The introduction of smart metering represents another major change in the energy sector in Europe. With the requirements of Art. 13 of the so-called Energy Services Directive (2006/32/ED, ESD) and the adoption of the Directive on the internal electricity market (2009/72/EC), it became clear that the modernisation of the European meter infrastructure and the introduction of intelligent metering systems will have to happen. With the start of the internal market for network-dependent forms of energy (electricity and gas), the old energy companies were legally divided into a minimum of two new parties, namely the party involved in supplying the energy (the supplier) and the party managing the distribution network (the network manager). The distinction between the supply of energy (electricity and gas) and the transport of energy was made to ensure fair competition. All energy suppliers are entitled to use the existing networks. Suppliers deliver the energy to the consumers via agreements that are realized through the free-market principle. Electricity and gas are transported and distributed by the network managers. Among others, it is the responsibility of the network managers, who are region-bound and regulated, to maintain the networks they manage. An additional push can be expected from the work of the Smart Grid Task Force of the European Commission and the ongoing work of European standardisation bodies.