Definition: A kilowatt-hour (kWh)measures a unit of energy, equal to 3,600,000 joules (3.6 MJ). It can also be described as the amount of energy that would be transferred at a constant rate of one kilowatt for one hour. This is the unit that is used by power companies to determine the amount of energy used by a home or business for billing purposes.
Also Known As: kilowatt-hour, hWh, kilowatt-hr
Common Misspellings: killowatt per hour, killowatt-hour