In this lecture various renewable energy sources are discussed, materials as basic materials for device fabrication, which include: (1) materials for rechargeable batteries and supercapacitors or ultracapacitors which include their components, namely electrodes (anode, cathode), electrolyte and separator ; (2) semiconductor materials (crystal & amorphous silicon, organic, polymer), PN junction, LED, DSSC and for Photovoltaics (Solar Cells). Discussing various other renewable energy sources, which have great potential to be developed in Indonesia, such as: (3) energy using water (hydroelectric-energy) which has enormous potential to be developed in Indonesia for added value in dam buildings; (4) geothermal energy (hydrothermal energy) and PLTP in Indonesia; (5) biomass-based energy which is climate-friendly oriented, fast-growing trees and bamboo, biodiesel, bioethanol, etc. ; (6) nuclear energy as an energy source with carbon emissions; and (7) the potential of hydrogen as a very abundant future energy source.