Question about Sharp Polycrystalline Solar Panels 123-Watt Solar Panel, 7.16A Max. Amps

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No power out

When connected to pump controller no power
shows 24 volts to meter

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  • Rob Duron
    Rob Duron May 11, 2010

    Do you have 24v when the panel is not connected to the controller?


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When you say no power.I assume you have no current flow,because you state there is a voltage present.I can think of at least two possible routes to figure out what is going on.First you could try another load with your solar panel array,and see if it is producing its rated current at the voltage specified.Say the panel is rated at 24 watts for example.24 watts divided by 24 volts equals 1 amp.If you hook up a 24 ohm load to this array it should produce your 1 amp current flow,or in other words it should be able to maintain the 24 volts across the load at 1 amp.Thus your 24 watt output.Also check that your controller doesn't need more power input than the array can provide.Which is kind of leading to the other route you can take.You can also try placing a 24 volt dc source of sufficient output power across your pump controller and see if it will operate.Two car batteries in series would work.

Posted on Jun 27, 2009

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