Photovoltaics (PV) have been to begin with entirely used to be a source of electricity for small and medium-sized applications, in the calculator powered by one solar cell to distant homes powered by an off-grid rooftop PV system. Industrial concentrated solar power plants have been initially designed from the eighties. https://angelovsnkc.thechapblog.com/29055010/details-fiction-and-new-technology-for-solar-power