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Thread: 1 HP well pump motor

  1. #1
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    Default 1 HP well pump motor

    I would like to setup a solar system to power a 1 HP well pump.

    The pump is single phase 230 vac and draws 8.3 amps at full normal load.

    Question: Can two 12vdc X 110vac be wired in series to feed 220vac to the motor

    Noticed that the 24vdc/220vac or 12vdc/220vac inverters are 50 Hz.

    Will the 220 vac/60 Hz motor run on 220 vac 50 Hz?

  2. #2
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    My advice is to get a licensed electrician to help you. I'm just concerned for your safety, no offence.

  3. #3
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    Quote Originally Posted by raven1 View Post
    I would like to setup a solar system to power a 1 HP well pump.

    The pump is single phase 230 vac and draws 8.3 amps at full normal load.

    Question: Can two 12vdc X 110vac be wired in series to feed 220vac to the motor

    Noticed that the 24vdc/220vac or 12vdc/220vac inverters are 50 Hz.

    Will the 220 vac/60 Hz motor run on 220 vac 50 Hz?
    Quick answer is NO.

    Do not try to wire two single phase 110volt system in series to generate a 220volt system.

    As Green suggested please be safe and go get a licensed electrician to discuss options to run your pump.

  4. #4
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    Default 1 HP well pump motor

    Well is on a farm with no bldgs, only open area.
    Currently using a 220vac generator to power 1 HP well pump with a rubber extension cord.

  5. #5
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    Quote Originally Posted by raven1 View Post
    Well is on a farm with no bldgs, only open area.
    Currently using a 220vac generator to power 1 HP well pump with a rubber extension cord.
    You will need an inverter that is rated about 1500 watts 230vac 60hz output. The problem is unless you have a battery source of some kind you will not get a constant voltage output from a pv solar panel to keep the pump running. You will need a big battery system. The cost of that battery system will be very expensive.

    I would stay with the generator for now. You may be able to swap out your old pump with a new DC version. I believe the sponsor of this website sells Solar water pump systems.

  6. #6
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    From your 1st post it is rather clear you are not in the electric field - buy from a dealer for your own safety.

  7. #7
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    Default 1 HP well pump motor

    Currently have a bank of four deep cycle Trojan T-1275 plus 12v batteries with 120 AH capacity/battery
    used for irrigation purposes using a 24vdc/120ac converter for a transfer pump.

    The 220vac inverters seem to all 50 Hz, the well pump is 220vac 60Hz

    The well pump uses 1900 watts based on running current of 8.3 amps.
    The inverter needs to be a minimum 5700 watt capacity to handle the start up mode.

    I know a 10,000 watt 220 inverter will do the job, but that was not my question.

    Re state the question: Can the putput of two 120 volt inverters be wired in series to produce 220 vac.

    Already know that two 12 vdc inverter cannot be wired in series on input
    side to work off a 24vdc battery bank

  8. #8
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    Quote Originally Posted by raven1 View Post
    Re state the question: Can the putput of two 120 volt inverters be wired in series to produce 220 vac.
    That question was already answered by SunEagle, and the answer is still no. If you need 220 output you buy an inverter that puts out 220. Simple.

  9. #9
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    Quote Originally Posted by green View Post
    That question was already answered by SunEagle, and the answer is still no. If you need 220 output you buy an inverter that puts out 220. Simple.
    If and only if the two inverters are the same model from the same manufacturer and have instructions on how to connect them together to produce 240 volts, you can do it. There has to be coordination between the two inverters so that their output waveforms are synchronized. And if the inverters are MSW there may not be any way to do it at all from a single battery bank.

    Grid tie inverters synchronize themselves off the grid supply and so do not need to coordinate.
    SunnyBoy 3000 US, 18 BP Solar 175B panels.

  10. #10
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    Quote Originally Posted by green View Post
    That question was already answered by SunEagle, and the answer is still no. If you need 220 output you buy an inverter that puts out 220. Simple.
    I was actually trying to sound like Sunking..... not a bad imitation if you ask me

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