Abstract: A solar window system designed to be fitted into a window frame of a building or over an existing window, the invention window system functioning as a combination shade awning, solar reflector and thermal-security shutter. The invention solar window system comprises a frame, an adjustable insulated panel having reflective surfaces and supporting adjusting means for the panel. Glass may or may not be fitted into the frame depending upon the solar window system's intended use. According to the adjustment of the panel, the invention window system can function as a shade awning, as a solar reflector, or as a thermal-security shutter.