Nuclearelectrica expects to reconnect Cernavoda Unit 1 to the grid on 6 November 2026 after a shutdown of more than three months caused by low Danube water levels. Unit 2 is expected to remain offline until river conditions support both reactors operating at once.
Bulgaria’s storage fleet is estimated at more than 6.2 GW of power capacity and 19 GWh of energy capacity, enough to reshape regional day-ahead prices. By shifting electricity between low- and high-price hours, batteries support exports during scarcity periods while compressing the spreads available to storage projects.
Battery storage can make low-carbon electricity more predictable and usable for Serbian exporters, improving the commercial case for renewable projects. It does not itself reduce embedded emissions or create a CBAM exemption.
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INA’s completed upgrade at its Rijeka refinery increases diesel yield and crude flexibility. The project could strengthen fuel supply and refinery economics across nearby Adriatic markets.
LNG inflows increased in Greece, Croatia and Italy in the week to November 1 compared with Week 43. Italy had the largest volume, while Greece recorded the biggest percentage gain.
Croatia recorded Southeast Europe's largest weekly increase in average day-ahead electricity prices in the week to November 1, despite higher renewable output and lower net imports. Its price premium over Greece widened to €15.88/MWh.
BESS Sibenik, a 60 MW / 120 MWh standalone battery in Croatia, has been commissioned, with HOPS contracting its full capacity for aFRR services since September. The project cost approximately 60 million euros and is designed to earn market-based revenue from storage and ancillary services.
Southeast European electricity prices could ease in Q4 2026 and Q1 2027 if nuclear capacity returns and hydro inflows improve. Gas costs and transmission constraints are expected to sustain premiums during tight periods.
Cernavodă Unit 1 is scheduled to resynchronise on 6 November after more than three months offline. Its availability, alongside other reactor restarts and outages, will shape winter import needs and power prices across Southeast Europe.
Drought is reducing hydroelectric output and constraining nuclear generation across the Balkans, increasing exposure to electricity imports. The pressure highlights the role of diversified generation, storage and interconnection.
Western Balkan electricity trade with the European Union recovered from the second quarter but remained below year-earlier levels. Wider price spreads, weaker convergence and CBAM costs are complicating cross-border sales.
Romania imported electricity for 21 of 24 hours on 3 November despite renewables supplying around two-thirds of generation. Reactor restart prospects and the cost and timing of grid connections will shape supply and new project economics.