Croatia will offer at least 311,468 guarantees of origin through auctions scheduled for 28 July 2026, adding new wind, solar, biomass and biogas certificates to the regional market for documented renewable electricity.
The auctions are being organised by HROTE, ENNA Next and CROPEX. Each guarantee normally represents 1 MWh of electricity generated from a specified source, meaning the announced volumes correspond to more than 311 GWh of renewable production.
HROTE will offer 283,779 certificates associated with electricity supported through Croatia’s incentive system. The portfolio covers wind and biomass generation produced during the second quarter of 2026. These volumes account for approximately 91 per cent of the announced supply.
ENNA Next will sell a further 27,689 certificates covering Croatian wind, solar, biomass and biogas production from March to May, together with certificates from German wind farms produced during April and May. The inclusion of German certificates gives buyers a choice between domestic and imported renewable attributes, although their commercial value may differ depending on customer requirements.
The auctions arrive as guarantees of origin are becoming more important for Croatian suppliers and industrial consumers. Electricity retailers use them to substantiate renewable products, while exporters increasingly require auditable electricity information for corporate reporting, supply-chain questionnaires and carbon-related commercial agreements.
Not all guarantees carry the same value. Technology, country of origin, production month, support status and buyer preference can create substantial price differences. Croatian wind certificates may attract a premium from domestic companies seeking geographically matched claims, while biomass and biogas certificates may appeal to buyers looking for controllable renewable generation rather than intermittent supply.
For industrial companies, certificates remain documentation instruments rather than physical delivery arrangements. A company can purchase guarantees equal to its annual electricity consumption without changing its hourly power supply. That distinction matters for businesses developing more rigorous carbon accounting or negotiating renewable power-purchase agreements.
The stronger commercial model combines metered electricity consumption, supply contracts, guarantees of origin and a clear cancellation process. Large exporters may also require hourly or monthly matching to demonstrate a closer relationship between consumption and renewable generation. Such structures demand better data integration than the annual certificate reconciliation traditionally used by suppliers.
The auction will also provide a useful price signal for the Croatian renewable market. More than 283,000 certificates entering the market in one event could pressure clearing prices, particularly where supply exceeds immediate compliance or voluntary demand. Technology-specific auction design may limit direct competition between wind, biomass and other sources.
For generators receiving regulated support, the sale of certificates creates an additional value stream for the incentive system. For ENNA Next, the multi-technology portfolio provides flexibility to serve different buyer preferences. CROPEX’s role gives the process a transparent trading platform and a formal settlement mechanism.
The volume is modest compared with Croatia’s total electricity consumption, but the auction is commercially relevant for corporate buyers preparing renewable-procurement strategies for the second half of 2026. The market is moving from generic “green electricity” claims towards more detailed evidence covering source, location, production period and certificate ownership.
