Combined net electricity imports in Southeast Europe rose by just 0.4% to 1,194.36 GWh in Week 42, despite substantial shifts in national trade positions, according to figures courtesy of Virtu.Energy. The near-steady regional total concealed marked changes between individual markets. Electricity traded across borders became a defining feature of the week’s power market.
Greece increased its net exports by 143.88% to 198.49 GWh, while Serbia’s net imports climbed from 12.16 GWh to 96.58 GWh. Hungarian imports grew by 34.22% to 279.71 GWh, but Bulgaria’s exports fell by 97.8% to just 3.56 GWh. Romania cut net imports by 59.06% to 77.57 GWh, and Croatia reduced its import requirement by 20.65% to 119.57 GWh.
These shifts are increasingly important to the commercial value of power generation. Generators are exposed not only to conditions in their domestic markets, but also to whether electricity can be transferred to neighbouring markets with higher prices. Week 42 showed how cross-border capacity can affect that opportunity.
Price gaps and transmission constraints
Electricity in Greece was considerably cheaper than in Bulgaria, Romania, Serbia and Hungary, while Greece increased its net exports. Large price differences nevertheless persisted, indicating that the regional network could not fully arbitrage them away. The price gaps were particularly visible between Greece and the northern Balkans.
For traders, persistent spreads create value in forecasting congestion and securing cross-border transmission capacity. For transmission operators and policymakers, they indicate where network reinforcement could deliver economic benefits. The differences also have implications for renewable energy developers.
A wind or solar project in a structurally congested zone may face periods of low local prices even when neighbouring markets are expensive. Projects with access to stronger interconnection can potentially sell into a wider regional pool of prices. The commercial value of generation therefore depends in part on the ability to move electricity between markets.
Interconnection and storage in the Western Balkans
This is especially relevant to the Western Balkans. Serbia lies between Central Europe, Romania, Bulgaria, Bosnia and Herzegovina, Montenegro and North Macedonia. Its long-term electricity-market value depends not only on domestic generation additions, but also on how efficiently power can be exchanged with neighbouring systems.
Montenegro also has a strategic role because its transmission system provides the Western Balkans with a direct connection to Italy through the subsea interconnector. The growing importance of cross-border trading also strengthens the commercial case for storage. Storage can reduce reliance on constrained interfaces during expensive hours and absorb imports or domestic renewable surpluses when market and network conditions are more favourable.
Week 42 demonstrated why regional electricity analysis cannot rely on national generation statistics alone. Serbia’s higher imports, Greece’s stronger exports and Bulgaria’s sharply reduced surplus were connected parts of the same regional balance. As renewable penetration increases, these relationships are expected to become more dynamic, with the market increasingly shaped by where and when electricity is produced and whether transmission capacity can deliver it to the market willing to pay the highest price.
Courtesy of Virtu.Energy
