Southeast Europe faces a growing power-system flexibility shortage as grids, storage and dispatchable capacity lag behind project growth and rising volatility. Country-level pressures range from heavy imports in Serbia to negative prices in Croatia and faster battery deployment in Bulgaria.
Bulgaria, Romania, Croatia and Hungary are among more than a dozen EU countries opposing plans to favour electricity through taxation and common rules for grid charges. Governments want flexibility to set tariffs and taxes around domestic conditions.
Serbia’s crude supply chain remains dependent on temporary sanctions authorisations, with the operating window for NIS and corresponding JANAF activities extended to 11 December 2026. Uncertainty persists over MOL’s proposed acquisition of the Russian majority stake in NIS.
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.
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Bulgaria’s operating battery fleet was reported at 6.23 GW by late October, while EBRD and Raiffeisen are financing a new 246 MW battery at Tenevo. The reported fleet and energy-flow figures require verification against underlying data.
Bosnia and Herzegovina’s Southern Interconnection is held up by disputed state property and disagreements over project implementation. While a former BH-Gas director says completion before 2030 looks unlikely, EU-backed efficiency financing is moving through a local bank.
Around 2 GW of battery storage connection agreements were reported in Serbia in 2026, but the first standalone projects still need to establish a local financing template. EMS requires a construction bank guarantee before transmission-connected projects can advance to connection contracts.
North Macedonia is structuring its planned 100 MW / 400 MWh Bitola battery as strategic grid infrastructure, with an estimated cost of EUR 98 million. The EBRD is considering a sovereign-guaranteed loan of up to EUR 33.1 million, alongside other expected financing.
The Scornicesti battery will use non-recourse project finance with InvestEU risk support. Its merchant revenue model comes as Romania’s operational storage fleet expands and competition for market revenues grows.
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.
Southeast Europe faces a growing power-system flexibility shortage as grids, storage and dispatchable capacity lag behind project growth and rising volatility. Country-level pressures range from heavy imports in Serbia to negative prices in Croatia and faster battery deployment in Bulgaria.
Kosovo enters its highest-demand months with the 260 MW B1 unit still unavailable, increasing reliance on electricity imports. The operator has not set a return date as regional prices and interconnector availability remain key variables.
Austria's Verbund has signed a power-purchase agreement for the first project selected in Albania's first wind auction to reach construction readiness. Commercial operation is targeted for the first quarter of 2028.
Bulgaria’s operating battery fleet was reported at 6.23 GW by late October, while EBRD and Raiffeisen are financing a new 246 MW battery at Tenevo. The reported fleet and energy-flow figures require verification against underlying data.
Buyers took 34,000 of 35,000 wind guarantees of origin offered in North Macedonia’s first auction. The sale adds a price-discovery mechanism to the country’s existing administrative framework.