Xantrex Freedom EX 4000 Owner's Manual page 27

Feature
Captive nut panel screw holds the wiring
4
compartment cover in place. See WARNING above.
USB port can only be used for updating the unit's
firmware. c Do not use for powering or charging
5
USB devices.
Remote port allows you to connect the Freedom EX
Remote Panel (PN: 808-0817-03) (sold separately)
6
which is a remote display and control device
accessory.
BTS port can be used for plugging in a battery
7 temperature sensor (BTS (PN: 808-0232-01), sold
separately).
Ventilation grille is to vent out warm air inside the
8
unit
975-0999-01-01
Description
Communications Panel
11