Internationally recognized energy-related research, development and innovation (R&D&I) competence centre providing services as an Open Access Centre for Future Energy Technologies. LEI strategic R&D topics: • Energy and biofuels from biomass and waste; Research in development and upgrade of associated technologies; • Energy storage technologies; • Smart energy grids; • Nuclear energy (Safety analysis, Decommissioning, Radioactive waste management, New generation nuclear reactors, Fusion energy); • Environmental engineering and climate change influence on water resources; • Metrology research related with development and maintenance of national liquid and gas flow standards (etalons); • Materials science for energy generation technologies; • Energy economy research (Energyy policy, Energy strategy, Social and macroeconomic impact assessment, Energy market research, Energy Efficiency).