Tesla MODEL X Owner's Manual page 23

Model X will charge your phone only when the vehicle is
powered on (the touchscreen is on and you are in the
vehicle). Your phone will not charge after exiting the
vehicle. Model X will also not charge if the vehicle's
Battery is discharged.
NOTE: Ensure your phone supports inductive charging.
NOTE: The wireless phone charger may not work if your
phone case is too large or is made of metal. Try
removing the phone from its case before placing in the
charger.
12V Power Socket
Your Model X has a power socket located on the front of
the center console. An additional 12V power socket is
located in the rear trunk. Power is available whenever
the instrument panel and touchscreen are on.
The 12V power sockets are suitable for accessories
requiring up to 11A continuous draw (15A peak) or a
maximum of 150 continuous watts (180 watts peak).
Opening and Closing
Interior Storage and Electronics
NOTE: Power is available whenever the vehicle is
considered "awake" The vehicle may be awake for many
reasons. For example, when using features such as
Summon, or when features such as Preconditioning,
Cabin Overheat Protection, Keep Climate On, Dog Mode,
Camp Mode, Sentry Mode, etc. are enabled. The vehicle
is also awake whenever the 12V battery is being charged
or is in use, during HV charging, when the vehicle is
communicating with the mobile app, etc. Leaving an
accessory plugged in does not deplete the 12V battery.
NOTE: In situations where Model X is unable to detect
the key (low battery, interference, etc.), place it
immediately below the 12V power socket in the center
console where Model X can best detect it.
WARNING: The power socket and an accessory's
connector can become hot.
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