9 Installations for the utilization of solar energy and parts thereof; Solar collectors for the utilization of light (photovoltaic), in particular for use in power plants and for decentralized use; Solar collectors for the generation of power and heat; Concentrators for the concentration of light, parts of concentrators; Concentrators made from plastic membranes for the concentration of light, parts of concentrators; Absorbers for the utilization of concentrated light (photovoltaic); Absorbers for the utilization of concentrated light for the generation of power and of heat; Frames for solar collectors (photovoltaic) and parts thereof, frames for solar collectors and parts thereof made from concrete; Drive for tracking the sun's position for solar collectors and secondary concentrators; controls for the operation of solar collectors (photovoltaic) and their components; Software for the operation of solar power plants, solar collectors, tracking drives, concentrators, absorbers, heat storage units, the circulation of fluid transporting heat, and for the management of a heat flow