The pocket on this 16W charger is good to keep the USB ports covered when not in use and you might be able to store an additional 3” USB cable, but it would be too tight to store a power bank. The BigBlue 28W has a zippered compartment and a strap for holding a cell phone. Like you indicate though, in direct sun (where the panel should be) it’s going to heat up so probably not as useful as it appears.