Modern technologies for the conversion of renewable energy sources (RES) are considered, including the energy use of solar radiation to produce electricity, heat and cold, wind flows, biomass, geothermal fluids, small water flows and low-potential heat, as well as “key” technologies for short-term and long-term heat storage. and electricity. The generalized indicators of the scale and efficiency of the practical application of RES in the world and Russia, the achieved technical and economic indicators of power plants based on RES of various types are presented, and the trends in their change since the beginning of the new century are analyzed.