Solar-->AA Rechargable Batteries-->USB

I am trying to design an extremely simple circuit that uses a solar panel to Charge AA batteries, which then power's electronics over USB.

Here are the materials I have so far.

Solar Panel: 6V 830mA (Actual max seems ~7V) Amazon.com: New 6V,830mA Portable Travelling Solar Charger for Cell Phone w/ USB charging cable,GPS,DC,MP3/4: Home Improvement

Zener Diodes: 12V 1N4742A 12V Zener Diode - RadioShack.com

5V Regulator: +5V Fixed-Voltage Regulator 7805 - RadioShack.com

I also have:
7AA Batteries each ~1.85V-1V Rated 2500mA each
AA battery holder
Small breadboard
Project box
Simple sliding switch

Notes: USB is 500mA-1A at 5V.

Solar Panel-->Zener>--AA-->5V Regulator>-->Zener>--USB

Is this circuit possible with the above materials, even if the materials above are not ideal?

It is possible, but you're going to need a fairly large solar aray to charge those big AA batteries. What I don't understand is why do you have a 5V regulator, and then a zener diode?