I haven't looked in a few years, but for disaster preparedness and use around the house there are much larger "portable" solar arrays. I remember some that could be rolled out like a blanket and other that were multiple rigid panels you could string together. I need to get on the ball and buy something.

Thanks for the math help gents! I figured I was misremembering as someone here helped me with the calculations before!

Harbor Freight has a 100w rigid solar array that goes on sale for $149 ($189 normal) which is a really good price for that size panel. Overkill for charging a few small items, too big for travel except in an RV. Good for home emergency use charging a bigger battery.

https://www.harborfreight.com/...Sale+Rank%2Cf&q=100w

A review for Goal Zero's Boulder 200 recommended buying a Renogy solar panel instead.

http://www.goalzero.com/p/502/...riefcase#tab_reviews

A quick look at Amazon shows a number of Renogy products with good ratings. Has anyone here used a product made by them?