EEX Power registry migration to G-REX
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Phase Description
The migration phase to G-REX platform includes the preparation of environments, user training, as well as the gradual implementation of the new system. This transition is carried out in several stages in order to minimize interruptions and to support each user in his or her familiarisation with G-REX.
Deployment Phase Timeline
Learn about the key milestones of the G-REX migration and the key dates for deployment. This phase aims to ensure a smooth transition to the new platform while ensuring continuity of services.
| Date | Time | Format | Details |
|---|---|---|---|
| 30 July 2025 | 10-12 am CET | Webinar | Migration schedule in detail, the testing phase, the user guides and the registry |
| 31 July 2025 to 19 October 2025 | Phase | Free access to the G-REX test platform along with the provision of documentation for API access. During this phase, support related to the test platform will be limited and mainly concentrated during the Q&A sessions. However, user guides and tutorial videos will be made available to help you get familiar with the platform. | |
| 1 August 2025 | 10-11:30 am CET | Online Q&A Session | Dedicated support for the test platform |
| 13 August 2025 | 10-11:30 am CET | Online Q&A Session | Dedicated support for the test platform |
| 11 September 2025 | 10-11:30 am CET | Webinar | Progress of the migration project, the new rules of the registry and reminders of the test phase |
| 12 September 2025 | 10-11:30 am CET | Online Q&A Session | Dedicated support for the test platform |
| 20 October 2025 | 4 pm CET | Phase | Closure of the current electricity GO registry for data migration to G-REX. No access or operations will be possible on this registry from this day onwards |
| 3 November 2025 | Phase | Opening of the registry on G-REX with migrated data from the previous registry accompanied by the release of user guides | |
| 12 November to 19 November 2025 | Phase | Order book opening and auction of the French state (unchanged calendar) |
Presentation of migration and exchange
Find the slides of the presentation related to the migration webinar, which is only available in French, in the table below.
| Presentation slides of the webinar | |||||
|---|---|---|---|---|---|
| Publishing date | Title | File | |||
| 2025-08-01 | Migration to G-REX Webinar n°1 presentation | pdf (613 KB) | |||
User guides
Below are guides categorised to help you use G-REX effectively as soon as it goes live.
| Category | Video Link | Guide pdf |
|---|---|---|
| API manual | - | Download PDF |
| First time login | Download video | Download PDF |
| Adding a power plant | Download video | Download PDF |
| Emission | Download video | Download PDF |
| Transfer | Download video | Download PDF |
| Cancellation | Download video | Download PDF |
| Creation users and role assignment | Download video | Download PDF |