Heliostats and components therefor, namely, reflective mirrors, control systems, namely, electric or electronic controllers, electronic motor controllers and electronic controls for motors, and drive systems, namely, electric motors, gears and power supplies; boiler control systems consisting of computer hardware and software and computer-controlled valves for operation of solar power stations and solar steam production plants; computer hardware and software for monitoring and controlling the operation of solar power stations; apparatus for converting solar radiation to electrical energy, namely, photovoltaic solar modules; solar cells; solar radiation-related tracking systems, namely, computer hardware and software for tracking solar radiation levels for solar power plants for the generation of electrical energy; apparatuses and instruments for the transformation of electronic radiation to electrical energy, for converting solar radiation to electrical energy, namely, photovoltaic solar modules and photovoltaic solar cells; inverters; integrated circuit modules for use with infrared detectors; actuators, namely, electric actuators