I'm going to do a two-months shooting in Africa, from Ethiopia to Senegal, and I can't expect to find electricity all the way. Any suggestions on a solar charger for XHA1's batteries, and maybe compatible with a macbook pro?

this "may" take care of both.
http://store.sundancesolar.com/sochforcawiv.html

look around on the site

Thank you very much, really useful suggestion. I think that the macbook pro need more power, but for the Canon batteries it's perfect.

The math works out on this one...

http://www.bhphotovideo.com/c/product/469418-REG/Global_Solar_Energy_35125_SUNLINQ_Portable_Solar_Panel.html