The energy transition requires a place where to pilot and demonstrate a fully renewable energy system which is sustainable both technically and economically. The energy company Flexens has identified the opportunity to develop and build a society scale energy system based on renewable energy sources on Åland together with the island government– an island with ideal wind and solar conditions and an ambitious climate- and energy strategy with a population dedicated to sustainability. The project aims to demonstrate a society based on 100% renewable electricity. The project will also promote further investments in renewable generation capacity and decarbonising the heating and transportation systems. The basis for successful integration of renewables on an open and competitive market is possible by developing a flexibility trading platform.