Between 15 and 21 June 2026, regional day-ahead markets in Southeast Europe showed a clear shift in hourly pricing. Prices softened during solar-rich hours and then increased sharply after sunset. The key signal from the week was the changing shape of the hourly pricing curve rather than the average electricity price.
Solar generation rose by 8.1% over the week, adding more renewable output to the system. Despite the higher solar contribution, average electricity prices increased across most regional markets. The pattern was linked to conditions in the evening period rather than to a shortage of electricity across the day.
The lowest pricing pressure occurred around midday, while the strongest price increases appeared after hour 18. Evening hours were described as more exposed to supply tightness as cooling demand remained elevated and solar production declined rapidly. This created a pricing profile where midday softness contrasted with stronger evening pressure.
Evening premium expands across regional day-ahead markets
Markets including Hungary, Romania, Croatia and Italy moved into premium pricing territory during the evening period. The evening ramp was identified as increasingly central to market commercial activity. Opportunities were associated with gas-fired generation, battery storage, hydropower flexibility, imports and demand-response solutions.
Changes in price dynamics also affected revenue patterns for different asset types. Solar projects exposed to merchant market conditions faced a growing risk of price cannibalisation during midday hours when renewable output is highest. Assets able to shift generation into evening peak periods were described as having a stronger revenue outlook.
Electricity buyers relying only on flat PPAs were noted as remaining exposed to the most expensive hours of the day. Contract structures were highlighted as needing mechanisms that account for shaping, balancing services or storage-backed delivery. These elements were presented as ways to address exposure to evening price levels.
Gas prices fall while power prices rise in several markets
The week also showed that fuel prices were not the only benchmark for electricity market performance in Southeast Europe. While TTF gas prices declined by 14.8% to €41.76/MWh, electricity prices still increased in Serbia, Hungary, Romania, Croatia and Italy. This pointed to a role for scarcity-hour supply conditions alongside fuel cost movements.
In that context, value was associated with firmness and flexibility during tight periods rather than responding exclusively to changes in gas prices. The pricing outcomes were tied to availability of dispatchable capacity during evening hours when solar output falls quickly. The relationship between renewable output and hourly pricing shape remained a central feature of Week 25.
Flexibility assets gain prominence for late-afternoon to midnight supply
For investors and market participants, technologies providing flexibility were described as becoming more valuable than simple installed capacity additions. The flexibility set included batteries, pumped-storage hydropower, flexible gas generation, hydro optimisation and shaped renewable PPAs. These asset types were linked to delivering power during critical hours between late afternoon and midnight.
The next phase of the SEE power market was characterised as being shaped less by annual generation volumes and more by the ability to supply reliable electricity during that late-day window. The week’s observed hourly curve changes reinforced that focus on evening-period delivery conditions across regional markets.