Day-ahead electricity prices across eastern Southeast Europe fell back towards €160/MWh for Sept. 26 delivery, but intraday prices still moved from near zero to more than €250/MWh, reinforcing the commercial value of batteries and other flexible assets.
Hungary cleared at about €161.2/MWh, Romania around €162/MWh, Bulgaria €160.6/MWh and Greece close to €160/MWh.
The decline followed prices above roughly €213-220/MWh in several markets a day earlier.
But the baseload averages concealed far more extreme hourly moves.
Hungarian and Romanian electricity fell to around €0.70/MWh during solar-heavy afternoon periods before climbing to roughly €251/MWh later in the day.
Greek prices dropped to about €2/MWh during the cheapest hours, while Bulgaria traded near €15/MWh.
In Hungary, the cheapest three-hour window averaged roughly €10.7/MWh, compared with about €228/MWh during the most expensive three hours.
That spread is increasingly the important number for investors.
A battery does not require high prices throughout the day. It needs sufficiently cheap charging hours and sufficiently expensive discharging hours.
The Sept. 26 profile provides exactly that.
Rapid solar expansion across Hungary, Romania, Bulgaria and Greece is depressing prices around midday, while limited storage and dispatchable capacity continue to support strong evening scarcity premiums.
Pumped hydro, flexible demand and shaped PPAs gain similar value from that volatility.
For solar generators, the development is more challenging.
Producing electricity during the cheapest hours means capture prices can fall well below daily baseload averages, weakening merchant revenues unless generation can be stored or contracted differently.
The regional market is therefore becoming increasingly bifurcated.
Average electricity prices may fall, but the value of power delivered at the right hour can remain exceptionally high.
For storage investors, that distinction is more important than the baseload number.
