... Environmental protection Absorber area efficiency C portable solar system,portable solar energy,mini solar system msl05-04Features:Off-grid power ... benefit, is widespread used now.Solar home system in details as following:1.Outer water tank: non-corrodible colorful steel, ... stainless steel(food class),0.5mm thickness.3.Vacuum tube:58mmx1800mm(58mm=Diameter,1800mm=Length),higher efficiency, lower heat ...