Our thermal water heater system model is popular in India, it is always used with our 8L side assistant tank. On the one hand, it can feed water automatically, on the other hand, it can be seen as the air vent to decrease the pressure in the tank.
Also it is popular in many countries in Africa and in South America.
1.High efficiency with three target coating vacuum tube
2.Operated without any power supplying
3.1.5kw 2.0kw 2.5kw electric heater can be used as heating back up in cloudy and rainy days
4.Install on slope roof or flat roof easily