like hikermor ...I have the Goal Zero 7w panel and a Guide 10 battery pack (get the newer Guide 10 plus pack if you need to charge an i-phone)... I have a tendency to buy gizmos just to see how well they work, and it, along with a Fujicell SCH808F controller charger (12V and 120V options), a Motorola 800mA AC to USB charger, and a 12v female to battery clip power tap form the basis for my attempt to standardize my hurricane equipment to rechargeable AA Sanyo Eneloops

the GZ panel provides power out via 12v female tubular, 6v plug (they refer to as solar), and USB port..

the Guide 10 pack accepts the 6v solar, and USBmini in...it outputs via USB... since it accepts USBmini in, it also works with the Motorola 800mA (should have picked a 1A) to charge from a wall port if necessary, as well as my 12v auto chargers for my older flip phone and Garman nuvi... in the Keys this Summer I got one full charge for my phone from the Guide 10 pack...I was a little disappointed at only one charge, but that was within company specifications

with an additional USB to USBmini cable, it gives me a series of options