ECO2Fuel aims to design, manufacture, operate, and validate the worldwide first low-temperature 1MW direct, electrochemical CO2 conversion system to produce economic and sustainable liquid e-fuels (C1-C4 alcohols) under industrially relevant conditions (TRL7). This will be achieved by the direct electrocatalytic reduction of CO2 using water and renewable electricity without hydrogen at temperatures and pressures below 80?C and 15 bar, respectively. Due to its compatibility to dynamic loads, the ECO2Fuel system allows the efficient and direct coupling to renewable energy sources (RES) or facilitating grid-balancing service. The ECO2Fuel system is based on a genuinely unique CO2 co-electrolysis technology developed under the Horizon 2020 project LOTER.CO2M. This system will be optimized to produce efficiently and selectively C1-C4 alcohols and upscaled from 5kW with an unpretentious approach to a size of 1MW within the ECO2Fuel project. The produced e-fuels will be evaluated as green alternative feedstock in two of Europe?s CO2 emission heavy sectors, transport and energy.