Others with more specific acumen on solar chargers have done a great job of describing its function (which is great) in charging. I'll give a lay person's impressions of the things I like, and what I struggled with.

First: This is fantastic! It comes folded into itself several times in a sturdy canvas enclosure, with a clip closure on two points. The clips were a little non-intuitive for me, and I saw no instructions on how to manage them. After several failed attempts, I studied them closely and saw a mid-point hinge, and decided their must be a way that the top flexes. After some fiddling, one of them opened, but I couldn't duplicate what I had done. But I was able to see the mechanism's innards, so then I could see that you have to depress the top of the clip on the edge closest to the attachment to the lower strap. This releases the clasp. It slides back into places easily.

As for the solar panel: Cowabunga! This is the real deal! It's got a great case and a pretty large footprint, when it's scarcely bigger than a thin briefcase! Very happy with the quality, and the attention to detail in the design. Easy to set up and use! This is going in my truck tool box.