A 130 MW wind farm in the Western Balkans could lose around €8.9 million over six months if it is unable to access Hungarian electricity prices because it cannot meet the requirements for using actual embedded-emission values under the EU Carbon Border Adjustment Mechanism (CBAM). The estimate highlights how an unresolved compliance issue can translate directly into a material project-finance risk for renewable energy developers.
The Energy Community Secretariat calculated the potential revenue loss by comparing the income generated by a wind farm selling electricity on a domestic, non-EU market with the revenue that the same hourly production profile could have generated on Hungary’s HUPX electricity market, after taking cross-border capacity costs into account. The calculation covers the period from January to June 2026 and is based on the measured generation profile of a neighbouring wind farm, scaled to an installed capacity of 130 MW.
The revenue gap is linked to the conditions that renewable electricity exporters from third countries must meet in order to use actual emission values for CBAM purposes. Among the requirements is certification by an accredited verifier, with the verifier required to receive at least monthly interim reports demonstrating that the relevant compliance conditions have been met.
However, national accreditation bodies only began introducing CBAM verifier programmes during the summer of 2026. The first accredited verifiers were not expected to become available until late 2026 or early 2027. This means that declarants and renewable generators were, in practice, unable to fulfil one of the key requirements during a significant part of the first definitive year of the CBAM system. It also remains unclear whether a verifier appointed at a later stage will be able to certify compliance for 2026 retroactively.
For renewable project developers, the issue extends beyond an immediate loss of revenue. It directly affects the bankability of cross-border merchant exposure. A financial model based on access to higher-priced markets such as Hungary or Italy may have to be replaced with a more conservative domestic-price scenario until the availability of accredited verifiers, PPA eligibility and the required traceability arrangements are confirmed.
The €8.9 million revenue gap in the 130 MW example represents more than €68,000 per installed MW over just six months. For a debt-financed project, such a shortfall could materially weaken debt-service coverage ratios, postpone distributions and reduce equity returns. The effect is particularly significant during the early operating period, when debt-service obligations remain high and construction contingencies may already have been largely exhausted.
Lenders are therefore likely to treat CBAM eligibility as a separate technical and contractual due-diligence issue. Their assessment will need to cover hourly metering, SCADA data integrity, settlement reconciliation, PPA structures, cross-border nominations, the treatment of balancing energy, audit rights and the proposed engagement with an accredited verifier.
Renewable generators, meanwhile, should begin preparing the required evidence on a monthly basis even before formal verification becomes available. A verifier appointed later can only credibly assess historical compliance if the underlying records are complete, consistent and protected against retrospective alteration.
The shortage of accredited CBAM verifiers has effectively created a temporary regulatory barrier between renewable generation and higher-value EU electricity markets. Until that barrier is removed, renewable projects may be technically capable of exporting electricity but commercially restricted to lower-priced domestic markets, creating an additional source of uncertainty for developers, investors and lenders.