The most important signal from Week 25 was not the average electricity price, but the changing shape of the hourly pricing curve. Southeast Europe is increasingly entering a market environment where growing solar generation can reduce prices during midday hours while leaving the evening period significantly more exposed to supply tightness. This pattern was clearly visible across regional day-ahead markets between 15 and 21 June 2026, as prices softened during solar-rich hours before rising sharply after sunset.
This development is becoming a defining feature of the SEE electricity market. During the week, solar generation increased by 8.1%, contributing additional renewable energy to the system. However, higher renewable output did not prevent average electricity prices from increasing across most regional markets. The underlying issue is not a shortage of electricity throughout the day, but rather a shortage of flexible and dispatchable capacity during evening hours when cooling demand remains elevated and solar production rapidly declines.
The hourly price profile illustrates this trend clearly. The lowest pricing pressure occurred around midday, while the strongest price increases emerged after hour 18. Markets such as Hungary, Romania, Croatia and Italy moved into premium pricing territory during the evening period. This evening ramp is increasingly becoming the commercial centre of the market, creating opportunities for gas-fired generation, battery storage, hydropower flexibility, imports and demand-response solutions to capture additional value.
As a result, the economics for both generators and electricity buyers are changing. Solar projects that rely on merchant market exposure face a growing risk of price cannibalisation during midday hours when renewable output is highest. In contrast, assets capable of shifting generation into evening peak periods benefit from a stronger revenue outlook. Likewise, buyers relying solely on flat PPAs remain exposed to the most expensive hours of the day unless contracts incorporate shaping mechanisms, balancing services or storage-backed delivery structures.
The week also demonstrated that fuel prices are no longer the sole benchmark driving electricity market performance in Southeast Europe. Although TTF gas prices declined by 14.8% to €41.76/MWh, electricity prices still increased in Serbia, Hungary, Romania, Croatia and Italy. This indicates that the market is placing greater value on firmness, flexibility and scarcity-hour supply, rather than responding exclusively to movements in fuel costs.
For investors and market participants, the signal is increasingly clear. Technologies and assets that provide flexibility—including batteries, pumped-storage hydropower, flexible gas generation, hydro optimisation and shaped renewable PPAs—are becoming more valuable than simple installed capacity additions. The next phase of the SEE power market will be shaped less by annual generation volumes and more by the ability to deliver reliable electricity during the critical period between late afternoon and midnight.