Recent trading patterns in Southeast Europe (SEE) indicate a significant shift in cross-border electricity flows, highlighting a trend towards fragmentation within the region’s energy market. The data from April reveals a decline in trading volumes and alterations in directional balances, suggesting that the integration of the regional market is gradually weakening.
Historically, the SEE markets have depended on price arbitrage to facilitate electricity exchanges, with lower-cost generation from the Western Balkans typically flowing to higher-priced markets in the European Union, such as Italy, Austria, and Hungary. However, in April, this established mechanism experienced considerable disruption. Despite persistent price differentials averaging between €25–30/MWh between Western Balkan markets and adjacent EU zones, export flows did not adjust accordingly.
A notable indicator of this change was the reduction in electricity exports to Italy, which saw an average decline of approximately −333 MW. This drop points to diminished arbitrage efficiency. Conversely, there was a modest increase in exports to Ukraine and Moldova, indicating a shift towards eastern demand centers away from traditional EU-bound flows.
The introduction of carbon-related adjustments on cross-border electricity trade has emerged as a key structural driver behind these shifts. New carbon cost mechanisms have altered the economic landscape for exports by imposing additional charges on electricity entering EU markets. These costs are based on standardized emission assumptions rather than actual generation profiles, leading to competitive distortions.
This regulatory environment has resulted in reduced access for electricity generated from low-cost but carbon-intensive sources in the Western Balkans to EU markets, even when price spreads remain favorable. Furthermore, the current system does not adequately distinguish between clean and fossil-based generation in neighboring countries, which has unintended consequences for renewable energy exports as well.
The immediate impact of these developments has been a notable decline in overall cross-border trading activity, estimated at around −25% compared to previous periods. This trend signifies a breakdown of traditional market coupling dynamics and poses particular challenges for export-oriented systems like Montenegro and Bosnia and Herzegovina, where cross-border sales are critical for revenue generation.
On the other hand, internal flows within SEE have become more pronounced. Exchanges among Balkan countries—such as Serbia, Bosnia, North Macedonia, and Albania—remain active due to geographical proximity and aligned regulatory frameworks. However, these internal exchanges are smaller in scale and less capable of absorbing surplus generation during peak output periods.
This fragmentation introduces several systemic risks. Reduced integration with EU markets limits SEE systems’ ability to export excess renewable generation, increasing the likelihood of curtailment. Additionally, it diminishes access to cheaper imports during tight supply periods, potentially leading to increased market volatility.
Looking forward, the future trajectory of cross-border flows will largely depend on regulatory alignment across the region. Without mechanisms that accurately reflect actual carbon intensity and foster deeper integration of SEE markets into EU frameworks, there is a risk that the region could evolve into a semi-isolated trading zone characterized by lower liquidity and heightened price volatility.
