Extensive research on small solar systems <5 watts led me to this little inexpensive ($12.99) charger from harbor freight. Sure it is big, but it is also 12V at 1.5 watts and cost less than some 1 watt panels when shipping is included (http://adafruit.com/products/262). it is a 22.25V open circuit but who wants that awkward voltage? 12V is a nice round number so i kept the trickle circuit and stepdown in.
I took apart the car charger part and did my own little edits to it and made it into a nice little solar source.
Step 1: Taking the car port apart
Step 2: Edit the + and - leads and tape it up
Cut them off and solder an extension to them so they leave the charger body
I left the circuit in mine and in the body that way was easiest and it gave me the 12V output instead of a 22.25 open circuit voltage. If you want the higher voltage, take it out and add a diode.
Close it up and wrap it in electrical tape and use it for what you want
Step 3: Close it up
Charging small batteries that are a lower voltage have charged fine for me.
Thanks for reading