The aim of the SCARABEUS project is to demonstrate that the application of supercritical CO₂ blends to CSP plants has the potential to reduce CAPEX by 30% and OPEX by 35% with respect to state-of-the-art steam cycles, thus exceeding the reduction achievable with standard supercritical CO₂ technology. This translates into a LCoE lower than 96 €/MWh, which is 30% lower than currently possible. The project will demonstrate the innovative fluid and newly developed heatexchangers at a relevant scale (300 kWth) for 300 h in a CSP-like operating environment.