Maximum watt charger for iPad Pro 2022

Some explanation may be helpful…

A compatible high-power USB Power Adapter is completely safe to use with your iPad; providing that the Power Adapter itself is healthy, it will not cause any issues whatsoever. That said, if a fault were to occur, the Power Adapter has the capacity to cause considerable damage to low-power electronics.

Apple’s current range of Power Adapter’s, including those intended for Mac computers, support USB PD (Power Delivery). USB PD is an active protocol; the source (Power Adapter) and sink/load (in this case, your iPad) “negotiate” and agree a common Power Profile that will determine the charging voltage that will be applied. 

For non-PD compliant devices - or compliant devices that fail to negotiate a mutually supported Power Profile - the Power Adapter will only supply the standard USB 5V at a reduced current. This mechanism ensures that the higher charging voltages not supported by non-PD devices are not damaged by an over-voltage condition.

You should note that while your iPad Pro can be charged with a compatible USB-C Power Adapter, it will not charge any faster than when using the USB-C 20W Power Adapter that was likely supplied with your iPad.

When charged with a Power Adapter that supports USB PD, the maximum iPad charging rate is limited to ~20W. When using a standard USB Power Adapter, operating at 5V, the maximum charging rate is limited to 12W (i.e., 2.4A @5V).

sure, you could use a 600watt too if you wanted to