ACER report to the Energy Union Task Force on recommendations to mitigate future periods of price spikes in Southeast Europe, by increasing cross-zonal capacity and system flexibility in the region.

Data items

Name Reference Source Identifier
Active network elements in Core flow-based market coupling during the evening peaks – July to September 2024 Figure 09 ACER calculation based on JAO Publication Tool data
Actual activation of curative remedial actions in Core capacity calculation per Core TSO – 2023 to 2025 Figure 28 ACER calculation based on JAO Publication Tool
Adoption of time-varying retail contracts among households across the EU and Norway – 2024 (% of total household consumers) Figure 33 ACER calculation based on NRA data
Average allowable temporary increase of Fmax and number of CNEs affected by curative remedial actions per Core TSO – 2025 (% over permanent thermal limit) Figure 29 ACER calculation based on JAO Publication Tool
Average day-ahead prices in selected bidding zones in Central and Southeast Europe at 19:00 CEST – July to September 2024 (EUR/MWh) Figure 01 ACER calculation based on ENTSO-E Transparency Platform data
Average hourly day-ahead price and solar generation for Member States in Southeast Europe during summer months – July to September 2020 to 2025 Figure 05 ACER calculation based on ENTSO-E Transparency Platform data
Average hourly day-ahead price in a selection of bidding zones in Central and Southeast Europe – July to September 2024 (EUR/MWh) Figure 02 ACER calculation based on ENTSO-E Transparency Platform data
Average level of implementation of the 70% requirement in the Core CCR per Member State, considering flows induced by third-country exchanges – 2022 to 2024 Figure 22 ACER calculation based on TSO data
Average load and generation pattern in Hungary during summer months of 2024 – July to September 2024 Figure 08 ACER calculation based on ENTSO-E Transparency Platform data
Average price spreads in the single day-ahead coupling during peak hours of the summer months of 2024 - July to September 2024 at 19:00 and 20:00 CEST Figure 11 ACER calculation based on ENTSO-E Transparency Platform
Comparison between number of distinct Fmax values (logarithmic scale) and relative difference between the lowest and highest Fmax value, per Core CNE - 2025 (%) Figure 17 ACER calculation based on JAO Publication Tool data
Comparison of average daily load profile in Southeast Europe during the summer months of 2023, 2024 and 2025 Figure 07 ACER calculation based on ENTSO-E Transparency Platform data
Count of instances of day-ahead prices above 400 EUR/MWh in select EU bidding zones, compared with the counterfactual analysis – July to September 2024 Figure 24 ACER calculation based on Simulation Facility
Day-ahead net cross-zonal exchanges between the EU and UA, WB6, TR and MD during summer months - July to September 2021 to 2025 (TWh) Figure 12 ACER calculation based on ENTSO-E Transparency Platform data
Evolution of installed capacity of selected technologies in Southeast Europe – 2020 to 2025 (GW) Figure 04 ACER calculation based on ENTSO-E Transparency Platform data
Example of implementation of dynamic line rating in capacity calculation on network element ‘Hradec - Mirovka’ Figure 14 ACER calculation based on JAO Publication Tool data
Impact of ATC extraction from flow-based domains in the Nordic CCR, compared to ATC leftovers prior to the implementation of flow-based market coupling in day-ahead – 2023 to 2024 Figure 37 ACER calculation based on ENTSO-E Transparency Platform data
Impact on average Fmax of upgrading the conductor of cross-border line between Belgium and France ‘Avelgem - Avelin’ – 2022 (MW) Figure 20 ACER calculation based on JAO Publication Tool data
Minimum requirements for cross-zonal trade in the Core CCR per Member State – 2024 Figure 23 ACER calculation based on TSO data
Overview of available non-costly remedial actions in Core capacity calculation per Core TSO based on Core Static Grid Model Figure 27 ACER calculation based on Core Static Grid Model
Overview of dynamic line rating use in capacity calculation per Core TSO - 2024 (% of CNEs) Figure 16 ACER calculation based on JAO Publication Tool data
Smart meter roll-out across Southeast Europe – 2024 (% of household and non-household consumers) Figure 35 ACER calculation based on NRA data
Two-week rolling average of the maximum possible bilateral exchange and price spread on the Austria-Hungary bidding zone border at 19:00 – 2024 Figure 10 ACER calculation based on JAO Publication Tool and ENSTO-E TP data
Unavailability of cross-border lines reducing cross-border capacity in the bidding zone border between Austria and Hungary during the summer of 2024 – July to September 2024 Figure 32 ACER elaboration based on ENTSO-E Transparency Platform
Uptake of time-of-use network tariffs for the transmission and distribution networks across the EU and Norway in 2024 Figure 34 ACER calculation based on NRA data
Usage of dynamic line rating in Core capacity calculation on network elements limiting crosszonal trade - 2024 (EUR/MW) Figure 15 ACER calculation based on JAO Publication Tool data
Year-on-year changes in electricity generation in Southeast Europe between the summer of 2023 and 2024, categorised by generation technology Figure 06 ACER calculation based on ENTSO-E Transparency Platform data
Yearly changes in installed capacity of selected technologies in Southeast Europe – 2020 to 2025 (GW) Figure 03 ACER calculation based on ENTSO-E Transparency Platform data