Energy and renewable energy sources (the value of energy, renewable energy sources classification, clean technologies). Biomass: biomass characteristics and biomass classification, technologies and systems for biomass utilization (combustion, gasification and pyrolysis), biofuels (biodiesel, biogas). Solar energy: resources, solar technologies (photovoltaic (PV) and solar thermal conversion), solar systems (PV stand alone and utility interactive systems; distributed and central receiver systems). Wind energy: resources (wind characteristics), wind energy utilization, choosing location for wind turbines installation, vertical and horizontal axis wind turbines, systems based on wind energy (stand alone and utility interactive systems), technical problems and solutions. Hydro energy: resources, utilization of water power, estimation of available energy, impulse and reaction turbines, hydropower plants as part of electric power system, small hydropower plant. Geothermal energy: types of geothermal sources, resources, technologies and systems for geothermal energy utilization (direct and indirect utilization). Energy storage: primary energy storage (solid, liquid and gaseous fuels), thermal, mechanical, electrical, biological energy storage. Techno-economic analysis of application of renewable energy sources with case studies.