Tripp Lite AG-879F Series Owner's Manual page 8

Feature Identification
G
Main Ground Screw: Connect to an earth ground or a vehicle
grounding system in order to properly ground the inverter. See
Battery Connection for instructions.
Not Shown:
Audible Alarm: The internal audible alarm activates when either a low
or high DC voltage condition exists.
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12/5/2018 9:13:35 AM