Evening peak power has become the main risk window in southeast European day-ahead markets, as higher demand, weaker renewables and increased thermal reliance support prices during the hours when solar output fades.
The Week 27 hourly price pattern showed the strongest stress during the evening block, particularly around 19:00–22:00. This period is increasingly important for traders because solar generation is no longer available at full strength, while cooling demand can remain elevated.
The wider market backdrop supports the evening peak risk. SEE electricity demand increased 2.1% to 18.80 TWh, while variable renewable generation declined 3.3% and hydropower output fell 3.4%. This left the system more dependent on dispatchable generation and imports.
Thermal output rose 6.5% to 6.86 TWh, with lignite and coal up 11.6% and gas-fired generation up 3.3%. The higher role of thermal generation increases the importance of fuel costs and plant availability during peak hours.
The evening peak risk is most relevant in the premium markets. Romania and Hungary averaged EUR 164.31/MWh and EUR 162.04/MWh, respectively, while Croatia averaged EUR 142.57/MWh and Serbia EUR 139.93/MWh. These markets should remain the main focus for peak and super-peak products.
Cross-border flows add another layer of risk. Hungary, Romania and Serbia all increased net imports during the week, meaning evening demand in these markets may be more exposed to regional supply availability and interconnector conditions.
For traders, baseload averages are not enough. The key question is whether the evening block is tightening faster than the daily average. If wind remains weak and gas stays firm, peak-baseload spreads could remain supported.
Trading view: prioritise the 19:00–22:00 block. SEE tightness is most actionable as an evening peak story, especially in Romania, Hungary, Serbia and Croatia.
