Compact nonpressure solar water heater

1.TANK
Outer tank material:High quality painted steel (White) plate thickness 0.4mm;
Inner tank material:SUS304-2B food grade stainless steel plate thickness 0.31mm;
Heat preservation:72 Hr;
Insulation layer:high density polyurethane foam thickness 55mm ;
Holes:4 holes,water inlet and outlet,electrical heater,vent.
2.Vacuum tube
Model:47mm*1500mm , 58mm*1800mm , 58mm*2100mm;
double layer concentric borosilicate tempered 3.3 glass tube.
3.Bracket(Supporting frame)
Angle:45 degree;
Material :galvanized plate,thickness 1.2mm.

Assitant water tank,electrical heating element,controller,reflector is optional.