Understanding the difference between kilowatts (kW) and kilowatt-hours (kWh)

Knowing how to distinguish kW and kWh is essential for analyzing your consumption and, therefore, for correctly reading your electricity bill.

In this article, we will define kilowatt and kilowatt-hour and indicate the main differences between these two units of measurement for electrical energy.

What is a kilowatt?

Since the watt is very small compared to the power that a residential electrical system can consume, it is common to use the kilowatt as a unit of measure.

Normally, 3 kW are sufficient for most homes if you use basic appliances, while 4.5 kW if you have more air conditioners. In some cases, 6 kW can be reached when there are heat pumps and 10 kW with high-power electric tools.

What is instantaneous power?