solar collector 1) High-speed conducting, less heat loss Low starting temperature (60), high-speed conducting (6m/s),small thermal space, less heat resistance. Degree of vacuum inside tubes up to 1.0*103Pa ensures heat preservation, One way heat conducting components ensure no heat conducting backwards in cloud day or at night, no heat loss. 2) High efficiency and pressurization Daily heat efficiency up to 60% averagely. The whole collector can bear pressure up to 0.8 MPA which can be connected with urban running water system directly and runs automatically. 3) No pipe crack, no incrustation Conducting components can be used in cold area without water freezing for the isolation of pipes and water. Collector operates normally with low running pressure even high temperature to pipe wall or without water in tank. No incrustation in pipe inner wall improves the quality of water and low efficiency results from incrustation. 4) Stable, durable Water tank and heat transferring box are sealed mechanically without leak. 5) Modular design, easy for installation and operation, safe and reliable, elegant appearance Patented conducting substance is compatible with normal metal material that results in non-condensable gas and non-stop running within 15 years and long duration for the collector