Epex Spot Switches to 15-Minute Grid for Day-Ahead Trading
After over a year of preparations, the European power exchange Epex Spot has switched to a 15-minute grid for day-ahead trading. The move, delayed from June, began on Tuesday, 30 September 2025, with deliveries starting the next day. This shift aims to better reflect market reality and benefit renewable energy sources.
Previously, trading occurred in 60-minute blocks, requiring hourly increments for feed-in forecasts. The new 15-minute intervals are expected to reduce ramp costs and increase revenues for direct marketers. Jörg Seidel, head of short-term plant optimization at Vattenfall, described the change as a 'real paradigm shift for the energy transition'.
The switch is a result of an EU requirement for all European power markets to use 15-minute settlement periods. Despite the delay, trading began as planned on 30 September. The industry hopes this change will bring positive impulses for the marketing of battery storage systems and dynamic power tariffs.
The successful implementation of the 15-minute grid is expected to improve the accuracy of power price signals, benefiting both renewable energy producers and consumers. The industry awaits the positive impacts on battery storage systems and dynamic power tariffs, as the energy transition continues to evolve.
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