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Wiring
975-0239-01-01
4–13
This manual for use by qualified personnel only
Connecting the XW Solar Charge Controller to the Distribution Panel
To connect the XW Solar Charge Controller:
1. Ensure the PV array disconnect and battery disconnect are turned off.
2. Ground the XW SCC. Connect a grounding conductor between an XW SCC ground
lug and the power distribution panel ground bus. See Figure 4-9.
3.
Connect the PV array negative (–) output to the XW SCC terminal marked
PV
–.
Table 4-5
One-Way Wire Distance and Wire Size for a 48 Vdc System
Maximum one-way wire distance for a < 3% voltage drop assuming 60 Adc charging current
For 48 Vdc systems
Distance in feet (meters)
Distance in feet (meters)
a
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.
Amps
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
3 AWG
2 AWG
1 AWG
1/0 AWG
10
70.4 (21.44)
112.0 (34.16)
177.6 (54.16)
282.4 (86.80)
448.8 (136.8)
567.2 (172.88)
716.8 (218.48)
900.0 (274.32)
1133.6 (345.52)
12
58.4 (17.84)
92.8 (28.32)
148.0 (45.12)
235.2 (71.68)
373.6 (113.84)
472.8 (144.08)
596.8 (181.92)
749.6 (228.48)
944.8 (288.00)
14
50.4 (15.36)
80.0 (24.40)
127.2 (38.8)
201.6 (61.44)
320.8 (97.76)
404.8 (123.36)
512.0 (156.08)
643.2 (196.08)
809.6 (246.80)
16
44.0 (13.44)
69.6 (21.20)
111.2 (33.92)
176.8 (53.92)
280.0 (85.36)
354.4 (108.00)
448.0 (136.56)
562.4 (171.44)
708.8 (216.08)
18
39.2 (11.92)
70.4 (19.04)
99.2 (30.24)
156.8 (47.76)
249.6 (76.08)
315.2 (96.08)
398.4 (121.44)
500.0 (152.40)
629.6 (191.92)
20
35.2 (10.72)
56.0 (17.04)
88.8 (27.04)
140.8 (42.88)
224.0 (68.24)
283.2 (86.32)
358.4 (109.28)
449.6 (137.04)
567.2 (172.80)
25
44.8 (13.68)
71.2 (21.68)
112.8 (34.40)
179.2 (54.64)
226.4 (69.04)
286.4 (87.28)
360.0 (109.76)
453.6 (138.24)
30
37.6 (11.44)
59.2 (18.08)
94.4 (28.80)
149.6 (45.60)
188.8 (57.52)
239.2 (72.88)
300.0 (91.44)
377.6 (115.12)
35
51.2 (15.60)
80.8 (26.64)
128.0 (39.04)
161.6 (49.28)
204.8 (62.40)
256.8 (78.24)
324.0 (98.72)
40
44.8 (13.68)
70.4 (21.44)
112.0 (34.16)
141.6 (43.12)
179.2 (54.64)
224.8 (68.48)
283.2 (86.32)
45
62.4 (19.04)
100.0 (30.48)
125.6 (38.32)
159.2 (48.56)
200.0 (60.96)
252.0 (76.80)
50
56.8 (17.28)
89.6 (27.28)
113.6 (34.64)
143.2 (43.68)
180.0 (54.88)
226.4 (69.04)
60
50.4 (15.36)
74.4 (22.64)
94.4 (28.80)
119.2 (36.32)
149.6 (45.60)
188.8 (57.52)
WARNING: Shock Hazard
Whenever a PV array is exposed to light, a shock hazard exists at the output wires or exposed
terminals. To reduce the risk of shock during installation, cover the array with an opaque (dark)
material before making the connections.
WARNING: Shock Hazard
Do not connect the battery negative to ground. Bonding the battery negative to ground disables PV
ground-fault protection. For more information, see “Grounding” on page 4–8. See Figure 4-9 on
page 4–15 for correct routing of the battery negative.
CAUTION: Equipment damage
Do not connect the PV negative and battery negative terminals together anywhere in the system,
including the XW Power Distribution Panel or other DC disconnect. The PV negative and battery
negative must be connected to separate terminals as marked on the unit.
Summary of Contents for XW4024-120/240-60, XW4548-120/240-60,...
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Page 3: ...XW Power System Installation Guide...
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