[Disaster]

When using CarPlay, any harm to iPhone having it charging by USB and laying it on wireless charging pad (2 sources of charge at same time)?

 

[Homer]

When using CarPlay, any harm to iPhone having it charging by USB and laying it on wireless charging pad (2 sources of charge at same time)?

The iPhone will not charge wirelessly when connected to USB. No harm will be done. Having the phone laying on the wireless charger and plugged in for CarPlay will, in most cases, be the norm for those Passports equipped with a wireless charger.

See the last bullet point at the following link:

https://support.apple.com/en-us/HT208078