In this project, the UTT proposes the establishment of an experimental building for the production of electricity, heat and air conditioning using the solar renewable source, all coupled with the optimisation of production by the bidirectional connection of renewable heat between two heat networks: the internal heating network of the UTT and that of the biomass heat network around the UTT. This is in the light of a circular economy of proximity. To cover heating and air conditioning needs, parabolic solar collectors will be deployed to produce thermal energy by injecting hot water into the biomass heat network for one of the buildings in the UTT ellipse. An absorption machine coupled with the heat network makes it possible to transform the thermal energy for the cooling of this building. This strategy will make it possible to take advantage of the heat during the summer to produce air conditioning. The production of electricity will be ensured by organic photovoltaic films installed on the roof of the experimental building. This experimental project is part of a proactive approach of exemplarity, reproducibility and larger scale deployment. It promotes the energy transition of a territory by establishing synergies, in a logic of circular economy, between public and private actors, with potential fallouts for the UTT and sites similar to ours.