SOLARSCO2OL is an EU H2020 funded project aiming at developing an innovative, economically viable and easily replicable supercritical CO2 (sCO2) power block for demonstrating the use of sCO2 cycles as a potential key technology to increase the flexibility of concentrated solar power (CSP) plants, also studying their hybridization with PV plants thanks to the integration of an electric heater that properly coupled with molten salt (MS) storage tank can facilitate the integration of sCO2 power blocks with state of the art CSP plants/solar fields. This will reduce their Levelised Cost of Electricity (LCOE) to values below 10 c€/kWh in Europe and promote an innovative power plant cycle layout not requiring water.