I have experience with solar monkey (underpowered for the marketed use and expensive), Goal zero (expensive, but works well) and some small cheaper ones. But the solar power industry has exploded the last few years, so too many new choices these days.


I would say have a look at some comparissons:

https://youtu.be/MgRloFSeWoE
http://www.outdoorgearlab.com/Solar-Charger-Reviews/ratings

(not affiliated, but find them to have nice comparions)