Hi, I have no experience with photovoltaic chargers but this one (Solio) caught my attention.
I have discovered it in the National Geographic Adventure magazine -
http://www.nationalgeographic.com/adventure/best-of-adventure-2008/gear/desert.html ,
http://www.nationalgeographic.com/adventure/gear/travel/digital-camera-2.html .
According to the Solio website it should be quite durable and reliable (
http://www.solio.com/charger/index.htm ). But like I said I am just guessing. I havenīt used it.
Other photovoltaic chargers/portable power from my browser bookmarks:
http://www.silva.se/templates/Products____95.aspx?epslanguage=ENhttp://www.brunton.com/catalog.php?cat=8