We are excited to share further details on the September members’ testing phase of the 15-minute Market Time Unit (MTU) transition. This phase will begin on 8 September 2025, marking another significant step in our journey toward the planned go-live on 30 September 2025, with delivery date set for 1 October 2025. During this phase, NEMOs and TSOs will facilitate the joint testing of market participants’ systems. The member tests in April and May 2025 covered a wide range of scenarios; the focus of the member testing phase in September is to provide market parties with the opportunity to confirm that their systems are (still) in a go-live ready state. Our teams have performed rigorous testing to guarantee the system’s efficiency and reliability from day one. TSOs will provide production-like capacities. However, the accuracy of the market coupling results in these tests are dependent on the involvement of market participants. Therefore, auction results may deviate from production-like values.
Full details and the testing schedule are available at the link below.