The shift from centralized to decentralized energy, with the development of renewable energies, is giving rise to new energy models. Some of these models aim to increase the citizens participation in the energy transition, such as the energy communities. This concept has recently emerged in Europe to encourage the development of local projects and raising citizens' awareness. Our aim is to better understand how such communities emerge to foster them, and to propose a tool for B2T (Business to Territory) Business Developers. We have developed a generic methodology to follow the formation of sociotechnical systems based on a modeling of the Actor-Network Theory. We use the concept of Socio-Energetic Node and propose a model of it to apply our generic methodology to Local Energy Communities. Preliminary results are presented at the end of this paper on a case study.