... efficiency 2,easyly installation, energy-saves 3,competitive price compacte non-pressuriced solar system One pipe inlet-outlet on the water tank, ... , 30, 36tubes 7) Capacity: 100-360 liters Solar water heater Remark: 1. Solar heat storage tank diameter(mm): 410/4602. Thickness ... tank, controller and electrical heater.Warranty: 3 years for full system / 15 years for vacuum tubeLead time: Within 2 weeks ...