What are Kilowatts?
According to the US Department of Energy, 40% of all electricity used to power home electronics is consumed while the products are turned off, though not unplugged. So even though the appliances, clocks, radios, computers, lamps are turned off they are still adding to your kWh total. Think about items you use less frequently around the house and unplug them. Help bring your energy bill down and your carbon footprint.
It is important to understand how much power you are using as you try to get your carbon footprint under control. If you are confused about your power bill and what it means, this should be a help.
A watt is a unit of energy use often applied to electricity. If you liken electricity flowing through metal wires to the water flowing through a garden hose, the watts would be the amount of water, the volts would be the pressure, and the amps are the size of the hose.
A kilowatt-hour (kWh) is a unit of energy equal to one kilowatt (1000 watts) of power running or being used for one hour of time. For example, if you are cooking a chicken in your 800 watt toaster oven, and reading a book under four 50 watt incandescent light bulbs, you would be using 1000 watts of energy, or 1 kilowatt. If this went on for one hour, it would be one kilowatt hour of energy use.
The energy consumed by businesses and homes if often expressed in Kilowatt-hours. A megawatt-hour is equivalent to 1000 kWh and is most often used by larger business and institutions. A kilowatt-hour measures electrical energy whereas a kilowatt measures available power.
If one were so inclined you could use kW and ‘time’ to find the amount of Energy expressed in kWh.
Energy = Power * Time
So a 2.5 kW electric heater which runs for 5 hours would have a value of 12.5kWh.
Familiarity with kilowatt-hours can make figuring out your carbon footprint easier. Once you have a background of the language and items needed to figure out a carbon footprint you will have that much more faith in its accuracy as you are comfortable with where the data is coming from and why. Knowing that you have a 1200 watt microwave is nice, but it won’t get you very far in figuring out your footprint unless you know how long it runs. Using your electricity bill to find kilowatt-hours will help you when calculating your carbon footprint as it takes into consideration the amount of time.
-Angie