Does IPad Pro 12.9 1st generation support 30W fast charge?

Hello and welcome to Apple Support Communities Hang9650,

We see that you have a question about fast charging for the iPad Pro. We'd be happy to provide you with some information to help answer your questions.

The article below provides information on fast charging devices.

Fast charge your iPhone and iPad

Thank you for using Apple Support Communities.

Yes, your iPad Pro supports USB-PD Fast Charging.

Fast charge your iPhone and iPad – Apple Support

Your iPad will charge at its fastest supported rate when using an 18W USB-PD Power Adapter. You can use a higher wattage Power Adapter without issue, however, the iPad will not benefit from the increased power.