Renewable Energy Questions/Discussion > Solar (heating or electric)

Why can't I solder a connection on little solar cell?

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Norm:
 A few solar cells from some Garden lights, I salvaged had
everything all set up....each one had a little NiCad (100Ma.)
  So I was going to put 4 in series took all the wires off busted
at the soldered connection.....all but one right in the middle of
the series wire and solder lifted clean off....so when I attempted
to solder where the connection had been no thin little strand to
solder to.....how do they manage to expose and solder to this
silver strand in the first place?
....tried scaping with a razor blade just scraped everything off.....
Norm.

Watt:
What kind of solder did you try? 

Volvo farmer:
You need at least two of the following things..

Young eyes
Enthusiasm
More solar cells

Or one of the following things...

Chinese manufacturing plant

bj:
   I've got some salvaged from the same thing.  They appear to be printed directly on glass.  With the
help of my best close-up glasses, it appears the solder joint is made with some kind of liquid solder.
   Long story short, I just made up a small clamp, out of brass , kind of U shaped, and clamped the wire
on.
   Not sure if that helps, or just confuses the issue, but good luck with it Norm.

Watt:
I'm pretty sure that a flux pen helps.  I'm almost sure I watched a video on SunElec.com website about needing a flux pen made for solar panels or the connection job to a panel would be darn hard.  I also wish you the best norm.

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