Electric costs are easy to compute. I am often asked how much it costs to run a submersible pump and if there is a difference between brands. I will use the example of a 100 watt light bulb and a utility cost of $0.08 per KWH. A KWH is a kilowatt-hour or, 1,000 watts used for 1 hour. A 100 watt light - .1 kilowatt or .1 KWH = less that 1 cent per hour.
• Find the actual wattage used by the motor. (If the actual amp draw is not available, estimate by using the full load amps plate.)
• Watts = volts x amps for single phase motors. The light bulb has an amp draw of 8.7 x 115 volts = 100 watts.
• Compute your cost per month by multiplying the KWH x 24 (hours used per day) x 30 (days used per month) x cost in KWH (to find the actual cost look at your last power bill and divide the total power charges byt KWH used).
A good general rule to use when buying a pump is the following: Usually the more expensive the pump is the less electricity it will use.
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