... no water goes into the tube and there are no incrustation, no bursting. Moreover, water can go upward at anytime. 3.Use solar ... electric heating water tank specially for solar water heater. 5.Double energy: You could use hot water at any time in a day because solar water heater also has ... (thickness: 1.2 mm)6.Collector tube dimensions: 58mm*1.8m, 47mm*1.5m 7.Water capacity: 100L, 150L, 200L, 250L , ...