>>785044
I have two of these: https://www.jaycar.com.au/10w-solar-mobile-charger-with-usb-output-with-1m-cable/p/MB3595
They've been good. Notice how there's no glass and pretty-much all plastic, so they've been really robust.
They can do their claimed 10W power output, however a lot of devices recharge with a limited current/power rate-- I have a 'multitailed' cable where I can charge two devices at the same time from the one panel.
Things to recharge are the phone, tablet, and bluetooth audio for the helmet. I've also got an 8Ah 'jump starter' (which does 12V as well as USB) and a 10Ah regular battery pack.
Recharging the camera batteries needed one of these: https://www.jaycar.com.au/universal-li-ion-ni-cd-ni-mh-battery-charger/p/MB3639 .. It needs 12V or mains, but I've made up an adapter cable to connect the jumpstarter to it.
I haven't needed to bother with solar charging while riding (like the panel between the handlebars). I did that on the 2nd trip, but this time I've gotten by without it.