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Pump Operating Costs (Reprinted from Pond Droppings) What is it going to cost you to run that new pump, or UV light system, or the air blower you are thinking of installing? For most of us, electric codes are gibberish that we guess at, numbers we ignore in hopes that everything will come out okay. But there is an easy way to figure power consumption for any electrical motor. The formula is: Amps x Volts = Watts Watts divided by 1000 = Kilowatts Kilowatts x hours used = KWH KWH @ your price per KWH = cost Assume that: A new pump has a plate that states the motor is rated at 2.15 amps, and you plug this pump into a standard 120 volt electric box. You plan to run the pump constantly, which means 24 hours a day, 30 days a month, for a total of 720 KWH, or kilowatt-hours, per month. We will assume that your utility company charges 7 cents per KWH. Your costs on this one may vary. So, The cost would be: 2.15 x 125 = 269 watts 269 watts divided by 1000 = 0.269 kilowatts 0.269 kilowatts x 720 hours = 193.5 KWH 193.5 KWH x $0.07 = $13.54 This means this one pump will cost $13 to run for the entire month. If you do your homework before you buy equipment, you can easily pay for a more efficient device through electric cost savings alone in a very short time. |
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