Review on Portable Solar Panels - 60W Foldable Solar Charger for 100-500W Solar Generators | Adjustable Kickstands, DC 18V Output, USB 3.0 & Type-C Ports | Ideal for Camping, Van, RV Trips by Derek Pape

The panel lives up to its midday power and since the USB output is only 18W anyway you will see power draining your phone/power bank/etc. even with much less sun charging than on a clear afternoon. I would recommend that you use this panel with an external DC power supply that supports MPPT (Maximum Power Point Tracking) to get the most out of the surface as you will be plugging in a number of things that plug into the USB outputs , still does not allow max out use a fairly large total package.