Abstract: This patent application discloses structure and use of concentrated solar thermal energy collector modules, installed individually, or in an array configuration. Because of the modular design, the individual collector modules are easier to manufacture, transport, and install. Systems of varying scale and varying thermal output may be built by custom arrangement of individual collector modules. Each module comprises a tiltable mirror array, a support frame for the mirror array, a heat absorption tube at a focal point of the mirror array, a parabolic mirror concentrator above the heat absorption tube, and two transparent protective panels coupled between the mirror concentrator with the support frame. The heat absorption tube may be a sealed heat tube, or a fluid circulation conduit. The mirrors are configured to be positionally adjusted to improve focusing of thermal energy and/or to track the changing position of the sun.