Serbian renewable electricity producers can continue selling power into the European Union under the EU Carbon Border Adjustment Mechanism (CBAM), but favourable carbon treatment increasingly depends on whether exporters can prove the origin of each delivered megawatt-hour. The documentation requirement applies to the electricity declared at the EU border. CBAM separates the physical value of generation from its regulatory treatment in cross-border trade.
Serbia is positioned as a key potential platform for renewable electricity exports into the EU within the Western Balkan system. The country has connections towards Hungary, Romania, Bulgaria, North Macedonia, Kosovo, Montenegro, and Bosnia and Herzegovina. Its liquid domestic market and growing renewable portfolio are cited alongside its direct border with Hungary as factors supporting export capability.
CBAM default factor for Serbian electricity without verified embedded emissions
Under CBAM, unless an importer can meet conditions for using actual embedded emissions, Serbian electricity is subject to a national default factor of 1.041 tonnes of CO₂ per MWh. At the Q2 2026 certificate price of €75.28 per tonne, this default implies an indicative liability of approximately €78.37 per MWh. The charge reflects Serbia’s coal-intensive national generation mix rather than emissions from a specific wind, solar or hydropower plant.
The default approach affects how renewable exports are treated at the EU border when evidence is incomplete. A wind farm may produce electricity with minimal operating emissions, but an EU buyer could still face the national default charge if contractual, metering and cross-border documentation does not establish actual emissions. The financial impact is described as potentially exceeding price spreads available on trading routes.
During Q2 2026, Hungarian day-ahead electricity averaged approximately €13/MWh above Serbia. A potential CBAM charge of more than €78/MWh would be larger than that margin, according to the figures provided. This would affect the commercial viability of conventional export structures.
Exports to Hungary rise while CBAM changes transaction calculations
Despite the documentation requirements, scheduled exports from Serbia to Hungary increased 111% year on year in Q2 2026. The growth is attributed in part to stronger demand linked to Ukraine and to increased use of Hungary as a northern trading hub. The increase is also presented as evidence that electricity trading continues under CBAM.
The change described is not a halt in trade but a shift in how each transaction is calculated for carbon exposure. Route, origin, contractual structure and expected carbon treatment are identified as elements affecting how CBAM applies at the point of declaration. Export activity therefore continues while compliance depends on evidence quality for each delivery.
Serbia expands wind and solar capacity linked to export readiness
Serbia’s renewable base is expanding, with combined wind and solar capacity rising from 647 MW to 908 MW during the year to September 2025, based on government data. Solar capacity increased from 137 MW to approximately 300 MW, while wind remained the larger technology category. These figures indicate growth in generation available for domestic use and cross-border sales.
Elektroprivreda Srbije (EPS) has also added renewables at its Kostolac mining and power complex. The 66 MW Kostolac wind farm, built across Drmno, Petka, Ćirikovac and Klenovnik sites, was designed to produce approximately 187 GWh annually. The project received support including a €110 million KfW loan and an additional €30 million EU grant through the Western Balkans Investment Framework.
A nearby 9.75 MW Petka solar power plant has projected annual production of approximately 13.7 GWh. Both projects are described as using former mining or industrial land within EPS’s generation portfolio. The portfolio remains dominated by lignite and large hydropower according to the source figures.
Lignite’s role in default CBAM treatment and proposed regulatory amendments
The documentation challenge is linked to Serbia’s lignite generation shaping default CBAM outcomes. Coal-fired production fell 12% year on year to 6.54 TWh in Q2 2026, but lignite remained described as the principal source of domestic power. Until the generation mix changes substantially or methodology is revised by the EU, exporters unable to prove actual emissions remain exposed to a default value reflecting wider system output.
The European Commission has proposed amendments that could alter how electricity defaults are calculated for CBAM purposes. The proposal would use the entire national generation mix, including hydropower, wind and solar, rather than focusing predominantly on fossil-fuel generation. It is expected that this would produce a lower and more representative fallback value for Serbian electricity if adopted.
The proposed rules would also remove two obstacles identified under current arrangements: a requirement for direct grid connection to the EU and an absence of congestion along the delivery route. Neither condition is described as reflecting operational realities in interconnected markets where congestion cannot be controlled across multiple borders by generators.
Evidencing actual emissions: guarantees of origin and contractual chains
The amendments remain under negotiation and are not settled law, so Serbian producers and traders are not expected to assume automatic zero-emissions treatment for renewables. A guarantee of origin confirms renewable attributes but does not by itself satisfy CBAM requirements for embedded emissions treatment at the border. CBAM requires a broader connection between generating installation output, produced volume, contractual transaction details and imported electricity volumes into the EU.
The evidence set described can include hourly production data, calibrated metering records, PPA volumes, trading confirmations, cross-border capacity documentation, delivery schedules and records showing how balancing differences were treated. Electricity exports can continue while being accompanied by CBAM evidence packages covering both source electricity and embedded emissions.
The authorised CBAM declarant or EU importer remains formally responsible for declaration and eventual surrender of CBAM certificates. Plant-level production, metering and emissions information sit with the Serbian producer, while contractual and delivery records may be held across multiple parties including exporter, trader and transmission-capacity holder. This distribution means operational compliance requirements must be shared across supply-chain participants through contract terms.
Pre-verification for export structures involving intermediaries
The need for coordination extends to how evidence packages are prepared and corrected when inconsistencies arise. Contracts are described as needing clarity on which party prepares evidence materials, who provides access to original records, how discrepancies are corrected, who pays verification costs and how financial liability is allocated if actual emissions are rejected.
Virtu.Energy analysts recommend integrating a pre-verification process before annual declarations are prepared. Waiting until annual submission is described as creating risk where missing hourly data or incomplete contractual records cannot be corrected later due to inconsistencies between generation and delivery.
The pre-verification step would test whether an export structure can meet CBAM requirements before or during delivery. It would examine generating installations, metering arrangements, contractual chain elements, nomination procedures, transmission route details and information available to the EU importer.
Multi-border flows require volume reconciliation under CBAM controls
The process is described as particularly important when Serbian electricity is sold through several intermediaries because each transfer can weaken documentation links between generator and ultimate EU importer. Multi-border exports add further complexity since physical flows recorded by transmission operators may differ from contractual schedules due to network conditions rather than commercial routing choices.
For CBAM purposes, exporters must demonstrate qualifying contractual and delivery relationships without claiming that identical renewable production was allocated to multiple buyers. Volume reconciliation and hourly matching are identified as central controls under these conditions for cross-border deliveries into multiple zones.
Technology-specific economics: wind output example and solar pricing constraints
The economics provided include an example of a 100 MW Serbian wind farm operating at a 35% capacity factor, producing approximately 307 GWh annually. A CBAM-related price discount of only €10/MWh would reduce annual revenue by more than €3 million. Exposure linked to Serbia’s full default charge is described as substantially larger than operating margins typical for renewable projects.
Solar exports face different commercial conditions because Serbian solar production occurs during midday hours when regional prices can be low or negative. Storage arrangements shaped by PPAs and portfolio aggregation are cited as potential ways to increase value for exported solar electricity. Each additional contractual component must remain consistent with the CBAM evidence chain described in the source material.