In line with the Commission Implementing Regulation (EU) 2023/1162 on interoperability requirements and non-discriminatory and transparent procedures for access to metering and consumption data, ENTSO-E and EU DSO Entity continue their cooperation on data transparency and interoperability within the Joint Working Group (JWG) on data interoperability, established in 2023. The JWG supports and advises the EC in monitoring and further developing the implementing acts on data interoperability in accordance with Article 24(2) of Directive (EU) 2019/944 and Article 12(2) of Implementing Regulation (EU) 2023/1162. This joint work aims to ensure consistent mapping and further development of data interoperability requirements and rules for metering and consumption data, demand response, and customer switching, while also supporting the EC in any additional implementing acts on data interoperability it may deem necessary. DSO Entity and ENTSO-E will also continue to update the JWG Repository, a common IT platform mandated by Article 12(1)(c) of Regulation (EU) 2023/1162 and established in July 2025. The JWG Repository publishes guidance for Member States on mapping national practices for data interoperability, the collected mappings and their version history, and other relevant information supporting European energy service interoperability. This includes, but is not limited to, implementing acts on data interoperability adopted by the EC and data interoperability models.

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