calentador de agua solar 1.competitive price and high quality 2.beautifull design 3.easy to install 4.long warranty calentador de agua solar specifications Water Tank:1,Inner tank : SUS304-2B material ,150L-200L ,1.2mm thickness,300L-400L 1.5mm2,Insulation: 50mm polyurethane foam.3,Outer tank:0.5mm thickness galvanized steel material4,P/T relief valve,electrical heater element with terminator5, ...