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  1. #1
    mas985's Avatar
    mas985 is offline Lifetime Member Whizbang Spinner mas985 3 stars mas985 3 stars mas985 3 stars
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    Default Re: Electrical costs for my pool

    With a simple amp meter, you are neglecting the power factor. This is caused by amps getting out of phase with the voltage. Typically, power factors for motors are about 90% so you can subtract about 10% off of that bill.

    The most accurate way to measure your power is to use the electric meter on the side of your house since that is what the power company uses. Each meter is a bit different but a call to your electric service or web site will show you how to convert to kwh.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Default Re: Electrical costs for my pool

    If you know the amp rating of a particular motor, can you calculate the cost just from that?

    What's the forumula you'd use?

    I have a 12 amp motor, run it 24/7, and looking at my last bill I pay $.083 per KWH.

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    Default Re: Electrical costs for my pool

    Quote Originally Posted by Rangeball
    If you know the amp rating of a particular motor, can you calculate the cost just from that?

    What's the forumula you'd use?

    I have a 12 amp motor, run it 24/7, and looking at my last bill I pay $.083 per KWH.
    KWH is approximately (Amps X Volts divided by 1000) X Hours. At max current, your motor would use 12AX120V=1440W Dividing by 1000 gives 1.44KW X 24Hours= 34.56KWH per day, so at $0.083 per KWH, you are using $2.86 worth of electricity a day, or roughly $86 per month. Double that if that is a 220 motor.

    The plate current is max, and you probably aren't using that. The only way to know how much current you are using is to measure it.

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    Default Re: Electrical costs for my pool

    thanks for 220 then do I add the 2 legs together to get the total amps ?

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    Default Re: Electrical costs for my pool

    Quote Originally Posted by JohnInSoCal
    thanks for 220 then do I add the 2 legs together to get the total amps ?
    No, just one.

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    Default Re: Electrical costs for my pool

    JohnT, you would not have to double the cost for a 220 volt motor, as a 220 volt would use about half the amps. Therefore the cost would be approximately the same regardless of 120 or 220 volt motor.

    Cheers

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    Default Re: Electrical costs for my pool

    Quote Originally Posted by hancop
    JohnT, you would not have to double the cost for a 220 volt motor, as a 220 volt would use about half the amps. Therefore the cost would be approximately the same regardless of 120 or 220 volt motor.

    Cheers
    I was referring to the question that only gave amps and didn't mention whether it was 120 or 220. You are correct, but at a given current, 220 would essentially be double the power.

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    mas985's Avatar
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    Default Re: Electrical costs for my pool

    Quote Originally Posted by JohnT
    KWH is approximately (Amps X Volts divided by 1000) X Hours. At max current, your motor would use 12AX120V=1440W Dividing by 1000 gives 1.44KW X 24Hours= 34.56KWH per day, so at $0.083 per KWH, you are using $2.86 worth of electricity a day, or roughly $86 per month. Double that if that is a 220 motor.

    The plate current is max, and you probably aren't using that. The only way to know how much current you are using is to measure it.
    For the same HP motor operating at 230v, it will use half the amps as 115v so the total power is the same.
    Last edited by mas985; 07-19-2006 at 02:10 PM.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Default Re: Electrical costs for my pool

    Just FYI at 60 GPM on my Intelliflo I run 1445 watts per hr. and it takes approx 11 hours to turn the pool over 1 time per day. If I drop it down to 40 GPM then I use 440 watts. The problem is the Trio Pure needs 55 GPM to work well.
    No Bragging just sharing some options, the big issue is the $1250.00 price tag for the pump.

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    Default Re: Electrical costs for my pool

    Does the intelliflow give you the watts or are you measuring it somehow?

    Thanks,
    Robert
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    22K gallon, IG, gunite, Sunstone Pearl White Pearl plaster, Aqualogic SWCG, Hayward Tristar pool pump, Pentair Whisperflo waterfall pump, Pentair Clean & Clear 320 cartridge filter, Sta-Rite heater.

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