How many kilowatt hours does a 40 liter water heater require per hour?

Electric water heater power consumption calculation

Based on the information provided, we can calculate the power used by the electric water heater in a day.

First of all, we know that the power of the electric water heater is 1500W, which means it consumes 1500 watts of electricity per hour.

Then, we need to know that the capacity of the electric water heater is 40L, that is, it can heat 40 liters of water.

According to the energy efficiency level 2, we can assume that the energy efficiency of the electric water heater is 80%.

Calculation process:

First, we need to convert the capacity of the electric water heater into liters per hour.

Since there are 24 hours in a day, we can divide 40 liters by 24 hours to get 1.67 liters per hour.

This means that the electric water heater will consume 1.67 liters of water per hour.

Then we need to convert the water consumed per hour into the electricity consumed per hour.

Based on the energy efficiency of 80%, we can calculate that the electricity consumed per hour is 1.67 liters * 1500W * 80% = 2004 watt hours.

Finally, we can calculate the electricity usage in a day.

Based on the power consumption per hour of 2004 watt hours, we can calculate that the power used in a day is 2004 watt hours * 24 hours = 48096 watt hours.

Therefore, an electric water heater uses approximately 48,096 watt hours of electricity per day.

Summary:

Based on the above calculations, the purchased Midea electric water heater with 1500W power, 40L capacity and level 2 energy efficiency will be turned on 24 hours a day. It will consume approximately 48,096 watt hours of power.