Solar water heater

1) Tank
Tank material ( exterior) : Painted steel thickness: 0.41mm
Tank material ( interior) : SUS304 2B stainless steel, Thickness: 0.4mm
Tank Capacity: 150L - 300L
Outer Tank Diameter: 460mm Inner tank diameter: 350mm
Insulation: 55mm polyurethane foam
2) Vacuum tube Or three target tube
Outer Diemater: ¦ 58mm Inner Diemater: ¦ 47 Wall thickness: 1.6mm
Length: 1800mm Tube material: Borosilicat glass 3.3
3) Support : Galvanized Steel Thickness: 1.5 mm
Tubes and supports are adjustable