ACER publishes a consultancy study aimed at identifying current challenges and areas for improvement in the development of energy scenarios used for long-term infrastructure planning and system adequacy assessments at EU level.
ACER releases two reports assessing whether the proposed reference price methodologies for the Croatian and Finnish natural gas transmission tariffs comply with the EU Network Code on Harmonised Transmission Tariff Structures.
On 11 August 2025, ACER has granted the requested extension by Swedish and Lithuanian regulators. They now have until 12 November 2025 to decide on the cross-zonal risk hedging opportunities at their borders.
On 2 July 2025, ACER received a proposal from all electricity transmission system operators (TSOs) to amend the methodology for intraday cross-zonal gate opening and closure time.
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.
