LAUSR

Abstract The increasing number of distributed renewable energy systems and smart-grid technologies, are transforming electricity grids and markets, allowing the growth of peer-to-peer (P2P) energy markets, where consumers and prosumers trade directly with each other. Policymakers are then faced with the task of assessing alternative ways to manage and organize the electricity grid and market. This work explores the potential of P2P energy trading under different available technologies and market paradigms, by analysing the economic benefits for residential consumers and prosumers, given different solar generation contexts and load flexibility levels. The model is applied to the Portuguese residential sector. Results show that with best techno-economic sizing solution for solar photovoltaic (PV), the greater economic gains come from flexibility, reaching a maximum of 28% for consumers and 55% for prosumers, in a P2P trading scenario. However, if we consider flexibility and a high-solar fraction PV sizing, the savings would reach 29% for consumers and 113% for prosumers. P2P economic benefits are found to depend on the type of participating agents involved, demand profile, PV surplus and monetization schemes, level of flexible equipment, which will greatly influence which trading strategies work best, meaning that each case study needs a tailored P2P trading scheme.