don't know where to start (Solar Panel)

Discussion in 'The Projects Forum' started by tracker, Jun 6, 2012.

  1. tracker

    Thread Starter Member

    Jun 1, 2011
    41
    1
    hello,
    i bought a solar panel for my project, it's just a nice square solar cells 8 Watts and it comes with a Solar Power system controller, brief, i want to use it to feed my circuit board (5V input),or to use it with a rechargeable batterie, and i don't know how to use it, there's no wires nothing at all just the board and the controller wich i have no idea about it's role.
    plz i'm looking forward for the help.
    ps: i didn't want to use a batterie directly, i want to learn about how the panels works, it's should be very easy, but i just don't know yet (^_^).
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    A solar panel is fairly straight forward. It puts out a voltage whose magnitude is dependent on the amount of sunlight falling on it. There should be two wires from the solar panel, red (+ve) and black(-ve). You connect the panel via a diode in series to the battery you wish to charge. The only problem you have to watch out for is overcharging the battery.
     
  3. tracker

    Thread Starter Member

    Jun 1, 2011
    41
    1
    yes you're right and that's the role of the controller, it comes with 6 connectors 2 to the panel,2 to the batterie and 2 optional if you want to power up a bulb or something else. the problem is i don't have the two wires (red and black one)
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    So you have two wires to charge the battery and two wires to power a load.
    So what's the problem?
     
  5. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    need to see clear pictures or diagrams of the controller board.



    And really?? Getting a couple of pieces of colored wire should not be that hard!
     
  6. radiohead

    Active Member

    May 28, 2009
    474
    31
    Here is a good site for you to start at. Click on the Tutorials radio button.
    http://www.freesunpower.com/

    Your solar panel should have two exposed terminals. Set your voltmeter to DC volts and touch the leads to the exposed terminals. Swap them around until you get the correct polarity. If your panel does not have bolt type lugs, and you must solder, be very careful when soldering to a metal tab on tempered glass.
     
    tracker likes this.
  7. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    Does anyone actually "read" these posts???


    His problem is the fact that HE DOES NOT HAVE THE WIRES...... so really what kind of help are we supposed to give him, can't PM him the wires....:cool:
     
  8. wayneh

    Expert

    Sep 9, 2010
    12,152
    3,058
    +1

    I'll just add that the voltage also depends on the load current. Many panels are described (marketed!) using two values; the voltage with no load and the current with no voltage (leads shorted). The most common newb mistake seen here is to multiply open circuit voltage by the short circuit current and dream of the power level. It just doesn't work that way.

    In between these two endpoints, there's an I-V curve showing the voltage at any current draw. Peak power is usually at 80-90% of open voltage, at a far lower current than short-circuit.

    If your panel was sold as an 8W panel with the controller, that's probably a "real" power level at full sun.
     
  9. radiohead

    Active Member

    May 28, 2009
    474
    31
    can you post a photograph of your panels (front and back) so we can determine where you can connect the wires that you can buy at any electronics store?
     
  10. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    What if I "attach" them here.. Maybe that will work :D
     
    BMorse likes this.
  11. tracker

    Thread Starter Member

    Jun 1, 2011
    41
    1
    pal, i figure it out, i just had to solder the exposed terminals with two wires. now it works and it is great indeed
     
  12. tracker

    Thread Starter Member

    Jun 1, 2011
    41
    1
    thank you body, i tough at first that the panels comes with the terminal wires attached, i even didn't notice the exposed terminals in the back of it, :)
     
  13. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    Good for you, pal! Amazing what wires would do when properly attached!:rolleyes:
     
  14. tracker

    Thread Starter Member

    Jun 1, 2011
    41
    1
    ;;;;;;;;:D
     
  15. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    Or you could get a mating connector which would allow you to easily connect and disconnect.
     
    tracker likes this.
Loading...