Southeast Europe’s electricity market is increasingly shaped by cross-border flow volatility, with price spreads, renewable variability and import dependence affecting regional trading value. Week 23 data points to wider dispersion between markets alongside changes in supply and demand patterns. Net imports across the region rose 9.1% week on week to 1.22 TWh.
Week 23 import changes across SEE
Hungary recorded the largest increase in net imports, rising 64.7% week on week to 179.75 GWh. Romania increased imports by 34.0%, while Croatia raised imports by 18.5%. Italy remained the region’s largest importer at 950.91 GWh, despite reducing imports by 14.1%.
The shifts occurred during a period of strong regional stress, with demand up 8.2%. Variable renewables fell by 8.9%, while wind output dropped 15.5%. Thermal generation increased by 24.5%. In this setting, interconnectors were used as balancing tools.
Price spreads and trading conditions
Price spreads stayed wide enough to support trading activity across the region. Italy averaged €128.09/MWh, while Greece was at €89.25/MWh. Several Balkan markets clustered around €100/MWh, reflecting persistent differences between nodes and bidding areas. Access to capacity, forecasting tools and scheduling capability determined which participants could act on those gaps.
The trading market extended beyond day-ahead arbitrage into intraday adjustments and operational measures. It included congestion management, transmission rights, balancing positions and portfolio optimisation. As renewables grow, forecast errors and hourly price shifts become more relevant for managing exposures and schedules.
Export positions and optionality across borders
Greece and Türkiye remained net exporters during Week 23, although their exports fell. Their export positions can influence neighbouring markets when transmission capacity allows lower-priced supply to flow outward. At the same time, persistent price divergence indicated that physical constraints and market rules continued to limit full convergence between areas.
For traders, the core value is optionality tied to cross-border movements and intraday re-optimisation. The ability to shift power from a lower-priced node to a higher-priced market, or adjust positions when wind or solar forecasts change, can generate value under volatile conditions. For generators, export optionality supports realised revenue outcomes, while industrial buyers can use cross-border procurement to reduce cost exposure.
Data and system requirements for volatile flows
The developments also point to a role for data, forecasting and trading systems in managing cross-border variability. Market participants need accurate renewable forecasts, demand models, interconnector capacity monitoring and price-spread analytics to operate effectively during changing conditions. In a volatile SEE market, information speed becomes a factor linked to financial outcomes for scheduling and trading decisions.
Week 23 reinforced that cross-border trading is no longer limited to a secondary function within regional operations. It is becoming part of the region’s core market architecture as demand rises, renewables fluctuate and price spreads persist alongside flow volatility.
Elevated by energy.clarion.engineer
