This week’s data shows how closely solar production, day-ahead prices and imbalance prices are connected in today’s electricity markets.
Strong solar generation
PV production increased steadily throughout the week. For a 1 MWp installation, average production reached nearly 4 MWh per day. In this way, large volumes of solar energy enter the energy system with a very low marginal cost, increasing supply and typically pushing electricity prices downward (and even negative).
Why Day-Ahead and Imbalance prices move together
The close alignment between Day-Ahead and imbalance prices this week show structural changes in modern electricity systems:
1.Accurate renewable forecasts
Improved weather models and AI-driven forecasting enable market participants to predict solar and wind generation with much greater accuracy. When estimated production closely matches actual generation, fewer corrections are required on the imbalance market, causing imbalance prices to more closely follow the Day-Ahead market trend.
2.Flexible assets smoothing the system
Batteries, demand response, and flexible generation units respond quickly to short-term deviations. This reduces large deviations in imbalance pricing.
3.Shorter market intervals
Since October 2025, DA energy prices have been calculated in 15-minute intervals instead of hourly. With both the DA and balancing markets now using similar time intervals, the DA schedule better reflects real-time grid conditions, reducing structural differences between the markets.
4.Active TSO balancing
The TSO actively manages real-time supply-demand balance using balancing reserves. These interventions correct small deviations before they can create large price spikes, keeping imbalance prices close to DA prices.
5.Cross-border market integration
Coupled European markets, enabled by the launch of PICASSO, strengthen cross-border integration and coordination. By allowing more efficient electricity flows across borders, this integration supports better imbalance management for grid operators. With cross border trades coordinated and market participants optimizing their portfolios, day-ahead schedules more closely reflect the conditions that drive real-time imbalances.
Implication for the market
For energy market participants, this convergence means that opportunities for imbalance profits are smaller than in the past. At the same time, it reflects a more predictable and stable system, which benefits providers of flexible assets, such as batteries, and supports effective demand response strategies.