might be just me, but looks gimmicky
I'd strongly suggest a separate well made pack, and a separate well made solar charging system, depending on your budget.
I can't really recommend a pack as I'm not sure what size you'll need for your adventure and/or what other options you'd like to have.
We discussed solar chargers in
this thread not long ago, maybe there are newer options I am not aware of.
I also have doubts how useful a solar charger will be in a jungle environment but that's really your call.
Will be watching this thread, I really like to read the discussions on packs and solar chargers, lots of knowledgeable peeps here.