The water in the water tank will not freeze, but it is easy to freeze because the pipes are not well insulated. Once the pipes freeze, the water in the tank can no longer drain, regardless of the temperature. If you have electric heat tape installed on your pipes, you do not need to drain the water. If the pipe is frozen, plug in the electric heating tape to thaw it. If electric heating tape is not installed, it is recommended to drain the water.
An insulated water tank is a container for storing hot water. The hot water collected by the collector tube should be stored in an insulated water tank to avoid heat loss. The capacity of a solar water heater refers to the capacity of water that can be used in the water heater, excluding the capacity that cannot be used in the vacuum tube. For pressurized solar water heaters, its capacity refers to the capacity of the milihad in which heat exchange can take place. The solar water heater first enters cold water into the hot water storage tank, then transfers the heat to the insulated water tank via the collector. The hot water storage tank is connected to the indoor cold and hot water pipes, allowing the entire system to form a closed loop.