Bear in mind, that in bright sunlight - your screen will be at MAX, and the processor will be working hard too. If high ambient temp is added - even a heavy-duty usb charger will struggle to keep up with the consumption. And - the phone will be cooking.
A wireless charger - I cannot see, being able to keep up in normal temps - to be honest.
A wireless charger - I cannot see, being able to keep up in normal temps - to be honest.