30W USB-C ADAPTER performance

Your iPad Pro 11” supports USB-PD Fast Charging - it’s maximum supported charge rate being achieved using the supplied 18W Power Adapter.

The 30W Power Adapter is compatible with your iPad (I use personally use one all the time), but the iPad only charges at it’s maximum 18W rate (i.e., 12V @1.5A). I chose the 30W Power Adapter as I routinely use a Mophie 3XL PowerStation (also USB-PD compliant); the 30W Power Adapter charges both my iPad Pro at its maximum rate (18W) and the PowerStation at a much faster rate.

So, in conclusion, the 30W Power Adapter offers no tangible benefit for your iPad - but may offer flexibility of faster charging for other devices. If you have no need of a higher-rated Power Adapter, then the stock 18W Adapter will be both adequate and cheaper to purchase.

I hope this clarification is helpful in to you - and helps with making an informed decision as to usefulness for your specific needs.

Hi saichand09,

It seems you would like some help with fast charging, and we want to get you the info you need.

You can review the page regarding fast charging here:

Fast charge your iPhone and iPad - Apple Support

Your iPad Pro comes with an 18W fast charger in the box:

iPad Pro 11-inch (1st generation) - Technical Specifications

If you were to get a larger charger, you could see an improvement in charging performance, but it isn't as dramatic a difference compared to the older USB chargers included with iPhone or older models of iPad. Those were normally 5W or 10W respectively.

Good luck.

Thanks for using the Apple Support Communities.

You’re very welcome.