Difference between revisions of "Calculate Wattage"
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| − | + | There is a very simple calculation equation for computing watt usage for an electronic device. All you need to know is the number of amperes (amps) and the number of volts for the device. Understanding watts is important because it can help you save money and energy. | |
| − | [[Category:Measuring Power Current and Energy]] | + | [[Category: Measuring Power Current and Energy]] |
== Steps == | == Steps == | ||
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#*Do simple subtraction to determine the watt difference. In this case, that is 77 watts (100-23). Utility companies will often charge you using kilowatts. To find out the number of kilowatts, take the number of watts divided by 1,000. Then take the number of kilowatts multiplied by your hours of usage. This is the kilowatt/hr. Then, take kilowatt/hr and multiply that number by the cost of your energy. This is your annual cost. | #*Do simple subtraction to determine the watt difference. In this case, that is 77 watts (100-23). Utility companies will often charge you using kilowatts. To find out the number of kilowatts, take the number of watts divided by 1,000. Then take the number of kilowatts multiplied by your hours of usage. This is the kilowatt/hr. Then, take kilowatt/hr and multiply that number by the cost of your energy. This is your annual cost. | ||
#*For example, let’s say you have 10 lights. They are each 100 watts. 10 X 100 = 1,000 watts. 1,000 Watts divided by 1,000 = 1 kw. Let’s say you’ve used 2,000 hours of energy. Thus, 1kw X 2,000 hours per year = 2,000 kwh. Let’s say your utility company charges you 10 cents for every kilowatt hour. You would take 2,000 kwh X .10 = $200, That's what it would cost you to use those bulbs for the year. | #*For example, let’s say you have 10 lights. They are each 100 watts. 10 X 100 = 1,000 watts. 1,000 Watts divided by 1,000 = 1 kw. Let’s say you’ve used 2,000 hours of energy. Thus, 1kw X 2,000 hours per year = 2,000 kwh. Let’s say your utility company charges you 10 cents for every kilowatt hour. You would take 2,000 kwh X .10 = $200, That's what it would cost you to use those bulbs for the year. | ||
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== Tips == | == Tips == | ||
*Be sure to allow for a small amount of "phantom" wattage for each device plugged into the circuit/inverter. Many electrical items continue to use power when they are turned off. This particularly true of anything that shows an LED light when it is off. | *Be sure to allow for a small amount of "phantom" wattage for each device plugged into the circuit/inverter. Many electrical items continue to use power when they are turned off. This particularly true of anything that shows an LED light when it is off. | ||
