While wea re talking about solar panels I'll once again post the link to
the solar panel source I found
<http://www.laviesolar.com/>
that is cheaper than any other source I've found.  I have one of their 50
watt panels that I use in conjuction with another 50 watt panel with a high
end name on it.  Construction is as good on the panel from Lavie and careful
testing in actual use shows the output identical to the high end (and twice
the price) panel.
BTW, their website doesn't work well with Firefox, use IE to access for ease
of use.