System composition◆ Vacuum tube Vacuum tube is the collecting energy Component in the system which has the same function as electric tube in electric water heater. But the difference between solar water heater and electric water heater and gas water heater is that the solar water heater absorbs the radiant heat energy of sun, therefore, the time of heating must be in the sun shining day. Insulating water tank Insulating water tanks of solar water heaters are the same as those of electric water heaters in storage of water. we know the solar water heaters work at daytime, while people usually use the hot water at night, so the hot water produced in daytime must be stored by insulating water tanks. The capacity of the tank is the sum of the volume water people should use at night. The Insulating water tanks of solar water heaters are good at heat preservation, corrosion-resistant, anti-pollution and has long service life as above 15 years Stand The material of stand is th
