P2P energy trading pilots have proved some of their benefits for prosumer and renewable energy valorisations. Simultaneously, the electricity market regulations have been prepared to allow new business models in the electricity sector. However, P2P energy trading is not yet generalised, although the research literature is increasing and the integration of renewable energy production is inevitable. The authors assume this lack of adoption is partly due to few works on decisionmaking to select and implement an energy sharing scenario. This work aims to identify some major challenges with P2P energy trading to make decision-making based on simulations. The implementation presented in this article concerns the centralised communication aspects.