In this paper, we analyze how new models of exchanges in the electricity sector may be viable and yield incentives to invest in decentralized domestic production units based on renewable energy sources. We try to identify the factors and the elements in the platform design that influence participation of prosumers in peer-to-peer energy exchanges in local microgrids. Compared to the no-platform configuration, we find that a pure dealing platform exhibits no less incentives to install domestic production units. However, this main result is challenged by considering several relevant features for peer-to-peer energy exchanges.