The EU’s Carbon Border Adjustment Mechanism is expected to play a larger role in Southeast European power flows this autumn, as traders compare not only wholesale price spreads but also the carbon-adjusted value of electricity moving from the Western Balkans into the EU. CBAM therefore affects how cross-border transactions are evaluated at the border.
Energy Community monitoring for the second quarter found that Western Balkan contracting parties became net importers of EU electricity overall. Some exports toward EU markets continued on selected corridors. The shift indicates that traditional arbitrage economics are already being disrupted.
Border arbitrage and embedded emissions under CBAM
Before CBAM, a Serbian, Bosnian or Montenegrin exporter could focus primarily on the price difference between its domestic market and Hungary, Croatia or Italy. Under the definitive CBAM regime, EU importers must also account for embedded carbon emissions. This changes the basis for comparing cross-border value.
The mechanism creates a structural disadvantage for lignite-heavy electricity unless actual emissions can be demonstrated and verified at a materially lower level than the applicable default. The effect is expected to become more visible during autumn scarcity events. In that context, a €20-30/MWh wholesale spread may be reduced once CBAM liability for high-carbon generation is included.
Evidence requirements for renewables and hydro exports
Renewable and hydro electricity should theoretically retain stronger export economics, but the Energy Community has warned that renewable producers face practical difficulties proving compliance with requirements for actual emissions. The European Commission’s August guidance reinforces the importance of monitoring, contractual traceability and verification.
The commercial outcome described by market participants is the emergence of two parallel values for Western Balkan electricity. One value is the ordinary domestic or regional wholesale price. The other is the CBAM-adjusted EU netback after carbon and evidence costs.
Implications for producers and autumn trading corridors
This dual pricing framework could influence how EPS, EPCG, ERS, EPBiH and independent producers allocate generation among domestic buyers, EU exports and other non-EU markets. For autumn traders, the key border spread is no longer simply SEEPEX-HUPX or Montenegro-Italy. Instead, it is the wholesale spread after carbon exposure and verification risk are priced in.
