Serbia’s electricity system is taking on a more important regional role as commercial power flows increasingly move northwards towards Hungary and, potentially, onwards to Ukraine.
Scheduled electricity exports from Serbia to Hungary increased 111% year on year in the second quarter of 2026, reaching approximately 788 GWh, compared with 374 GWh a year earlier. The increase came even as total Western Balkan exports to the EU fell by 16% and overall regional electricity exchange contracted.
The strengthening of the Serbia–Hungary corridor cannot be explained by the bilateral price spread alone. Hungary’s average day-ahead price was around €12.9/MWh higher than Serbia’s, significantly below the approximately €33/MWh spread recorded in the first quarter. Serbia also carries a national CBAM default emission factor of 1.041 tCO₂/MWh, implying an estimated carbon cost of €78.37/MWh at the Q2 certificate price.
A broader regional demand centre appears to be driving the flow. Hungary was the most important route for Ukrainian electricity imports during the quarter. Around 1,546 GWh of transmission capacity was allocated through daily Hungary–Ukraine auctions, approximately 247% more than in Q2 2025. The auctions generated around €12.5 million, while offered capacity was almost fully allocated.
The Energy Community Secretariat considers the connection provisional because transit volumes cannot be separated from aggregate commercial schedules. The wider regional flow pattern nevertheless supports this interpretation. Romania-to-Hungary schedules increased 156%, while electricity flows within the Western Balkans increasingly moved northwards towards Serbia. Montenegro-to-Serbia flows rose 56%, North Macedonia-to-Serbia increased 46%, Albania-to-Kosovo climbed 153%, and Kosovo-to-North Macedonia rose 110%.
Serbia is therefore functioning as more than a domestic coal-based electricity market. It is increasingly becoming a commercial collection point for electricity flowing from the hydro-rich and renewable-rich southern Balkans towards the Hungarian border.
This development increases the strategic importance of Serbia’s transmission infrastructure. Rising northbound flows place greater emphasis on the 400 kV and 220 kV networks, cross-border capacity optimisation, phase-angle management, forecasting and balancing. They also increase exposure to congestion costs and unplanned physical flows across the interconnected regional grid.
The recovery in SEEPEX trading activity is consistent with this emerging role. Day-ahead volumes on the Serbian power exchange increased 7% after contracting in Q1. Greater trading activity through Serbia can improve market liquidity and price discovery, but the full commercial value of the corridor depends on sufficient transmission capacity, transparent capacity auctions and a grid capable of accommodating both scheduled transactions and physical loop flows.
The corridor also creates opportunities for battery energy storage and flexible generation. Traders serving demand in Hungary and Ukraine require short-term portfolio balancing, intraday flexibility and reserve capacity. Serbia’s hydropower assets, thermal generation fleet and future BESS capacity could support these functions, although increasing carbon exposure will determine which generation sources can competitively access premium EU demand.
Serbia’s position is therefore commercially valuable but operationally demanding. The country can strengthen its role as a regional electricity transit and balancing hub only if grid reinforcement keeps pace with growing northbound flows. Q2 data indicate that the market has already begun assigning Serbia that role.
