Serbian renewable projects selling electricity to EU buyers may face added revenue risk from the quality of their cross-border delivery records, after the European Commission issued customs guidance on 6 November. The guidance clarifies how nominated volumes are used in customs declarations involving explicitly allocated transmission capacity, without changing the emissions methodology for imported electricity.
For lenders, the central question is whether a project can realise the electricity price assumed in its financial model. The Commission’s guidance highlights the need to identify the EU importer and preserve supporting records, making the evidence behind a transaction relevant to its CBAM treatment.
A Serbian wind or solar plant can have a strong resource, an operational grid connection and a signed power purchase agreement, yet still face uncertainty over the treatment of electricity delivered to an EU buyer. That uncertainty matters where the PPA’s economics depend on the buyer being able to use verified actual emissions.
If a transaction does not meet the relevant eligibility conditions, the importer may have to use Serbia’s default factor of 1.041 tCO2/MWh. Combined with the third-quarter 2026 CBAM certificate price of 82.32 euros per tonne, that factor implies an indicative unadjusted carbon amount of 85.70 euros/MWh.
The 85.70 euros/MWh amount is not a fixed charge on every Serbian renewable electricity export. It illustrates the potential difference between a qualifying low-emissions transaction and one assessed using the default factor; the contract determines which party bears the financial difference.
An EU buyer may be responsible for CBAM compliance, while a Serbian generator could face a lower realised electricity price, a disputed warranty or reduced demand if the assumed treatment cannot be substantiated. Lenders therefore need to distinguish ordinary electricity offtake from agreements priced to reflect an expected CBAM advantage.
Contracts and delivery records
A PPA that incorporates an expected CBAM advantage needs provisions for data access, metering, nomination records, verifier cooperation and responsibility if evidence is missing or a claim is rejected. Those terms can affect whether the expected export revenue is supported by records that the buyer can use.
Technical due diligence should test whether settlement meters and SCADA systems can produce complete hourly records, whether generation can be allocated to specific contract volumes, and whether the relevant cross-border nominations can be obtained from the parties that control them.
Legal and commercial reviews should identify the transmission-capacity holder, the party submitting nominations and the authorised EU CBAM declarant. They should also establish whether the PPA remains bankable if an intermediary changes or the buyer can no longer use actual emissions.
Stress-testing project revenues
Lenders should test a downside case using a lower export price or an alternative domestic route to market, without assuming the full CBAM-related premium. Carbon prices, transmission costs, balancing exposure and the availability of eligible import arrangements should be stress-tested together.
Not every Serbian renewable project faces this issue: domestic sales and export arrangements that do not rely on plant-specific CBAM treatment carry different risks. Additional diligence matters most when EU-linked revenues support debt service or a higher project valuation.
For projects that rely on EU-linked revenues, CBAM readiness is becoming part of revenue due diligence rather than a separate environmental certification exercise. The bankable asset is not only the generating plant, but also a reliable contractual and data chain connecting its output to the EU buyer.
