Serbia’s power market signalled a change in cross-border flows during Week 25, moving from net imports of more than 100 GWh to net exports of around 21 GWh. Wholesale prices nevertheless rose over the same period. The SEEPEX day-ahead market averaged approximately €85.73/MWh, up nearly 10% week on week.
Hydro generation improved considerably, while thermal output declined. In a scenario driven only by domestic conditions, stronger hydro production alongside a positive export balance would typically be expected to reduce price levels. Serbia’s market is instead influenced by an increasingly interconnected regional system.
Regional interconnector signals and congestion effects
Cross-border trading and interconnector flows transmit market signals between Serbia and neighbouring markets including Hungary, Romania, Croatia, Bulgaria, and Greece. Congestion patterns also shape how those signals are reflected in Serbian pricing. As a result, wholesale outcomes in Serbia can diverge from what domestic supply and demand alone would suggest.
The Week 25 price pattern also aligned with higher trading levels elsewhere in the region. Hungary traded at higher levels, Croatia exceeded €100/MWh, and Romania recorded price increases. Italy maintained a substantial premium over the rest of the region.
Together, these developments created a regional pricing floor that Serbia could not fully avoid. This illustrates a broader shift across Southeast Europe where national energy balances are no longer sufficient to explain price movements. A country can generate more electricity and increase exports while still seeing rising prices if nearby markets face tighter supply conditions.
Hydropower flexibility during summer demand swings
Improved hydropower output provided additional flexibility to the system during Week 25. It also reduced the need for electricity imports. Hydropower is described as Serbia’s most important flexible renewable resource because it supports system balancing and limits exposure to expensive peak-hour imports.
The role of hydropower is linked to seasonal operating conditions. During summer, higher temperatures increase cooling demand, while expanding solar generation creates steeper intraday fluctuations. In that context, hydro output helps manage variability across the day.
Lignite generation and the shift toward flexibility
Coal-fired generation remains central for maintaining system reliability in Serbia. Even with lower thermal output during Week 25, the country continues to rely heavily on lignite-based generation to ensure security of supply. Lower thermal dispatch can ease short-term emissions pressures and reduce fuel consumption.
As renewable capacity expands, thermal plants are expected to shift from primarily baseload operation toward providing flexibility, reserves, and backup capacity. The transition is described as requiring accelerated investment in grid infrastructure, forecasting capabilities, balancing mechanisms, and energy storage solutions.
Trading dynamics for SEEPEX participants and investors
For market participants, Serbia’s pricing behaviour does not always track developments in neighbouring markets. The market can trade below Hungary and Croatia while remaining close to Bulgaria and Greece, even when premiums emerge from Italy and Central Europe through regional price formation.
This complexity increases the strategic importance of SEEPEX during periods when changes in hydro generation alter Serbia’s domestic supply balance . For investors assessing future renewable projects in Serbia, profitability is described as depending on more than expected annual production volumes.
Key factors include grid connection quality, dispatch characteristics, curtailment risk, balancing costs, power purchase agreement structures, and access to buyers able to manage hourly market volatility . Week 25 reflects that Serbia can become a net exporter while still recording higher electricity prices due to the influence of regional scarcity on domestic pricing.
