The solar energy source: Altitude and tilt angles, sun path diagrams for shading analysis, clear sky insolation. Photovoltaic materials and electrical characteristics. Photovoltaic cell model, modules and arrays, I-V curves under standard test conditions and shading impacts. Crystalline silicon and thin film technologies. Photovoltaic systems: Current-voltage curves for loads. Grid connected and stand-alone systems. Wind energy systems: Types of wind turbines, power in the wind, wind turbine generators, speed control of generators, wind turbine economics. Power system quality: current and voltage total harmonic distortion, harmonics sources, effects and mitigation. Voltage flickers, sags and swells.