http://www.EnergySavingPumps.com use "Super Premium Efficient" 3-phase motors made to our specifications with variable frequency drive controllers (vfdc) that convert the residential single phase to 3-phase power. These VFDC's put a "gas pedal" on each pump. They allow the consumer to have a dial to select any speed from 0 to 100% so they are much better than 2-speed pumps, since they are in fact 100-speed pumps. They are also available with programmable PLC's to automatically reduce speed and power usage at peak energy usage times, which is analogous to set-back thermostats.
They "meet or exceed the rebate levels suggested by the Consortium for Energy Efficiency (CEE) and followed by most utilities".
A big advantage is they are more flexible and can go anywhere outside of or in between the high range of 2-speed pumps and the low setting. For example, let's look at a consumer that has a 2-speed 1 HP on high (10.3 amps at 115V), and 1/8 HP on low (3.1 amps at 115V). If he actually needs 1/2 HP, he has to run his 2-speed pump on high. So he burns 10.3 amps compared to setting the Energy Saving Pump's dial to 79% or 1/2 HP, which uses 4.5 amps, for a 56% savings.
Let's say a consumer actually needs 0.7 HP instead of 0.75; they would turn the Energy Saving Pump's dial to 89% and draw only 6.3 amps at 115 volts instead of 8.8 amps, for a 28% savings. Or say they only need 0.6 HP, then they would turn the Energy Saving Pump's dial to 84%, and only use 5.3 amps instead of the 3/4 HP draw of 8.8 amps, for a 40% savings. In other words, they don't have to burn the wasted amps because pumps only come in relatively large HP separations. Now they can go in between the available horsepower's.
They can adjust the power usage while watching the water flow in order to precisely select the minimum power usage possible. This is much better than if they don't really know what HP they need, so they go larger rather than smaller, and again waste electricity.
Model numbers include MSP1, MSP3, MSP5, MSP10.
To calculate your operating costs per year multiply the number of amps your motor uses per hour, by the voltage, by the number of hours you run it per year (if you run it 24/7 then use 8,760 hours per year), then divide by 1,000 to convert it to kilowatts, then multiply by your cost per kilowatt-hour.
Amps x 115 volts x 8,760/1,000 x $/kilowatt-hr = $ operating costs per year
Shown below is a table for the operating costs savings per year:
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