... Use the electric heating water tank specially for solar water heater. 4) Double energy: You could use hot water at any time in ... Use the electric heating water tank specially for solar water heater. 4) Double energy: You could use hot water at any time in ... 4) Water capacity: 100L, 150L, 200L, 250L, 300L, 350L, 400L, 450L, 500L 5) Pressure: 6 bar China Domestic Split Pressurized Solar Hot Water Tanks ...