What is a kWh? kW and kWh explained | OVO Ener
So, for example, the 10,000 watt electric shower in the top bullet point above could also be called a 10 kilowatt shower. A kilowatt hour (kWh) is a measure of energy. So a 1,000 watt drill needs 1,000 watts (1 kW) of power to make it work, and uses 1 kWh of energy in an hour.