Principles and characteristics：

Auto charging water:When the storage tank water level is below the setting level, the solenoid valve will open, water in all solar water heaters go into storage tank, the float valve in the auto feeding tank will open to charge till the storage tank is full of water.

Electrical heater assistant:When the water temperature in the tank is below the setting data ,the electrical heater will start to heat the water till reach the setting data .

Each user can achieve metering water supply through the installation of the water table or the IC card implementation.