VIS along with Grant Thornton are excited to have won a contract by ACER (The European Union Agency for the Cooperation of Energy Regulators) to execute a study that analyses regulatory barriers towards an ever-increasing electricity prosumerism landscape in the European Union. The activities, services and solutions that can be driven by prosumers are not fully explored yet and constitute a new complex element in the overall electricity market map. Under this context we will map out the regulatory regime with respect to prosumers, its application in the different 27 EU Member States, and will identify regulatory barriers towards the proliferation of prosumers. Based on this analysis, recommendations addressing regulatory barriers will be drafted.