Construction is underway on what is expected to become the largest solar power plant in Croatia and the broader region, as Spanish renewable energy group Acciona advances its Promina project in Šibenik-Knin County. Initial works began in early January, focusing on site clearing and land preparation across the large area designated for the installation.
The project is being developed by Acciona Energia through its Croatian subsidiary on land located in the municipality of Promina. After completion, the solar facility is projected to reach a capacity of 150 MW, making it the biggest solar installation in Croatia and nearby countries. The project timeline targets completion by summer 2027, with total investment estimated at around 120 million euros. Expected annual generation stands at about 274 GWh, sufficient to supply electricity to roughly 69,000 households.
The solar plant will be divided between two locations. The southern site will extend over approximately 162 hectares and host photovoltaic modules with a combined capacity of 90 MW, while the northern site will cover around 122 hectares with an additional 60 MW installed capacity.
Grid connection will be secured through a new 400 kV Promina substation, to be delivered under a turnkey contract awarded to Končar. The deal, worth 15.3 million euros, includes full construction and integration of the substation, which will connect to the existing Konjsko and Velebit substations via a new 400 kV transmission line. This project will represent the first substation of this voltage level built in Croatia since 2004.
