From 30 September 2025, electricity on the European day-ahead market will no longer be traded in hourly blocks but in 15-minute intervals. The reform aims to better reflect the variability of wind and solar power, improve price formation, and reduce the need for intraday corrections.
It is expected to increase system flexibility, support the use of storage technologies, and provide renewable operators with lower balancing costs and greater planning security. For consumers, more precise price signals could enable savings through dynamic tariffs and smart meters, supporting technologies such as heat pumps, solar PV, batteries and electric vehicle charging. The change is part of an EU directive to harmonise trading and settlement periods to 15 minutes and will also support the Single Day-Ahead Coupling (SDAC) for cross-border electricity trading.
