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 approved the proposal from the EU TSOs to amend the methodology for intraday cross-zonal gate opening and closure time, with several clarifications and adjustments.
On 17 December 2025, the European Network of Transmission System Operators for Electricity (ENTSO-E) submitted its proposal for the European Resource Adequacy Assessment (ERAA) 2025 to ACER.
