ACER seeks feedback on its preliminary model for assessing electricity flexibility needs in the EU
ACER seeks feedback on its preliminary model for assessing electricity flexibility needs in the EU
What is it about?
On 5 November 2026, ACER will open a public consultation on the preliminary version of EU-Flex, an open-source electricity market model developed to assess flexibility needs across the EU.
Electricity flexibility is the power system’s ability to respond to changes in supply and demand. Under the EU’s Electricity Market Design reform (2024), ACER is tasked with estimating flexibility needs across the EU and identifying potential gaps.
The first assessment is planned for July 2027, with the EU-Flex model supporting this process.
Why consult?
Stakeholders will have the opportunity to explore the proposed modelling approach ahead of the 2027 assessment.
The preliminary release of EU-Flex will include:
An explanatory paper introducing the model and demonstrating its use through a test case.
The preliminary model, including its source code and test case input data.
A document describing the underlying methodology.
The consultation will help ACER gather feedback on the model and its methodology, as well as identify potential gaps, limitations and areas for improvement.
Get involved!
The public consultation will run from 5 November to 17 December 2026.
On 17 November 2026, ACER will hold a webinar to present the model, explain its key features and demonstrate how to run it. Register for free.