Kilowatt-hour (kWh)
The unit of energy your utility bills you for — one kilowatt of power used for one hour.
A kilowatt-hour is how much electricity you consume or a solar system produces over time, and it's the unit on your power bill. A kilowatt (kW) is the instantaneous rate; a kilowatt-hour (kWh) is that rate sustained for an hour. A typical U.S. home uses about 850–1,100 kWh a month, and solar sizing starts by estimating your annual kWh.
Put it to work
See also