An analysis by the Renewable Energy Association of Croatia (OIEH) has highlighted the country’s continued dependence on imported electricity, raising concerns about the resilience of its energy system. Prolonged drought conditions and the declining profitability of fossil-fuel-based power generation have exposed the limited self-sufficiency of Croatia’s electricity network.
During the second quarter of the year, electricity imports made up 17.3% of the country’s total supply. The monthly breakdown shows a growing reliance on foreign electricity: imports accounted for just under 5% in April, increased to nearly 20% in May, and surged to 32% in June. This trend points to heightened vulnerability during the summer season.
Hydropower output, traditionally a cornerstone of Croatia’s energy supply, dropped by 23% compared to the multi-year average. This decline was driven by below-average spring rainfall and diminished snowmelt, both of which typically provide a seasonal boost to hydroelectric generation. At the same time, electricity generation from coal and gas plants fell by more than half (51.6%), mainly due to the temporary closure of the Plomin thermal power plant and economic challenges facing gas-fired units.
Amid these setbacks, other renewable energy sources—such as solar, wind, biomass, and biogas—played a more prominent role, collectively providing nearly 30% of Croatia’s electricity during the period. In response to the situation, OIEH is urging a faster deployment of clean energy projects, along with significant investments in grid upgrades and advanced energy storage systems. These steps are viewed as essential for integrating higher shares of renewables, maintaining grid stability, and shielding consumers from volatile market conditions.
To support strategic planning, OIEH is working with the European Bank for Reconstruction and Development (EBRD), the Hrvoje Požar Energy Institute, and the Faculty of Electrical Engineering and Computing in Zagreb on a study to identify transmission bottlenecks and battery storage needs. The findings will help guide long-term investments aimed at building a more resilient, self-sufficient, and sustainable electricity system for Croatia.
