The aim of this master thesis is to develop a decision tool to model and simulate one or more completely renewable H2-based μgrid together. To do that was necessary to: choose an adequate software; analyse the dates hold by the user; study each technology needed in the μgrid; build a simulation model for each technology; permits to the user to introduce the main parameters of the system; give the possibility to run the μgrid with only some components. A clear and comprehensible interface was created in order to show the main process parameters changing during the operation of the model, and the main economic variables linked to the chosen μgrid.