International Comparison of Smart Meter Solutions and Functionalities in Europe
Smart electricity meters (commonly referred to as Smart Meters, SM) play a crucial role in the European Union’s (EU) decarbonisation strategy. They not only enable real-time energy data exchange, but also participation in demand response programmes and seamless integration of local flexibilities. Although cross-border standardisation would offer technical and economic benefits of scale, the introduction and implementation of SMs and the required infrastructure in the EU remains highly fragmented. The main reason for this is the national interpretation of EU directives, which, although binding across the Union, have led to the development of different technical specifications and control options tailored to the needs of each country. This has resulted in a patchwork of divergent SM regulations across Europe, which complicates interoperability, increases integration costs, and hampers innovation and market growth for various stakeholders, such as SM and HEMS manufacturers, system integrators, or grid operators.
The focus of the following analysis is on the discrepancies and inconsistencies caused by regulatory and technical differences in European SM infrastructures, as well as on how these can be overcome. As a first step, a comprehensive analysis of EU legislation, in particular Directive (EU) 2019/944 and Commission Implementing Regulation (EU) 2023/1162, is carried out. From this, an EU SM reference model for SM infrastructure is developed (see Figure 1).
In the second step, detailed country studies are conducted for Italy, the Netherlands, Poland, Sweden, Spain, Germany, France, and the United Kingdom, analysing rollout strategies, control structures and system architectures in relation to the EU SM reference model, as well as country-specific deviations.
This is followed by a structured assessment of relevant use cases to examine the impact of regulatory divergence and to evaluate the feasibility of key functions (such as dynamic tariffs, controllability, real-time data services) within national frameworks. Finally, the collected information and data are summarised in country profiles. As examples, the country profiles of Germany (Figure 2) and Spain (Figure 3) are provided here.
The results of the country analysis reveal a clear trade-off between speed of implementation and technical ambition. Three different approaches to the introduction and rollout of SMs in the analysed countries were identified: The first group of countries pursues a pragmatic approach, with SMs including only essential core functions. The second group of EU Member States, on the other hand, focuses on technological ambition and has established a complex SM infrastructure with advanced measurement and control functions. The third group has designed its SM infrastructure around a central data hub.
These differences directly limit the scalability of advanced energy services and dynamic tariffs. Automated flexibility management remains difficult to implement in markets with heterogeneous standards. The survey conducted highlights the extent of the challenges. Most participants describe Europe’s SM regulation as highly heterogeneous and see country-specific regulations and non-standardised infrastructures as the biggest obstacles to their business activities.
They cited two key advantages of harmonisation: easier system integration and improved regulatory consistency. Practical insights show a clear consensus among industry stakeholders that the fragmented regulatory landscape causes significant burdens that could be avoided through consistent and harmonised legislation. Harmonisation is seen as the key to measurable cost savings, new business opportunities, and strengthening the competitiveness of European SM markets.
Based on these findings, this contribution proposes a roadmap for harmonisation: mandatory interoperability standards for central SM functions, modular system architecture for stepwise updates, expansion of eIDAS-based identity solutions for user-controlled data access, and coordinated regulatory incentives to reduce fragmentation. Furthermore, by combining regulatory analysis, technical evaluation, assessment of relevant use cases and economic analysis, this work provides one of the first integrated approaches to illustrate how deviations from the EU reference model restrict the speed of deployment, scalability of services, and market opportunities. The results underline that standardisation is not only a regulatory goal, but a fundamental prerequisite for the economic, environmental, and consumer benefits of the digital energy transition in Europe.
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