April trading across Southeast European electricity markets unfolded under a clear and coordinated shift in system fundamentals, with price compression emerging as the dominant feature across all major exchanges. Spot prices across Hungary’s HUPX, Romania’s OPCOM, Serbia’s SEEPEX, Bulgaria’s IBEX and Greece’s HENEX declined in a tight range of approximately −11% to −20% over the second half of the month, marking one of the most synchronized downward corrections observed since the post-2022 stabilization phase.
The decline was not driven by a single factor but by a combination of demand contraction and structural changes in the generation mix. System-wide consumption across the Hungary plus SEE region declined by approximately 1.6 GW on average, reflecting both seasonal transition effects and weaker industrial offtake. Warmer temperatures—rising by roughly +2°C across core SEE markets—reduced heating demand, accelerating the drop in baseload consumption.
On the supply side, the shift in generation composition was decisive. Solar output increased materially, rising by approximately +716 MW in average daily contribution, while wind remained broadly flat. In contrast, dispatchable generation sources contracted sharply. Gas-fired output declined by approximately −633 MW, while hydro generation fell by nearly −942 MW, reflecting weaker hydrological conditions in several markets. Coal and nuclear output remained relatively stable, acting as residual baseload anchors.
The combination of declining demand and increasing non-dispatchable solar output produced a classic oversupply pattern during daylight hours, compressing peak prices and flattening the intraday curve. This dynamic is increasingly visible in SEE markets, where solar penetration—though still below Western European levels—is now sufficient to drive midday price suppression.
Net export dynamics further reinforced the bearish trend. The region’s net export position improved from approximately −1,289 MW to −767 MW, indicating reduced reliance on external demand sinks. Export flows toward Italy declined significantly, while flows toward Ukraine and Moldova increased modestly, suggesting a partial reorientation of trading corridors.
From a structural perspective, April confirmed that SEE power markets are entering a transitional phase characterized by renewable-driven price formation. The marginal pricing mechanism is gradually shifting away from gas-based generation toward solar-dominated intraday dynamics. This introduces higher volatility, sharper peak-offpeak spreads, and increasing risk of negative pricing events in high-generation periods.
The persistence of this trend will depend on several balancing factors. Hydro recovery, if realized in late spring, could add further downward pressure on prices. Conversely, any rebound in industrial demand or tightening in gas markets could partially stabilize baseload pricing. However, the underlying structural shift remains clear: the region is moving toward a hybrid pricing regime where renewable intermittency, rather than fuel cost, increasingly dictates short-term market behavior.