solar system

Non-pressure Solar Water Heater
Features;
1) Inner water tank shell is made of SUS304-2B food grade stainless steel plates,
and outer tank shell is made of color steel plates, welded by argon arc. Water is
pure and drinkable
2) Heat insulation of water tanks adopts polyurethane foam and the thickness is 55mm
3) Silicon rings to connect and seal them
4) The life of the water heater can be 20 years.
5) Whole  strong borosilicate vacuum tubes adopt super hard borax and silica glass
6) Absorption rate: =93%, thermal radiation rate: =6%
7) It resists 25mm hail
8) Temperature when exposed to sun without water: 250°C, 2 hours to boiling
point if using single tube
9) If you use electrical appliances, it will begin to work when the temperature of
the water is below 60°C, and will switch off automatically when the temperature
reached 60°C.
10) You have to test the water temperature before using, in order to avoid scalding