... years warrany Sunrise compact pressurized vacuum tube solar collector Features:1. This system consists of solar vacuum tube, heat pipe, ... electric water heater. electric water heater. Specification:1. Water tank inner shell: 1.5mm SUS304-2B (food grade stainless steel). ... degree, 30 degree, 38 degree, 45 degree.P.S. 1. Controller can display the temperature, water level, automatically water loading etc ...