Inspired by a recent article in the New York Times - African Huts far from the grid glow with renewable lights - to find small scale options for DIY solar energy at home I went looking on Ebay for the 'chinese made solar panels for $80' as mentioned in the article and came across a company called Evergreen World, who were selling what essentially amount to 'seconds' solar panel packs.
At the very bottom of the page were a couple of helpful links:
Great Educational Links about Solar Energy from REUK
Measuring Solar Panel Power
How do Solar Panels Work
Real Simple, Real Quick USB parallel vs series + wiring 5v regulators with female usb