Sharp fall in Romanian day-ahead pricing
Romania’s average day-ahead electricity price fell from approximately €238/MWh on September 14 to €189.58/MWh on September 15. The change represents a reduction of around 20% over 24 hours. Despite the retreat, the market stayed among the most expensive in Southeast Europe. It was slightly above Bulgaria and Greece, and close to the level recorded in Hungary.
Wind forecasts and cross-border flows
The decline was driven primarily by improved wind-generation forecasts across northern and western Europe. Higher wind output reduced Germany’s import requirement, easing pressure on interconnectors. With less need for imports, more electricity became available for neighbouring markets.
On September 14, Romania had effectively passed through part of a Central European supply shock. Electricity moving from lower-priced southern markets toward Hungary and Central Europe increased upward pressure on Romanian prices. The episode highlighted how quickly scarcity can be transmitted within Europe’s coupled market structure.
Nuclear outage and limited flexibility affect marginal pricing
Domestic conditions intensified the impact of cross-border movements. The unavailability of the 1,400 MW Cernavodă nuclear plant removed Romania’s largest source of continuous low-carbon generation. At the same time, weak hydrology and limited storage constrained system options. Insufficient volumes of flexible low-cost capacity left the system more reliant on imports and expensive thermal generation during peak hours.
The September 15 price drop did not indicate a structural improvement in Romania’s supply position. No new dispatchable plant or material storage capacity entered operation between the two trading sessions. Instead, changes in European wind conditions reduced the number of hours when expensive gas-fired generation set the marginal price.
Price swings and implications for market participants
The scale of daily volatility affects industrial consumers and suppliers with unhedged positions. A move of almost €50/MWh within one day increases cash-flow and collateral requirements. This holds even when an average monthly supply position appears manageable.
Romania has expanded solar and wind capacity rapidly, but the pricing pattern reflects differences between installed capacity and dependable output. Batteries can shift solar production across several hours, while hydropower, demand response, interconnection upgrades and flexible generation are needed for longer periods of low renewable availability. Until those resources expand, Romania remains sensitive to weather conditions and generation outages beyond its borders.
