The decarbonisation of islands’ energy systems requires unique solutions due to their isolated geographies. IANOS, a Horizon2020 European Commission funded project running 2020 to 2025, aims to harness innovative renewable energy technologies on two lighthouse islands: Terceira and Ameland to progress their island’s energy autonomy. The main objectives of IANOS’s demonstration, targeted by different use cases, is linked to island-level RES self-consumption maximisation and curtailment minimisation, while improving grid resilience and reliability towards a progressive decarbonisation of the island’s energy mix. This paper presents the methodology and early results of the installed technologies for the Terceira demonstration in the Terra Chã neighbourhood managed by an intelligent virtual power plant (iVPP). These already installed technologies include PV panels, heat batteries, electric water heaters, smart solar inverters, hybrid transformer, and a flywheel.