500L unpressurized solar water heaters with vacuum tubes

1. material of inner tank: SUS304-2B food grade stainless steel
Thickness: 0.4mm

2. material of outer tank:Color steel
Thickness: 0.4mm

3. bracket materail:Galvanized plate Thickness:1.50mm

4. Material of inner manifold: SUS304-2B food grade stainless steel

5. Material of outer manifold: flash silver plate

6. heat preservation: 72-80h

7. insulation :55mm foaming

8. Absorption rate:=93%,Heat radiation rate:=6%(100?)

9.Angle:30°
500L unpressurized solar water heaters with vacuum tubes