Western Balkan electricity exporters face a challenge in proving the emissions and generating origin of power sold to the European Union, where electricity can pass through several control areas before reaching a buyer. EU mirror statistics recorded 9.84 TWh of gross electricity imports reported from Serbia in 2025, making the country a prominent example of the difficulty of tracing individual megawatt-hours.
Hungary, Romania, Bulgaria and Croatia were the leading destinations for the reported imports. Serbia is both a point of generation and a transit market, while its position in short-term power trading means border figures can include domestic production, bilateral purchases, transit flows and re-exported electricity.
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 separate concepts; treating all electricity imported from Serbia as output from Serbian generating installations would give a misleading picture of regional emissions.
Tracing emissions under CBAM
Electricity is outside the 50-tonne physical-goods exemption under the EU Carbon Border Adjustment Mechanism (CBAM) and is fully exposed from the start of the definitive regime, subject to detailed accounting rules and specific exemptions. The EU allows verified actual-emissions approaches only under demanding conditions involving direct electricity sourcing, contractual and physical matching, and network access.
A portfolio combining hydro, wind, solar, coal and imported power may therefore need a reconciled evidence chain before supporting an installation-specific emissions claim. Renewable guarantees of origin have a separate market function and are not an automatic substitute for evidence required under CBAM.
Serbia’s Ministry of Finance estimated electricity-related exposure of around 21.8 million euros for 2026, using its original baseline in an assessment made in June 2026. The ministry warned that regulatory uncertainty may already be affecting cross-border electricity trade, making unchanged 2025 volumes a weak assumption for estimating future liabilities.
The ministry also examined possible rule changes that could reduce the modeled electricity effect, but said they had not been adopted at the time of its assessment. It said the effect of compliance on electricity-trade volumes would depend on market conditions.
Trading costs and evidence for exporters
For a trader buying lower-cost electricity outside the EU to sell into Hungary or Romania, exchange prices are only one element of the calculation. Border congestion, transmission costs, balancing obligations, carbon certificates and the credit required 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. 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.
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 be lawfully linked to a particular installation and importing declarant, rather than relying only on a country’s average carbon intensity. Serbia’s role 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
