Concentrating solar-thermal power (CSP) systems use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat, which can then be used to produce electricity or stored for later use. It is used primarily in very large power plants. . Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. Below, you can find resources and information on the. . A solar power tower at Crescent Dunes Solar Energy Project concentrating light via 10,000 mirrored heliostats, occupying an area of 13 million sq ft (1. Although many people think of photovoltaic (PV) cells when thinking about solar power, CSP. . To generate most electricity worldwide, steam is used to turn a turbine that is connected to a generator. Professor of Engineering, Pennsylvania State University. CSP technology utilizes focused sunlight.