high absorption rate, hail resistance, supply hot water in 24hours , anti-corrosion Evacuated tubeDia* length 47*1500mm, 58* ... -45Electrical heater1500w, 2000w, 2500wTank capacity90,100,120,150,180,200,240,250,280,300,350Tube quantity10-35Preservation hours72 hoursInstallation angle28-45Connection ...