watt-hour

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watt-hour

[′wät ¦au̇r]
(electricity)
A unit of energy used in electrical measurements, equal to the energy converted or consumed at a rate of 1 watt during a period of 1 hour, or to 3600 joules. Abbreviated Wh.

watt-hour

A unit of work equal to 3,600 joules; equivalent to the power of 1 watt operating for a period of 1 hour.

watt-hour

The power utilization for one hour measured in watts. Abbreviated "Wh," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliwatt-hour (mWh) rating is used. For example, a 500 mWh battery means it will release 500 watts at a specific voltage for one hour before it is discharged. See ampere-hour and watt.
References in periodicals archive ?
Off-system megawatthours sold increased 53% over 2002 while the average price per megawatthour increased 43%.
Off-system megawatthours sold increased 43 percent over 2001 while the average price per megawatthour increased 6 percent.
BUSINESS WIRE)--May 1, 1997--Green Mountain Power Corporation's energy efficiency programs helped customers reduce their use of electricity by more than 10,000 megawatthours in 1996, which is 15 percent more than expected.
The energy efficiency programs that Green Mountain Power has put into effect over the past five years have a cumulative effect of saving GMP customers more than 64,000 megawatthours of electricity annually, which is approximately the amount of electricity used by all the homes in Shelburne and South Burlington in a year.
In announcing the results of GMP's efficiency efforts, Kelley noted that energy savings for 1995 were 9,198 megawatthours, 15 percent above the amount targeted.
Cumulative annual energy savings resulting from efficiency programs from 1992 through 1995 are 53,569 megawatthours.
Through an affiliate, CNG Energy Services is the fourth largest wholesale power marketer in the United States, with sales of nearly 2 million megawatthours in 1995.
during 1994 will save 14,443 megawatthours of electricity a year, exceeding company goals by 16 percent, Paul A.
In issuing the company's annual report on its demand-side management programs, which are designed to influence customers to use electricity more efficiently, Barnett said that since 1991, GMP has installed efficiency technologies that save 44,450 megawatthours annually.
Off-system megawatthours sold increased 51 percent over the prior year, while the average price per megawatthour for off-system sales was approximately 22 percent lower than the average price for the comparable period in 2001.