Features: 1) Working principle of high pressure solar heater: utilizes alternative absorbing coating on inner surface of vacuum tube, and super conductive tubes lead heat to water tank from high temperature environment and then produces hot water 2) Easy to use and convenient to install 3) Can be put in courtyard, on roof or balcony 4) Inlet water hole connected to tap water and outlet hole connected to tap water. Outlet hole produces pressure hot water directly 5) Working principle of low pressure solar heater: absorbs solar energy and heated water in vacuum tube directly through cold hot water convection, then changes solar energy into heat energy to store in water tank 6) Adopts double-deck highly special hard glass tube of boron silicone 7) Double-deck glass coaxial structure, intermediate layer releases vacuum, maintains 5 x 10-2Pa high vacuum for a long time while in charge offing 8) Magnetism accuse of alternative absorption coating, AL / N / AL of sputter aluminum nitrogen aluminum alternative absorption coating solar radiation absorption rate at 93% and hot emittance of 6% 9) Long performance life: 15 years 10) Thermal efficiency is good through the whole year 11) Capacity from 500L to 100 metric tons Yaning