Recent developments in Southeast Europe (SEE) electricity markets highlight a significant transition towards structural coupling with Central European markets. Data from week 16 reveals a notable narrowing of the price spread between Hungary and Germany, which has decreased to €1.38/MWh. This convergence, the closest observed since August 2025, is largely attributed to an increase in renewable energy generation across SEE rather than enhancements in interconnection capacities.
Simultaneously, imports from the CORE region have dropped to their lowest levels since early 2025, particularly during midday hours when solar energy production peaks in SEE markets. In several instances, there have been reversals in flow direction, with surplus generation being exported to neighboring regions instead of relying on imports.
However, this coupling is not consistent throughout the day. During evening peak hours, as demand surges and renewable output declines, SEE markets still depend on imports, leading to renewed price divergence. This situation reflects a hybrid market structure where market coupling occurs intermittently rather than continuously.
Transmission constraints continue to pose challenges for full integration of SEE markets with the broader European electricity system. Despite some improvements in cross-border capacity, these enhancements remain insufficient to eliminate congestion during critical hours, which significantly impacts price formation and flow patterns.
Furthermore, flows towards Ukraine and Moldova have persisted for 29 consecutive weeks, providing stability during peak demand periods. These exports serve as an additional outlet for excess generation while also helping to mitigate extreme price fluctuations within the region.
The evolving dynamics of electricity flows suggest that SEE markets are gradually moving towards a more integrated framework. However, this integration remains vulnerable to physical limitations and variability in renewable energy output. As such, there are emerging opportunities for cross-border trading strategies that can capitalize on intraday variations in supply and demand.
