Serbia’s forecast power balance on 15 October required about 1,027 MW of net imports, while the SEEPEX price reached 368.6 €/MWh at hour 20. Battery storage could reduce exposure to such expensive deficit hours, but would not remove the need for energy imports.
High gas costs can raise Southeast European electricity prices when weak hydro, low wind or thermal outages leave gas-fired plants setting the marginal price. In tight hours, gas-fired generation can support wholesale prices above €170-220/MWh.
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.
Bulgaria’s transmission system operator ESO has invested more than 182 million euros in network modernisation since the start of 2026. The work includes construction and reconstruction of more than 120 kilometres of transmission lines.
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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.