Western Balkan electricity exporters face a challenge proving the emissions and generating origin of power sold into the European Union, with EU mirror statistics recording 9.84 TWh of gross electricity imports reported from Serbia in 2025. Electricity may cross several control areas before reaching a buyer, complicating evidence for a particular megawatt-hour. Hungary, Romania, Bulgaria and Croatia were the leading destinations for the reported imports.
Serbia is both a generator and a transit market, and figures recorded at its borders can reflect domestic production, bilateral purchases, transit flows and re-exported power. Power generated in Montenegro, Bosnia and Herzegovina, North Macedonia or Albania can enter wholesale positions and cross-border schedules involving Serbia before delivery to an EU market.
A physical flow, the contractual seller and customs origin are distinct concepts. Attributing all electricity imported from Serbia to Serbian generating installations would give a misleading picture of the region’s carbon burden. A portfolio combining hydro, wind, solar, coal and imported power may need a reconciled evidence chain to support an installation-specific emissions claim.
CBAM evidence and exposure
In June 2026, Serbia’s Ministry of Finance estimated electricity-related exposure of 21.8 million euros for 2026, using its original baseline. The ministry warned that regulatory uncertainty may already be affecting cross-border electricity trade, making unchanged 2025 volumes a weak assumption for future liabilities.
The ministry examined possible rule changes that could reduce the modeled electricity effect, but said they had not been adopted at the time of its assessment. The effect of compliance on electricity-trade volumes will depend on market conditions.
Electricity is outside the 50-tonne physical-goods exemption under the EU Carbon Border Adjustment Mechanism (CBAM) and is fully exposed from the beginning of the definitive regime, subject to detailed accounting rules and specific exemptions. The EU permits verified actual-emissions approaches only under demanding conditions involving direct electricity sourcing, contractual and physical matching, and network access.
Renewable guarantees of origin have a separate market function and are not an automatic substitute for evidence required under CBAM. Installation-level metering, clear asset ownership, power-purchase contracts, hourly schedules, identification of the EU importer and controlled allocation of environmental attributes can reduce disputes.
Trading costs and export prospects
A trader buying lower-cost electricity outside the EU to sell into Hungary or Romania must account for more than exchange prices. Border congestion, transmission costs, balancing obligations, carbon certificates and the credit needed to hold positions can eliminate otherwise positive trading spreads, particularly during hours when EU solar or wind output lowers domestic electricity prices.
Regional renewable developers can build export opportunities around a verifiable evidence chain rather than a generic green claim. The same records may help bank lenders assess long-term contracted revenue, although the legal route to recognition of actual emissions requires case-specific confirmation.
The central regional policy question is whether a particular megawatt-hour can lawfully be linked to a particular installation and importing CBAM declarant, rather than relying only on a country’s average carbon intensity. Serbia’s position as both a producer and transit market makes the distinction between physical flows, contractual arrangements and customs origin central to a credible Western Balkan electricity-export strategy.
Elevated by CBAM.Clarion Engineer