Xw Solar Charge Controller Installation; Installing The Charge Controller; Pv Array Requirements; Mppt Voltage Range - Xantrex XW4024-120/240-60 Installation Manual

XW Solar Charge Controller Installation

Installing the Charge Controller

PV Array Requirements

MPPT Voltage Range

4–2
This chapter describes installing the XW Solar Charge Controller (XW SCC) with the
XW Power System, including the power distribution panel. For stand-alone installation,
see the XW Solar Charge Controller Owner's Guide.
:
Note The following information provides only general guidelines. The installation and rated
performance of your PV array is subject to inspection and approval by the authority having
jurisdiction.
Each XW SCC must be connected to its own PV array. Although the XW SCC can harvest
a maximum of 3500 W, the PV array size can be as high as 6720 W (based on
48 A × 140 V = 6720 W).
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CAUTION: Equipment damage
The PV array voltage must never exceed 150 V
array I (short circuit current) must not exceed the 60 A input current rating of the XW SCC at any
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time.
Panels rated up to 48 A at 77
caused by irradiance enhancement under certain conditions (reflection from snow, for
example).
The XW SCC maximum power point tracking algorithm maximizes the output energy of
PV arrays as long as the operating voltage is within the MPPT operational window.
Ensure that the PV array used in the system operates within the MPPT operational
window.
Effects of array voltages outside of the MPPT operational window are shown in
Table 4-1.

Table 4-1 MPPT Operational Window

Voltage
V < V
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(system battery voltage)
V < V
MPP batt
V = V to 120 Vdc
MPP batt
120 Vdc < V < 140 Vdc XW SCC reduces the output current
MPP
V > 140 Vdc
MPP
(or V > 140 Vdc)
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This manual for use by qualified personnel only
(open circuit voltage) under any conditions. The
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F (25 °C) are recommended to allow for increases in I
°
Effect of Array Voltage
XW SCC not operating.
Harvest of solar energy less than
optimal.
Maximum harvest of solar energy.
limit to protect the unit from voltage
spikes.
XW SCC shuts down. Unit may be
damaged if V > 150 V.
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XW Series Mode
Low Light
Charging
Charging (MPPT window)
Input voltage derating
Over-voltage fault
975-0239-01-01