Serbia’s Renewable Power Exports Face Stricter CBAM Documentation Requirements

Serbia’s renewable electricity producers can continue exporting power to the European Union under the Carbon Border Adjustment Mechanism (CBAM), but securing favourable carbon treatment increasingly depends on proving the origin and delivery of each megawatt-hour.

Serbia has electricity links with Hungary, Romania, Bulgaria, North Macedonia, Kosovo, Montenegro, and Bosnia and Herzegovina, positioning the country at the centre of the Western Balkan power system. Its domestic electricity market, expanding renewable fleet and direct connection with Hungary also give it a potential role as a platform for renewable electricity exports to the EU. CBAM nevertheless separates the physical characteristics of renewable generation from the carbon treatment applied at the EU border. Where an importer cannot satisfy the requirements 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 CBAM certificate price of €75.28 per tonne, that factor corresponds to an indicative cost of approximately €78.37/MWh. The calculation reflects Serbia’s national generation mix rather than the operating emissions of an individual wind, solar or hydropower facility.

CBAM exposure can outweigh cross-border price spreads

The distinction has direct commercial consequences for renewable generators. A Serbian wind farm can have minimal operating emissions while its EU buyer remains exposed to the national default charge if the contractual, metering and cross-border evidence does not establish actual emissions. During Q2 2026, Hungarian day-ahead electricity prices averaged about €13/MWh above Serbian prices. A potential CBAM cost exceeding €78/MWh would therefore be substantially larger than that trading spread.

Despite the carbon-cost exposure, scheduled electricity exports from Serbia to Hungary rose 111% year on year in Q2 2026. Part of the increase was associated with stronger demand linked to Ukraine and Hungary’s growing role as a northern trading hub. The increase demonstrates that CBAM has not prevented electricity trading. Instead, it has introduced additional considerations concerning the origin of electricity, contractual arrangements, trading routes and potential carbon liabilities.

Renewable generation base continues to expand

Serbia’s renewable capacity is also increasing. Government data show that combined wind and solar capacity rose from 647 MW to 908 MW in the year to September 2025. Solar capacity more than doubled over the period, increasing from 137 MW to approximately 300 MW, while wind remained the larger technology.

Elektroprivreda Srbije (EPS) has expanded renewable generation at its Kostolac mining and power complex. Its 66 MW Kostolac wind farm, spanning the Drmno, Petka, Ćirikovac and Klenovnik sites, was designed for annual production of approximately 187 GWh. The project received support through a €110 million KfW loan and an additional €30 million EU grant under the Western Balkans Investment Framework. The nearby 9.75 MW Petka solar power plant has projected annual generation of approximately 13.7 GWh. Both projects are located on former mining or industrial land, allowing EPS to develop renewable generation within a portfolio that remains dominated by lignite and large hydropower.

Actual-emissions claims require detailed evidence

Private wind projects, solar developments and capacity supported through auctions are expanding the renewable market beyond EPS. The resulting requirement is not limited to building additional generation but also involves establishing the trading and verification framework needed to preserve the low-carbon characteristics of electricity after it enters wholesale markets.

Serbia’s lignite generation continues to influence its default CBAM treatment. Coal-fired generation declined 12% year on year to 6.54 TWh in Q2 2026, but lignite remained the country’s principal electricity source. Until the generation mix changes substantially or the EU methodology is revised, electricity exporters unable to demonstrate actual emissions remain exposed to a default value based on the broader Serbian power system.

For an actual-emissions claim, renewable status alone is insufficient. Evidence can include hourly production data, calibrated metering records, PPA volumes, trading confirmations, cross-border capacity documentation, delivery schedules and records showing the treatment of balancing differences. The documentation must establish the relationship between the generating installation, electricity produced, contractual transaction and electricity imported into the EU.

Proposed EU changes could alter default calculations

Proposed amendments to the CBAM Regulation could change the treatment of Serbian electricity. The European Commission has proposed calculating electricity default values using the entire national generation mix, including hydropower, wind and solar, rather than concentrating predominantly on fossil-fuel generation. The proposed approach would produce a lower and more representative fallback value for Serbian electricity. The proposals would also remove two conditions affecting the use of actual emissions: a requirement for a direct grid connection to the EU and a requirement related to the absence of congestion along the delivery route.

These conditions do not necessarily correspond with the operation of interconnected electricity markets, where physical electricity flows can cross multiple borders and generators cannot control congestion throughout the network. The proposed amendments could also allow physical PPAs executed through intermediaries, provided a verifiable contractual chain connects the generator, trader and EU importer. Firm nomination requirements would be limited to borders where capacity is explicitly allocated, addressing transactions carried out through market coupling. The amendments remain under negotiation and are not yet settled law.

Guarantees of origin do not replace CBAM evidence

Serbian renewable producers and traders therefore cannot assume that renewable generation, a guarantee of origin or a corporate PPA alone will provide zero-emissions treatment under CBAM. A guarantee of origin (GO) establishes the renewable attribute of electricity but does not replace the physical PPA, hourly metering, cross-border nominations and verification required for an actual-emissions claim. This distinction is also relevant to a proposal by the European Commission for mutual recognition of renewable GOs between EU member states and qualifying Energy Community Contracting Parties.

The proposal could expand the European certificate market for Serbian renewable producers, subject to Serbia meeting the applicable regulatory and technical requirements. For exporters, electricity can therefore carry several separate forms of commercial value: wholesale electricity revenue, contracted PPA revenue, renewable-attribute value through GOs, flexibility value from storage and the value associated with a verification-ready CBAM evidence chain.

Export contracts need defined compliance responsibilities

The authorised CBAM declarant or EU importer remains responsible for the declaration and eventual surrender of CBAM certificates. The importer cannot complete the process independently, however. Plant-level production, metering and emissions data are held by the Serbian generator, while contractual and delivery information can be distributed among the producer, exporter, trader and transmission-capacity holder. Compliance requirements consequently extend across the electricity supply chain. Contracts need to establish who prepares the evidence package, who provides original records, how discrepancies are corrected, who covers verification costs and how financial liability is allocated if actual emissions are rejected.

Analysts at Virtu.Energy, a CBAM electricity-focused engineering platform, say a pre-verification process is highly recommended and should begin now. Such a process can assess the generating facility, metering system, contractual chain, nomination procedures, transmission route and information available to the EU importer before or during delivery. Early verification can also identify missing hourly data, incomplete contracts or inconsistencies between generation and delivery while they can still be addressed.

Multi-party and multi-border transactions add complexity

The issue becomes more complicated where Serbian electricity is sold through several intermediaries. Each additional transfer can weaken the documentary connection between the renewable generator and the final EU importer unless the contractual structure preserves that link. Cross-border transactions create another challenge. Serbian renewable electricity can reach the EU through Hungary, Romania, Bulgaria or Croatia-related routes, or be traded commercially through several regional electricity zones before entering the EU.

Physical electricity flows recorded by transmission system operators can differ from commercial schedules because electricity follows network conditions rather than contractual trading routes. For CBAM purposes, exporters must demonstrate the qualifying contractual and delivery relationship while avoiding allocation of the same renewable generation to multiple buyers. This makes volume reconciliation and hourly matching important controls for export transactions.

Revenue exposure differs by renewable technology

The financial impact can be significant. A 100 MW Serbian wind farm operating at a 35% capacity factor could generate approximately 307 GWh annually. A CBAM-related price discount of only €10/MWh would reduce annual revenue by more than €3 million. Exposure to the full Serbian default charge would be substantially greater than the operating margin of most renewable projects. Solar generation has a different commercial profile because Serbian solar output is concentrated during increasingly competitive midday periods, when regional electricity prices can be low or negative.

Storage, structured PPAs and portfolio aggregation can increase the commercial value of exported solar electricity, although each additional contractual element must remain consistent with the CBAM evidence chain. Wind generation can have greater export value during winter, evening and lower-solar periods, while its variability increases balancing requirements. Hydropower provides another flexibility option because reservoir facilities can shift production toward higher-priced periods and provide balancing services. The different operating characteristics mean wind, solar and hydropower projects require distinct delivery and verification arrangements.

Domestic liquidity remains relevant to export strategy

Serbia’s domestic electricity market continues to provide an alternative trading channel. Day-ahead volume on SEEPEX increased 7% year on year in Q2 2026, while combined trading across the four observed Western Balkan exchanges increased 19% to 2.70 TWh. Greater domestic market liquidity provides renewable producers with additional trading options, but electricity sold anonymously into a wholesale pool can be more difficult to associate with a particular EU import transaction.

This increases the relevance of renewable projects with robust metering systems, auditable production records and contracts structured around CBAM requirements from the beginning. Serbia’s growing exports toward Hungary are strengthening its regional electricity-trading role, while the expansion of wind, solar and other renewable capacity is increasing the volume of electricity that could potentially enter EU markets. For Serbian renewable producers, the commercial value of exports will therefore depend not only on generation costs and cross-border transmission capacity, but also on the ability to maintain a verifiable chain connecting the generating facility with the electricity declared at the EU border.