what is watt hour
The watt-hour (symbolized Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time.The watt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications.An energy expenditure of 1 Wh represents 3600 joule s (3.600 x 10 3 J).To obtain joules when watt-hours are known, multiply by 3.600 x 10 3.he watt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications. An energy expenditure of 1 Wh represents 3600 joule s (3.600 x 10 3 J). To obtain joules when watt-hours are known, multiply by 3.600 x 10 3.