Electric water heaters are divided into: instant electric water heaters and storage electric water heaters.
The instant electric water heater can be heated instantly, with large power and automatic frequency conversion constant temperature, so no water storage is needed, which means that the instant electric water heater has no inner tank.
The storage electric water heater has an inner tank, which can be stored and heated in advance. The storage capacity is generally 40L, 60L, 80L, 100L, etc. It needs to be heated in advance after being filled with water, and the heating time is longer. However, The storage electric water heater is prone to scaling, and once the water tank is damaged, the maintenance cost is high.