeframes.
ENTSO-E submitted its proposal for ERAA 2024 for ACER approval in April 2025. ACER will issue its decision in July 2025. ACER also requested ENTSO-E to propose amendments to the ERAA methodology by mid-October 2025.
On 28 April 2025, a large-scale blackout occurred in Spain and Portugal shortly after 12.30 CEST. An expert panel is being set up by ENTSO-E to investigate the incident.
ACER has published its opinion on the amended balancing monitoring plan of the European Network Transmission System Operators for Electricity (ENTSO-E), suggesting more flexible reporting timelines, while stressing the need for improved data quality.
ACER issues today its guidelines to better protect cybersecurity information exchanged under the EU-wide network code on sector-specific rules for cybersecurity aspects of cross-border electricity flows.
In August 2025, ACER has received a proposal from NEMOs to amend the harmonised maximum and minimum clearing price methodologies for the EU day-ahead and intraday market coupling. On 4 January 2026, ACER has approved the proposal.
ACER publishes its Opinion on the Integrated Model report for EU electricity, gas and hydrogen infrastructure planning, submitted in October by ENTSO-E and ENTSOG and prepared with support from ENNOH.
