Renewable energy sources are the essential key to mankind's energy future. Investigating the basic attributes of renewable energy sources is required to assess their potentials and related costs. At the outset, the IPCC (2012) special report on Renewable Energy Sources and Climate Change Mitigation is reviewed. Screening of EU and Flemish policies intended to promote renewable energy investments provides insight in the performance of the particular policy instruments. The introduction to the renewable energy world is completed with reference to various roadmaps for the deployment of distributed and large-scale renewable energy installations. Next, specialists teach the essentials and latest developments in wind power, solar power & heat, hydro and geothermal energy, biomass, biofuels and energy crops. Because the spearhead in renewable energy development now takes place in the generation and supply of electricity, a day is devoted to electricity system transitions with variable power in integrated generation systems, smart distribution grids, smart meters, and prosumer regulation. The module concludes with the practice of renewable energy deployment, approached from a bottom-up, distributed, small-scale development and from a top-down, centralized and large-scale approach, and on how they match or exclude one another.