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Solar panel no amperage

Discussion in 'General Electronics Discussion' started by turbogt16v, May 22, 2017.

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  1. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Hy, i bought 4 chinese diy solar panels.
    12v 1.5w.
    I did not conect diode and try to measure current. It gives ovet 12v but no ampetage.
    I connected the multimeter to fused, and get no amps. Do i need to connect it to unfused, i tried bu still no amperage.

    Any suggestions
     
  2. Alec_t

    Alec_t

    2,819
    754
    Jul 7, 2015
    What value load resistor did you use when measuring current?
    Did you have your meter set to a current range?
    Post a sketch of your test setup.
     
  3. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Do i need a resistor, man i just conected multimeter to panels wich had no diode.
     
  4. Alec_t

    Alec_t

    2,819
    754
    Jul 7, 2015
    With no diode and no resistor you may have blown the fuse inside your meter.
    Edit: Did you have the meter probes plugged into the correct sockets of the meter for the 10A current range?
     
  5. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Ok, it stil works, amd its not big amperage, 0.125
     
  6. Alec_t

    Alec_t

    2,819
    754
    Jul 7, 2015
    Well that's about what it should be. 12V x 0.125A = 1.5W.
     
  7. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Man,i know that, from calcilation, i did not get any readings from amperage
     
  8. davenn

    davenn Moderator

    13,580
    1,868
    Sep 5, 2009
    so which is it ?, you just finished saying previously that you got the reading
     
  9. Alec_t

    Alec_t

    2,819
    754
    Jul 7, 2015
    What still works? Is your meter functioning correctly as an Ammeter or is its fuse blown?
    We still don't know what your meter setting and test setup was when you tried measuring current.
    If the panel is producing a voltage then it must be able to drive a current through a resistive load. If you can't measure that current then
    a) the meter's current-measuring function is broken, or
    b) your measuring setup is wrong.
     
    hevans1944 and davenn like this.
  10. Audioguru

    Audioguru

    2,805
    633
    Sep 24, 2016
    The cheap Chinese solar panels on my solar garden lights stopped working because the plastic covers got sunburned. I polished the covers and put a clear UV-resistant coating on them and now they work again.
    Modern cheap Chinese solar panels have a glass cover that lasts forever but they failed to seal them properly so the underneath printed wiring got corroded away.
     
  11. BobK

    BobK

    7,682
    1,685
    Jan 5, 2010
    I vote for a blown fuse in the meter due to all the times I forgot my meter was set to mA and I tried to measure a voltage.

    Bob
     
  12. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Whell. I was my fault, i did not change the probe jack to test amperage,
    By the way, dont buy chinese solar panels
     
  13. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,382
    2,771
    Jan 21, 2010
    If you get 12V and 0.125A as the open circuit voltage and the short circuit current then the panel is probably capable of 12*0.125*0.9*0.8 = 1.1W (because the max power is typically near 90% of the Isc and 80% of Voc)
     
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