As also indicated in the European Parliament Resolution of 19 June 2025, electricity networks are the backbone of the European energy system. They are essential to achieve the clean energy transition and to deliver renewable energy while supporting economic growth. Significant investments are required, along with appropriate regulatory oversight, to expand the electricity infrastructure, ensuring a decarbonised, flexible, more decentralised, digitalised and resilient electricity system.
To further strengthen the regulatory oversight on electricity grids and to support the NRA monitoring of electricity network performances, CEER, the Council of European Energy Regulators, in cooperation with the European Union Agency for the Cooperation of Energy Regulators (ACER), issued a guidance paper "Electricity transmission and distribution "smart-grid" performance indicators" in June 2024.
The present document is a follow-up to the guidance paper, aiming to provide additional contributions to the ongoing debate and to identify a limited set of indicators which could be used by National Regulatory Authorities to monitor and assess the performance of system operators in relation to the development of a smart grid that promotes energy efficiency and the integration of energy from renewable sources, as required by Article 59(1) of Directive (EU) 2019/944.
The performance evaluation process and its output and input indicators enable NRAs to assess historical performance and its evolution, establish the current situation and adopt a prospective vision to set desired targets and objectives.
Therefore, the performance evaluation framework should leverage network development plans and system operator business plans.
The proposed indicators and the performance evaluation framework could further constitute a sound basis for incentive regulation purposes, acknowledging the fact that it is the NRA's prerogative to select the best instruments to ensure efficiency while delivering the most value to markets and customers.
More specifically, the paper proposes the following 14 output indicators, in 6 dimensions, to support monitoring and assessing the performance of system operators in developing a smart grid as a starting point for each NRA to consider.
Dimension 1 - Integration of renewable energy generation
Dimension 2 - Integration of increased electrification of energy uses
Dimension 3 - Continuity of supply and resilience to extreme events
Dimension 4 - Other quality of supply objectives
Dimension 5 - Energy efficiency
Dimension 6 - Data made available to market participants
The proposal of output indicators related to the 7th dimension identified in the 2024 ACER-CEER paper (transmission-related market integration) is addressed by an ACER work published in a coordinated way with this paper.
This paper acknowledges that some of the proposed indicators feature an open and broad scope. Besides the possible lack - in some instances - of precise metrics at this stage, the rationale of this approach considers that similar but slightly different indicators may already be in use across countries. The intended contribution of this paper is to provide a holistic overview of the whole spectrum of network performances across the selected dimensions. More detailed definitions of some indicators, including their possible harmonisation, should better be addressed by activities tailored to a single dimension, such as the regular CEER reports on power losses and on benchmarking the quality of electricity supply for instance.
Download full report at: Electricity-smart-grid-performance-indicators-combined-2
Source: CEER
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