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'[OT]: How to solder PV cells on glass?'
2002\10\19@171118 by j

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Does anyone know how to solder (or otherwise attach) wires to the
backs of solar cells mounted on glass? I have tried a few things and
can't make it work.  Either it doesn't seem to get hot enough or the glass
breaks.

How do they solder these in the factory?

Jay

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2002\10\19@180508 by Peter L. Peres

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On Sat, 19 Oct 2002, Jay Hanson wrote:

*>Does anyone know how to solder (or otherwise attach) wires to the
*>backs of solar cells mounted on glass? I have tried a few things and
*>can't make it work.  Either it doesn't seem to get hot enough or the glass
*>breaks.
*>
*>How do they solder these in the factory?

Depends on the plating. If it is silver you need to use silver solder.
Conductive paint is a good bet for low power. There is special conductive
epoxy for industrial use that works with high current too.

To solder them safely, you need to preheat them to 150C (I assume usual
cells, with no plastic coatings etc) then use a low power iron and silver
based solder.

If it's aluminium you won't be able to solder them, use the conductive
paint/epoxy instead. Aluminium solder+flux is not safe on glass/thin Al
afaik.

Peter

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2002\10\19@191212 by j

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Thanks for the help guys!

I am signing off,
Jay

-----Original Message-----
From: pic microcontroller discussion list
[spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU]On Behalf Of Peter L. Peres
Sent: Saturday, October 19, 2002 12:02 PM
To: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
Subject: Re: [OT]: How to solder PV cells on glass?


On Sat, 19 Oct 2002, Jay Hanson wrote:

*>Does anyone know how to solder (or otherwise attach) wires to the
*>backs of solar cells mounted on glass? I have tried a few things and
*>can't make it work.  Either it doesn't seem to get hot enough or the glass
*>breaks.
*>
*>How do they solder these in the factory?

Depends on the plating. If it is silver you need to use silver solder.
Conductive paint is a good bet for low power. There is special conductive
epoxy for industrial use that works with high current too.

To solder them safely, you need to preheat them to 150C (I assume usual
cells, with no plastic coatings etc) then use a low power iron and silver
based solder.

If it's aluminium you won't be able to solder them, use the conductive
paint/epoxy instead. Aluminium solder+flux is not safe on glass/thin Al
afaik.

Peter

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2002\10\19@200659 by William Chops Westfield

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   Does anyone know how to solder (or otherwise attach) wires to the
   backs of solar cells mounted on glass? I have tried a few things
   and can't make it work.  Either it doesn't seem to get hot enough
   or the glass breaks.

I had some promising results with those "broken" silicon solar cells you
can get, by using a mixture of elmers glue and powdered graphite
(lubricant) to GLUE fine wires to the appropriate contacts.  Not good for a
lot of current, of course, but generally you're not getting a lot of
current from a solar cell anyway :-)

BillW

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