Inner and outside water tank shell all are made of SUS3042B food grade stainless steel plates, welded by argon arc.

55mm polyurethane foam heat insulation
imported cold rolling and 3-level corrosion treatment steel stand
Whole glass vacuum tubes adopt super hard borax and silica glass
Absorb rate: =93%
Automatic transfer of solar power to ecectrical power automatic water feed
Resist 25mm hail, using life can last 15years.
Automatically switch to ecectric heating
The tubes and supports are adjustable and pwoer bearing is average.