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359
XANTREX FREEDOM XC PRO INVERTER
Basic Installation Procedures
975-0799-01-01 23
Ground Fault Circuit Interrupters (GFCIs)
A GFCI is a device that de-energizes a circuit when a current to
ground exceeds a specified value that is less than that required to
blow the circuit breaker. GFCIs are intended to protect people
from electric shocks and are usually required in wet or damp
locations.
Installations in marine and recreational vehicles require GFCI
protection of branch circuits connected to the AC output of the
Freedom XC PRO.
The Freedom XC PRO GFCI Kit (PN: 808-9817) (sold separately)
option is available to use with the Freedom XC PRO inverter unit.
DC Cabling
This includes all the cables and connectors between the batteries,
the DC disconnect and over-current protection device, and the
Freedom XC PRO. Most mobile installations require multi-strand
insulated cables for flexibility and durability in high vibration
environments and require disconnects and over-current devices.
Electrical wiring sizes in North America are indicated by AWG
notation. In other parts of the world, the metric system is used.
Under the AWG standard, a larger gauge number indicates a
smaller wire diameter. Wire size is usually marked on the larger
sized cables.
Table 6
specifies the minimum recommended DC
cable size and maximum fuse size for the Freedom XC PRO. The
DC cables must be stranded, copper, and must be rated
90 °C minimum. The cables should be terminated with lugs that
fit the DC stud terminals snugly (
5
/
16
" hole size) and properly
torqued according to manufacturer-specified torque setting.
Basic Installation Procedures
24 Freedom XC PRO Owner's Guide
Inverter/charger
Cable Length:
Battery to
Inverter (one
way)
Minimum
Cable
Size
Maximum
battery
Fuse Size
Freedom XC
PRO 2000
Less than 5 feet
(1.5 meters)
No. 2/0
AWG
250 A DC
Freedom XC
PRO 3000
Less than 5 feet
(1.5 meters)
No. 4/0
AWG
350 A DC
NOTE :It is not recommended using a cable longer than 5 feet
(1.5 meters) in each direction. North American cable sizes above
are based on the US National Electrical Code Table 310.17 -
75 °C cables, assuming an ambient temperature of 30 ° C cables.
Table 6 Required Cable Sizes
IMPORTANT : Using the correct cable size is critical to achieving
the rated performance of the Freedom XC PRO unit. When
starting a heavy load the Freedom XC PRO can draw current
surges from the battery of up to 400A. If the DC wiring is too small
the voltage drop from this surge will result in a voltage at the
Freedom XC PRO terminals that is too low for the Freedom XC
PRO to operate correctly. The Freedom XC PRO may appear to
operate correctly with smaller cables until a heavy load such as a
microwave or refrigerator attempts to start - then the unit may
work correctly sometimes and not work correctly other times.
DC Disconnects and Over-Current Devices
The DC circuit from the battery to the Freedom XC PRO must be
equipped with a disconnect and over-current device. This usually
consists of a circuit breaker, a “fused-disconnect”, or a separate
fuse and DC disconnect. Do not confuse AC circuit breakers
with DC circuit breakers. They are not interchangeable. The
rating of the fuse or breaker must be matched to the size of cables
used in accordance with the applicable installation codes. The
breaker or disconnect and fuse should be located as close as
possible to the battery, in the positive cable. Applicable codes
may limit how far the protection can be from the battery.
Batteries
The Freedom XC PRO uses 12-volt battery banks. Every
Freedom XC PRO system is recommended to have a deep-cycle
battery (house) or group of batteries with a total capacity of 100 Ah
or more which provides the DC current that the Freedom XC PRO
converts to AC.