1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Solar Panel Help!

Discussion in 'Alternative Energy' started by chriskid, May 25, 2009.

  1. chriskid

    chriskid New Member

    Joined:
    Mar 30, 2009
    Messages:
    8
    Likes:
    0
    hi, i have recently built a small 18w solar panel and am quite confused. When i try to measure the current of the solar panel in just daylight it produces only 5ma and sometimes i measure it straight afterwards and it would give out 100ma in the same daylight. I was thinking this was due to a connection that might be not quite good enough in the solar panel because it doesnt gradually go from 5ma to 100ma, it just shoots straight up to it when nothing outside as changed in light intensity?

    thanks from chris
     
  2. Willbe

    Willbe New Member

    Joined:
    Aug 16, 2008
    Messages:
    1,236
    Likes:
    7
    Location:
    MD
    Intermittent connection in your panel or your ammeter or both.
     
  3. M_ASIF263

    M_ASIF263 New Member

    Joined:
    May 25, 2009
    Messages:
    1
    Likes:
    0
    hi i want to make soler pannel at my home plese tell me what requirements for that and how i can made it thanks.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. Sceadwian

    Sceadwian Banned

    Joined:
    Oct 27, 2006
    Messages:
    14,047
    Likes:
    141
    Location:
    Rochester, US

    Broken cell?
     
  6. chriskid

    chriskid New Member

    Joined:
    Mar 30, 2009
    Messages:
    8
    Likes:
    0
    I Noticed

    I Noticed that two of the cells in the solar panel have splits/ cracks going to the middle of the cell. Do these cracks have an effect on the solar cell even though its not completely split in half? since this might the reason why it was doing the thing earlier.
     
  7. Sceadwian

    Sceadwian Banned

    Joined:
    Oct 27, 2006
    Messages:
    14,047
    Likes:
    141
    Location:
    Rochester, US
    Yes, it will effect it. Depends on how the solar array is wired internally, it's probably some combination of series/parallel panels, you may not be able to bypass the cracked cell, which means you should probably buy a new panel.
     
  8. chriskid

    chriskid New Member

    Joined:
    Mar 30, 2009
    Messages:
    8
    Likes:
    0
    so with a cracked cell when the cells are parallel is it worth changing the cracked cell for a spare? or is there only minimal change in how well the cell works because of the crack?

    thanks from chris
     
  9. Sceadwian

    Sceadwian Banned

    Joined:
    Oct 27, 2006
    Messages:
    14,047
    Likes:
    141
    Location:
    Rochester, US
    If it's an 18watt solar panel it's a combination of series and parallel cells, you could try using a conductive glue to seal the crack, but I have no idea what that'll do to the long term reliability of the panel. If you have the funds or a replacement you can use I would recommend simply replacing it, and contacting the maker of the panels to see what kind of repair/patch method they might suggest.
     

Share This Page