FLEXnCONFU, covering the whole value chain, is a pioneer “demonstration to market” project which will contribute to the valorisation of European Gas Turbine (GT) and Power to Gas scientific and technological competencies, and to the creation of a clean hydrogen/ammonia society. Within FLEXnCONFU project, to level the CC load, the electricity production could be converted in H2 or NH3 as carbon free fuels via P2X2P application, to in turn be locally re-used in the same power plant to respond to varying demand. This solution will be demonstrated up to the Technology Readiness Level (TRL) 6 deploying a Power-to-Ammonia system in a relevant environment (a MGT operating in a smart grid context, Savona lab) and up to TRL 7 installing a power-to-hydrogen system in a real operational environment (EDPP’s Ribatejo power plant). To exploit the potential of NH3 combustion in reducing CO2 emission, combustion tests up to 100% NH3 will be performed in a heavy duty representative GT combustion system (Cardiff University combustion lab). The new FLEXnCONFU layout will unlock the current situation of low operating-hours CCGT power plants by providing secure back-up and improving CCs flexibility as well as overall efficiency, allowing a smoother operation, reducing air pollutant emissions. The FLEXnCONFU system can be coupled to both combined heat and power CC and natural gas CC as well as to coal integrated gasification combined cycle, so guaranteeing a wide replicability potential and a cleaner EU fossil based power plant fleet.