What is a kilowatt hour
(kWh)? by Andrew Sendy,
4/3/19
What is a kilowatt? A kilowatt is simply a measure of energy equal to one thousand watts (1000 watts) of electricity. It has no reference to the time over which the energy is used it is just an instant measure of power. Appliances such as solar panels or generators are often rated in kilowatts, being the peak amount of power the appliance can produce (in the case of a generator) or consumer (in the case of an air-conditioner). What is the abbreviation for a kilowatt?
What is a kilowatt hour? A kilowatt hour is a unit of electrical energy you will see on your energy bill. It is equivalent to a single 1000 watt (1 kW) device used continually for 1 hour.
What is the difference between kW and kWh?
What is the kW to kWh conversion?
How much does a kWh cost?
What is the abbreviation for kilowatt hour? The abbreviation for a kilowatt hour is kWh. How many kWh per day does the average home use? The average kilowatt hours used by a home in America is 867 kilowatt hours per month meaning the average kWh per day use is approximately 29 kWh per day.
What is a watt? A watt of electricity is a measure of power.
Some examples of how to calculate kilowatt hours (kWh) of usage from specific devices in your home:
What's best to cut kWh use on your electric bill, energy efficiency or solar? The potential to reduce the kWh of electricity you use through energy efficiency depends on how much power you currently use, how efficient your appliances are at using electricity and whether or not you are prepared to make lifestyle changes to save energy. In some instances, there are significant potential savings from energy efficiency measures.
Find out what a solar system produces in your area!
The
abbreviation for a kilowatt is kW.
Power= Current (Amps) x Voltage: P= I x V.
A
kilowatt hour is a measure of total energy and it refers to the amount of
energy used over a period of time. It is the electrical draw of the appliance
in kilowatts (so a 10 watt light bulb is 0.01 kW) multiplied by the time the
appliance is used. A kilowatt is simply a number that represents the electrical
peak draw of an appliance. A kilowatt hour refers to the actual energy used
because it incorporates a measure of how long the electrical energy was used
for.
There
is no direct conversion from kW to kWh in that they are different things.
However, you get kWh’s by multiplying the kW’s used by the number of hours it
is used for. So a one kilowatt appliance used for 1 hour would use 1 kWh.
According
to the Energy Information Administration the average energy cost of a
kilowatt hour of electricity in the US in 2019 is around 13 cents per kilowatt
hour. However, this number varies a lot around the country and in states like
California, Massachusetts and several others the average cost of electricity is
around 20 cents.
Power,
in turn, is a function of the voltage of a circuit multiplied by the current. What is a watt hour? A watt hour is
0.001 of a kilowatt hour and is equivalent to one watt of energy being used
continually for an hour.
You
can work out how many kilowatt hours each appliance in your home used by
multiplying the peak drawing capacity of the appliance by the amount of time it
is used.
One
kWh of electrical energy would also be used in each of the following cases:
a single
20 Watt light bulb was used for 50 hours; or
one
hundred 20 watt light bulbs were used for 30 minutes;
or A
television that uses 100 watts was left on for 10 hours per day;
or A 10
kilowatt kW HVAC, using 10,000 watts, was run for six minutes to cool your home
when you arrive home from work.
kWh
of energy is the standard unit in which power is bought and sold to consumers.
However,
for most people who own single-family homes in areas with high power prices,
there are far greater potential savings from solar panel
installation.
Norb
Leahy, Dunwoody GA Tea Party Leader
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