Xantrex Technology XW POWER SYSTEM XW4024-120/240-60 - Manual (Page 84)

XW Solar Charge Controller Installation
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Grounding
The XW Solar Charge Controller is designed to work only with negative-grounded
electrical systems. Grounding for both PV and battery circuits is provided inside the
wiring compartment. Each ground connection can accommodate up to #6 AWG wire size.
A fuse rated at 1 A, 600 V (accessible from inside the wiring compartment) grounds the
negative conductor of the PV array and provides PV ground-fault protection (PV-GFP).
Replace with Littelfuse KLKD 1 or equivalent.
Important: Only one Charge Controller is to have the PV-GFP fuse installed in
installations with multiple parallel XW Series. Before mounting and connecting the XW
Seriess, remove the PV-GFP fuse from each unit except one.
WARNING: Shock Hazard
Do not connect the battery negative to ground. NEC requirements specify that the battery
negative ground must be done only through the 1A PV-GFP fuse. Bonding the battery
negative to ground disables PV ground-fault protection. The battery compartment must
only be grounded if it is metal.
Figure 4-6 XW Solar Charge Controller Safety Ground Connector
WARNING: Shock Hazard
Disconnect PV and battery circuits before removing the grounding connection or before removing
or installing the PV-GFP fuse.
xantrex
Solar Charge Controller
Chassis ground terminals.
The PVGFP fuse is located under the power
connector circuit board
This symbol identifies the
protective conductor
(grounding) connection.
WARNING: Fire Hazard
Ensure there is no other ground connection in the DC
wiring or the PVGFP will be defeated and will not protect
the array from ground fault conditions.