Update 7/23/2013 :
View the video for an explanation of how the charging station works. Since the video was made, new, more powerful solar panels have been installed. On a sunny day the output is close to 30 Amps coming out of the panels and somewhere in the low 20’s where we plug in our chargers. We expect that it will now be able to handle charging the larger lithium polymer batteries.
Below is the new solar charge controller. The readout alternates between battery volts, solar amps, and load amps.