Maximum One-Way Distance And Wire Size; Table 4-3 Recommended Circuit Breakers For The Xw Solar Charge Controller; Table 4-4 One-Way Wire Distance And Wire Size For A 24 Vdc System - Xantrex XW4024-120/240-60 Installation Manual

XW Solar Charge Controller Installation

Maximum One-way Distance and Wire Size

Table 4-4 One-Way Wire Distance and Wire Size for a 24 Vdc System

Maximum one-way wire distance for a < 3% voltage drop assuming 60 Adc charging current
Distance in feet (meters)
Amps 12 AWG
10
17.6 (5.36) 28.0 (8.54)
12 14.6 (4.46) 23.2 (7.08)
14 12.6 (3.84) 20.0 (6.10)
16 11.0 (3.36) 17.4 (5.30)
18 9.8 (2.98) 17.6 (4.76)
20 8.8 (2.68) 14.0 (4.26)
25 11.2 (3.42)
30 9.4 (2.86)
35
40
45
50
60
a.These wire sizes are not approved by UL to be installed in the controller, but may be used external to the controller (using a splicer block) to reduce
voltage drop and improve performance.
4–12

Table 4-3 Recommended Circuit Breakers for the XW Solar Charge Controller

Xantrex Part Number Description
865-1065 Qty 6, Breaker 250A, 160 Vdc, Stud Terminal, Panel Mount, UL/CSA
865-1070 Qty 12, Breaker 80A, 125 Vdc, Panel Mount, UL/CSA
865-1075 Qty 48, Breaker 60A, 160 Vdc, Panel Mount, UL/CSA
Important:
Local and national electrical codes must be followed for determining additional
installation requirements.
Larger wire sizes may be used to improve performance, but may not be installed directly into this
Charge Controller. Use a splicer block as previously described.
Refer to Table 4-4 or Table 4-5 and find the maximum current in the left column, and the
one-way distance from the PV array to the XW SCC (or the distance from the XW SCC to
the battery) on the same line, then read the wire size required at the top of the column.
For equivalent metric wire sizes, consult a local electrician or certified installer.
For 24 Vdc systems
10 AWG 8 AWG 6 AWG
44.4 (13.54) 70.6 (21.52)
37.0 (11.28) 58.8 (17.92)
31.8 (9.70) 50.4 (15.36)
27.8 (8.48) 44.2 (13.48)
24.8 (7.56) 39.2 (11.94)
22.2 (6.76) 35.2 (10.72)
17.8 (5.42) 28.2 (8.60)
14.8 (4.52) 23.6 (7.20)
12.8 (3.90) 20.2 (6.16)
11.2 (3.42) 17.6 (5.36)
15.6 (4.76)
14.2 (4.32)
12.6 (3.84)
This manual for use by qualified personnel only
a
Distance in feet (meters)
4 AWG 3 AWG
112.2 (34.2) 141.8 (43.22) 179.2 (54.62)
93.4 (18.46) 118.2 (36.02) 149.2 (45.48)
80.2 (24.44) 101.2 (30.84) 128.0 (39.02)
70.0 (21.34) 88.6 (27.0) 112.0 (34.14)
62.4 (19.02) 78.8 (24.02) 99.6 (30.36)
56.0 (17.06) 70.8 (21.58) 89.6 (27.32)
44.8 (13.66) 56.6 (17.26) 71.6 (21.82)
37.4 (11.4) 47.2 (14.38) 59.8 (18.22)
32.0 (9.76) 40.4 (12.32) 51.2 (15.6)
28.0 (8.54) 35.4 (10.78) 44.8 (13.66)
25.0 (7.62) 31.4 (9.58) 39.8 (12.14)
22.4 (6.82) 28.4 (8.66) 35.8 (10.92)
18.6 (5.66) 23.6 (7.20) 29.8 (9.08)
2 AWG 1 AWG 1/0 AWG
225.0 (68.58) 283.4 (86.38)
187.4 (57.12) 236.2 (72.00)
160.8 (49.02) 202.4 (61.70)
140.6 (42.86) 177.2 (54.02)
125.0 (38.10) 157.4 (47.98)
112.4 (34.26) 141.8 (43.20)
90.0 (27.44) 113.4 (34.56)
75.0 (22.86) 94.4 (28.78)
64.2 (19.56) 81.0 (24.68)
56.2 (17.12) 70.8 (24.58)
50.0 (15.24) 63.0 (19.20)
45.0 (13.72) 56.6 (17.26)
37.4 (11.4) 47.2 (14.38)
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