EnAppSys- 15-Minute trading in EU day-ahead markets

The introduction of 15-minute trading on all day-ahead electricity markets of the EU, originally announced for June, is now imminent:

In the electricity markets connected through the cross-border Single Day-Ahead Coupling (SDAC), the Market Time Unit (MTU) will be reduced from 60 minutes to 15 minutes starting with the day-ahead auction on September 30, 2025 (delivery day: October 1, 2025).
- It will still be possible to submit bids in 60- or 30-minute MTU. (Info from EPEX SPOT)
The affected electricity markets are:
- Central Europe: Belgium, Germany, France, Luxembourg, Netherlands, Austria.
- Southern Europe: Italy, Portugal and Spain.
- Eastern Europe: Estonia, Latvia, Lithuania, Poland, Slovakia and Czech Republic.
- Southeastern Europe: Bulgaria, Greece, Croatia, Romania, Slovenia and Hungary.
- Northern Europe: Finland, Denmark, Norway and Sweden.
The publication of the day-ahead auction results will also take place in 15-minute resolution from the delivery day October 1, 2025.
- A 60-minute price index will also be published as the arithmetic mean of the corresponding 15-minute prices. (Info from EPEX SPOT)

We, at Montel EnAppSys, will strive to minimize potential disruption to a minimum. While we cannot be 100% certain no data feeds will break at source, our platform is ready for the transition.

Data download was already possible in any resolution and this will not change. If you download day ahead prices or related data in hourly resolution, you may want to update the resolution of your download.

You can do this now, no need to wait for the market change. If you do not change your data download, you will continue to receive the data in the resolution you have defined, with no disruption of service or requirement to change the API-call.

If any data seems to be missing or looks incorrect, despite our precautions, please let us know by emailing support.enappsys@montel.energy.