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    solarpowerquest's Avatar
    solarpowerquest Posts: 3, Reputation: 1
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    #1

    Nov 26, 2013, 12:56 PM
    Electrical question? (Solar panel powering a electric pump)
    I have an electrical question.

    I have 3 large containers filled with vegetable oil that I need to drain when they get filled. I wanted to set up a solar system so this could be done first by manually flipping a switch and then rig up some kind of float switch later, but I ran into problems. I think I know the issue but I want to ask a professional to make sure I am correct before I sink more money into this.

    right now I have a solar panel with the following specs.
    - (Pmax) = 30W Rated maximum power
    - Output Tolerance = +/- 1
    - (Vmp) = 18.2V Voltage at pump
    - (Imp) = 1.65A Current at pump
    - (Voc) = 22V Open-Circuit current
    - (Isc) = 1.82A Short-Circuit Current
    - Maximum system voltage = 1000V
    - Maximum Series Fuse Rating: 15.0A


    Devices are 3 pumps all the same that have the following specs.
    - Voltage = 12 V
    - Current (Amps) =1.9A
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #2

    Nov 26, 2013, 01:49 PM
    The pumps are 12VDC? From what I can see, the pumps are too large for the panel. They do not generate that much current, particularly if you are trying to run 3 pumps. Why not use the panels to charge a battery and then use the battery for the source.
    solarpowerquest's Avatar
    solarpowerquest Posts: 3, Reputation: 1
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    #3

    Nov 26, 2013, 01:52 PM
    Do you think that this panel would be able to run one of these pumps instead of all three at once?
    solarpowerquest's Avatar
    solarpowerquest Posts: 3, Reputation: 1
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    #4

    Nov 26, 2013, 01:53 PM
    Quote Originally Posted by ma0641 View Post
    The pumps are 12VDC? From what I can see, the pumps are too large for the panel. They do not generate that much current, particularly if you are trying to run 3 pumps. Why not use the panels to charge a battery and then use the battery for the source.
    Do you think this panel would be able to run just one of these pumps instead of all three?
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #5

    Nov 26, 2013, 03:07 PM
    Vmp) = 18.2V Voltage at pump
    - (Imp) = 1.65A Current at pump
    - (Voc) = 22V Open-Circuit current
    - (Isc) = 1.82A Short-Circuit Current
    Your pump, according to your notations is 1.9 Amps and that is running amp not startup.
    Why not a battery, would be more than adequate.

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