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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