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Thread: 2 speed vs. variable speed pump

  1. Back To Top    #1

    Join Date
    Mar 2012
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    Cooper City, FL
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    2 speed vs. variable speed pump

    Hi,

    I am looking to replace my single speed pump with either a 2 speed pump or a variable speed pump to reduce energy costs. Is the extra cost of the variable speed worth it?

    How much will I save with either of these options vs my current pump?

    Currently I run my 1 hp single speed hayward max flo for 8 hours a day.

    Thanks,
    10080 gallons 28x12 rectangular pool. 1HP Hayward Maxiflo pump. 75 sqft Hayward Cartridge Filter. SWG Hayward Aquarite. iRobot Verro 300 Pool Cleaner. Plaster color Pewter.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
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    Re: 2 speed vs. variable speed pump

    What is the cost of your power per kW? A 2-speed will get you most of the savings, but if you power is very expensive, then a VS pump could save enough more on power to offset the added cost. It does not look like you have a need for a bunch of speeds and would be using the low speed almost all the time.

    Another thing to note is that the electronics in VS pump are more susceptible to damage from nearby lightning strikes.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  3. Back To Top    #3

    Join Date
    Mar 2012
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    Cooper City, FL
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    Re: 2 speed vs. variable speed pump

    My cost per KW is 11 cents. How can I calculate how much I am spending per day today and estimate how much will I spend with the 2 speed pump? I just want to understand the monthly savings so I can calculate the payback period.

    Thanks
    10080 gallons 28x12 rectangular pool. 1HP Hayward Maxiflo pump. 75 sqft Hayward Cartridge Filter. SWG Hayward Aquarite. iRobot Verro 300 Pool Cleaner. Plaster color Pewter.

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    Hope Mills, NC
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    556

    Re: 2 speed vs. variable speed pump

    A 1 HP motor requires 746 watts to run, but that assumes 100% efficiency, a 1.5 factor gets you just over 1100 watts.
    16 x 32 17500 gallons
    Vinyl in-ground
    Hayward 250# Sand Filter
    1 HP Pump
    Hayward SWG

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
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    Tucson, AZ
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    37,389

    Re: 2 speed vs. variable speed pump

    Your power cost is too low for a VS to make financial sense; go with a 2 speed.

    Mas985 has spreadsheets in his signature to estimate costs. Basically, running on low speed will move 1/2 the water using 1/4 the power. So even if you double the run time on low, not usually required, you would save 50% the running cost.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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