Abstract: The solar thermal collector system of this invention consists of an evacuated glass solar collector, a heat storage system, and a tubular heat pipe system to transfer heat from the evacuated glass solar collector directly to the heat source system. The evacuated glass solar collector has substantially parallel linear concentrating troughs with mirror surface in vacuum which concentrate, approximately ideally, solar radiation onto internal glass tubes coated with selective absorber. The selective absorber converts the concentrated solar radiation into heat. The tubular heat pipe system consists of a plurality heat pipes. The evaporating end of each tubular heat pipe receives heat from solar radiatiion and transfers it directly to the condensing end of the heat pipes. The condensing end of each metal heat pipe is in good thermal contact with the heat storage tank of the heat storage system.