Instruction Manual

Installation
2–16 975-0400-01-01 Revision H
This manual is for use by qualified personnel only.
Maximum One-way Distance and Wire Size
Refer to Table 2-3 and find the maximum current in the left column, and the one-
way distance from the PV array to the solar charge controller (or the distance
from the solar charge controller 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.
WARNING
EQUIPMENT DAMAGE
Do not connect an array capable of delivering over 60 A I
sc
to the solar charge
controller. Wire sizes larger than #6 AWG (16 mm
2
) may be used to reduce
resistive losses but should not be installed directly into the solar charge
controller. Use a splicer block or similar to connect wires of different gauges
together. Follow manufacturer’s recommendations for torque and mounting.
Failure to follow these instructions can result in death or serious injury.
Important: Local and national electrical codes must be followed for determining
additional installation requirements.
Table 2 - 3 One-Way Wire Distance and Wire Size
Maximum one-way wire distance for a < 3% voltage drop assuming 60 A charging
current
12 Vdc application shown
For 24 Vdc systems, multiply distance by 2
For 36 Vdc systems, multiply distance by 3
For 48 Vdc systems, multiply distance by 4
For 60 Vdc systems, multiply distance by 5
Distance in feet (meters) Distance in feet (meters)
a
Amp
s
12
AWG
10
AWG
8 AWG6 AWG4 AWG3 AWG2 AWG1 AWG
1/0
AWG
10
8.8 (2.68) 14 (4.27) 22.2 (6.77) 35.3 (10.76)
56.1 (17.10) 70.9 (21.61) 89.6 (27.31) 112.5
(34.29)
141.7
(43.19)
12
7.3 (2.23) 11.6 (3.54) 18.5 (5.64) 29.4 (8.96) 46.7 (14.23) 59.1 (18.01) 74.6 (22.74) 93.7 (28.56) 118.1
(36.00)
14
6.3 (1.92) 10 (3.05) 15.9 (4.85) 25.2 (7.68) 40.1 (12.22) 50.6 (15.42) 64.0 (19.51) 80.4 (24.51) 101.2
(30.85)
16
5.5 (1.68) 8.7 (2.65) 13.9 (4.24) 22.1 (6.74) 35.0 (10.67) 44.3 (13.50) 56.0 (17.07) 70.3 (21.43) 88.6 (27.01)
18
4.9 (1.49) 8.8 (2.38) 12.4 (3.78) 19.6 (5.97)
31.2 (9.51) 39.4 (12.01) 49.8 (15.18) 62.5 (19.05) 78.7 (23.99)
20
4.4 (1.34) 7 (2.13) 11.1 (3.38) 17.6 (5.36)
28.0 (8.53) 35.4 (10.79) 44.8 (13.66) 56.2 (17.13) 70.9 (21.6)
25
5.6 (1.71) 8.9 (2.71) 14.1 (4.30)
22.4 (6.83) 28.3 (8.63) 35.8 (10.91) 45.0 (13.72) 56.7 (17.28)
30
4.7 (1.43) 7.4 (2.26) 11.8 (3.60)
18.7 (5.70) 23.6 (7.19) 29.9 (9.11) 37.5 (11.43) 47.2 (14.39)
35
6.4 (1.95) 10.1 (3.08)
16.0 (4.88) 20.2 (6.16) 25.6 (7.80) 32.1 9.78) 40.5 (12.34)
40
5.6 (1.71) 8.8 (2.68)
14.0 (4.27) 17.7 (5.39) 22.4 (6.83) 28.1 (8.56) 35.4 (10.79)
45
7.8 (2.38)
12.5 (3.81) 15.7 (4.79) 19.9 (6.07) 25.0 (7.62) 31.5 (9.60)