Surge Protection - Outback Power Systems MX60 Installation And User Manual

In terms of NEC compliance and the 60-amp output rating on the MX60, the largest PV array that can be connected to
the MX60 should have a rated short-circuit current of 48 amps. This will meet NEC requirements and allow the MX60
to perform maximum power-point tracking functions. The following charts show maximum distance in feet of various
guage two conductor copper wire from the PV array to the MX60 MPPT PV charge controller with a 2% maximum volt-
age drop. Temperature and conduit fill corrections may be required.
12 Volt PV Array
Distance in Feet (Two Wires)
2% Voltage Drop
12 Volt Battery
24 Volt PV Array
Distance in Feet (Two Wires)
2% Voltage Drop
12 or 24 Volt Battery System
48 Volt PV Array
Distance in Feet (Two Wires)
2% Voltage Drop
12, 24 or 48 Volt Battery
System
60 Volt PV Array
Distance in Feet (Two Wires)
2% Voltage Drop
12, 24 or 48 Volt Battery
System
Since PV Arrays are usually mounted on a roof or other elevated structure, protection from lightning induced power
surges and other transient power disturbances between the PV array and the MX60 charge controller using a surge pro-
tection device on the input side of the MX60 is highly recommended. If the connection from the MX60 to the battery
string is over 15 feet or if it is routed adjacent to other wiring or sources of power, surge protection on the batteryt side of
the MX60 is also recommended.
Surge protection on both the input and output of the MX60 is required for extended warranty protection.
Amps #8 #6
8
22 35
10
18 28
15
12 19
20
9 14
30
6 9.
40
4 7
50
3 5
60
3 4
Amps #8 #6
8
45 71
10
36 57
15
24 38
20
18 29
30
12 19
40
9 14
50
7 11
60
6 9
Amps #8 #6
8
90 142
10
72 114
15
48 76
20
36 58
30
24 38
40
18 28
50
14 22
60
12 19
Amps #8 #6
8
112 177
10
90 142
15
60 95
20
45 72
30
30 47
40
22.5 35
50
17.5 27
60
15 23

Surge Protection

#4 #2 #1/0
57 90 145
45 72 115
30 48 76
22 36 57
15 24 38
11 18 29
9 14 23
7 12 19
#4 #2 #1/0
114 180 290
91 145 230
60 96 153
45 72 115
30 48 77
23 36 58
18 29 46
15 24 38
#4 #2 #1/0
228 360 580
182 290 460
120 192 306
90 144 230
60 96 154
46 72 116
36 58 92
30 48 77
#4 #2 #1/0
285 450 725
227 362 575
150 240 382
112. 180 287
75 120 192
57 90 145
45 72 115
37 60 96
#2/0 #4/0
180 290
145 230
96 150
72 116
48 77
36 56
29 46
24 38.
#2/0 #4/0
360 580
290 460
192 300
145 232
97 154
72 112
58 86
48 77
#2/0 #4/0
720 1160
580 920
384 600
290 464
194 308
144 224
116 172
97 154
#2/0 #4/0
900 1450
725 1150
480 750
362 580
230 385
180 280
145 215
121 192
5