Greece and Bulgaria stood out in Week 25 by moving against the broader Southeast European market trend, emerging as two of the region’s most important price stabilisers after Türkiye. While electricity prices increased across Hungary, Serbia, Croatia, Romania and Italy, Greece recorded a 6.6% decline to €85.50/MWh, while Bulgaria fell by 6.4% to €87.58/MWh. Their lower price levels reflected stronger domestic supply conditions, improved renewable generation and a greater ability to support regional balances through exports.
Greece delivered one of the strongest renewable energy performances in the region during the week. Total variable renewable generation increased by 18.2%, supported by a 37.5% rise in wind output and an 11.4% increase in solar generation. This additional low-marginal-cost production strengthened the country’s supply position and helped limit price pressure despite growing regional demand. As a result, Greece maintained significantly lower prices than several neighbouring markets that were more exposed to regional scarcity conditions.
Bulgaria followed a different but equally important path. Stronger solar generation compensated for weaker wind production, while the country expanded its role as a regional electricity supplier. Net exports increased by 91.8%, reinforcing Bulgaria’s position as a key exporter within the SEE market. Although hydropower generation declined sharply by 39.4%, the overall supply balance remained sufficiently competitive to prevent prices from following the upward trajectory observed elsewhere in the region.
The significance of these developments extends beyond domestic market performance. Greece and Bulgaria serve as important balancing hubs within the southern and eastern Southeast European electricity corridors. When their prices remain below those of Hungary, Romania, Croatia and Italy, they create opportunities for cross-border trading, export flows and regional arbitrage. While the extent of these opportunities depends on transmission capacity, congestion levels and hourly market conditions, the broader commercial signal remains clear.
Week 25 also highlighted an important reality about renewable energy expansion: increased renewable generation does not lead to a uniform market outcome across all countries. In systems where renewable output aligns effectively with demand patterns and export opportunities, prices can soften and market stability can improve. In contrast, markets that experience strong midday solar production but lack sufficient flexibility during evening hours may still face elevated prices. During Week 25, Greece and Bulgaria were positioned much closer to the first scenario.
For electricity buyers, the lesson is that procurement geography is becoming increasingly important. For traders, the relatively lower-priced Greece-Bulgaria corridor provides a valuable counterbalance to tighter Central European-linked markets. For investors, both countries demonstrate the growing value of combining renewable generation with storage, export capability and cross-border optimisation strategies.
Their performance during Week 25 illustrates that market competitiveness is no longer determined solely by generation volumes. Increasingly, it is shaped by how effectively countries integrate renewable resources, manage flexibility and position themselves within the wider regional electricity network.