Well I finally got around to wiring together some of these solar cells I got on eBay back in August. First up is the .5v 1750mA silicon cells.
Unfortunately it was late and I wired them up so that it will only be putting out 3v in its current configuration. Ill fix that tomorrow after work. The strings of cells will be connected as shown in red on the image, and the long strips along each side will be removed. That should give me a healthy 18v for charging a 12v battery.
Soldered these together....

Do It Yourself Solar