Under CopyrightRohde, ClemensClemensRohdeDurand, AntoineAntoineDurandNeusel, LisaLisaNeuselBarckhausen, AntonAntonBarckhausenJensterle, MihaMihaJensterle2022-03-1427.10.20202020https://publica.fraunhofer.de/handle/publica/40907310.24406/publica-fhg-409073Energy efficiency networks (EENs) have established themselves as a firm fixture in the global energy efficiency landscape. At least 21 countries and all continents except Australia have experience with energy efficiency networks to this point. The authors count 1,333 EENs worldwide, with Germany and China far ahead of other countries in terms of absolute numbers. Next, this paper offers insights from the monitoring ofthe German Initiative Energy Efficiency Networks, set up as a voluntary measure within the framework of the National Action Plan for Energy Efficiency in 2014. To date, 272 EENs have registered under this programme. The results of the accompanyingmonitoring are represented separately for different levels: that of networks, that of participating companies and that of individual energy efficiency measures implemented. Across these different levels, a large heterogeneity in terms of the mainparameters such as energy and CO2 savings can be observed, highlighting the diversity of participating companies and the contexts they operate in. Also presented are the factors which seem to contribute to the successful or less successful operation of the networks. Finally, the paper offers a short discussion on the operational and political choices faced by the potential future initiators of an energy efficiency networks initiative.enEnergy efficiency networkEnergy management systemEnergy efficiency action plansEnergy efficiency policy303600conference paper