The increasing share of Renewable Energy Sources (RES) in the energy mix brings the necessity to find innovative and efficient methods for long-term energy storage. Recyclable electrofuels are a promising solution, allowing to store electrical energy in a compact and safe way through energy-dense materials thanks to Power-to-Power cycles. Among them, aluminium shows many advantages such as safety, efficiency, and sustainability. In charging phase, pure electricity is exploited to produce aluminium thanks to electrochemical processes in centralized smelters; in the discharging phase the metal is oxidized in air or water, returning part of the energy previously stored. In this work, a comprehensive assessment of aluminium as energy vector is performed, starting from a theoretical thermodynamic analysis of the chemical redox reactions involved in the production and utilization of the metal, leading to a theoretical energy density of 23.3 kWh/l.