NOVELTY - The system comprises a solar thermal collector (26) that includes a translucent fiberglass reinforced (FRP) plastics. The fluid connectors are in communication with the solar thermal collector, pump, valve, storage tank (29) and boiler (28). The fluid flow within the main portion is controlled by the controller (25). The translucent FRP panel comprises high-strength, high-temperature resin, and the translucent FRP panel is about 30% glass content. The panel comprises first and second layers that comprise a thermoplastic material which is polysulfone resin.    USE - Solar thermal system used for solar thermal applications or distributed solar thermal applications.    ADVANTAGE - The flat-plate collector is most cost effective unit of using the sun to provide energy. The lower cost, more efficient way of producing energy from the sun that can utilized to provide more domestic hot water, space heating and space cooling at a lower cost is employed. The system is cost-effective to be utilized for the high volume industrial energy products such as process heating and process cooling. The FRP is very durable in a wide range of applications, has a longer life, resists high temperatures, and resists attack by virtually all fluids. The collector is durable, lightweight and use low-cost materials in production manufacturing process. The collector is lighter and easier to install. Since the fluid contained within the device converts the sun energy to heat directly by absorption in addition to conduction from the collector, the higher efficiency in the conversion of the energy of the sun to usable heat is employed. The materials of construction cost less and are less energy intensive to produce and no fluctuation in terms of price due the idiosyncrasies of the commodities market.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method for heating fluid; and    (2) a method for manufacturing portion of solar thermal collector system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the solar thermal collector operating system.    Controller (25)    Solar thermal collector (26)    Boiler (28)    Storage tank (29)    Hot water (31)