The book addresses questions about the role and place of photoenergy in global energy in general. A historical excursion was conducted on the history of the development of work on the photoelectric conversion of solar radiation both in Russia and around the world. The physical properties of light in conjunction with the physical processes on the Sun, which is a thermonuclear reactor, are considered. Basic concepts about solar power plants are presented. Physical principles of photoelectric conversion of solar radiation are considered; issues of making classical solar cells based on crystalline silicon, solar cells of other structures, technology for producing solar modules, including the original technology for producing modules with an extended service life.