Skylight compact pressurized solar water heater takes advantage of the vacuum tubes which has the property of high absorptivity and low emissivity, and transfer swiftly the heat absorbed to the water by heat pipe inside the vacuum tubes.This kind of solar water heater can operate efficiently from summer to winter, and afraid not the frost cleft of the vacuum tubes. 1. Uni-directional heat transmission 2. Can start from lower temperature 3. Faster transmission 4. Lower heat capacity 5. Low temperature resistance 6. Freeze-proofing 7. High frequency soldering inner tank 8. Rating pressure is 0.6mpaú¼0.4mpa separately, can connect directly with the city water system 9. No water in the vacuum tubes eradicates the incrustation scale, thus keeping them running in high efficiency, 10. No water in the vacuum tubes eradicates the leakage due to the aging of silica gel gasket or broken of the tubes,