I was looking at a solio but went for something with more capacity instead: solar gorilla by powertraveller, 20v and 5v USB output. About the size of a small notebook.

I'm going to be spending the next 3 years in the least developed region of a very under-developed country (Guinea Bissau) so I needed something that could supply enough power to keep a small project running.

Based on the research I did before ending up with the solar gorilla: you should take a look at the powerfilm stuff, just about mil-spec, like their USB and AA charger: http://store.sundancesolar.com/pousbaasoch.html very small and well-made from what I understand.