Outback MX60 - Surge Protection

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 1.5% maximum volt-
age drop. Temperature and conduit fill corrections may be required.
WIRE GUAGE
SURGE PROTECTION
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 battery 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 #4 #2 #1/0 #2/0 #4/0
8
45 71 114 180 290 360 580
10
36 57 91 145 230 290 460
15
24 38 60 96 153 192 300
20
18 29 45 72 115 145 232
30
12 19 30 48 77 97 154
40
9 14 23 36 58 72 112
50
7 11 18 29 46 58 86
60
6 9 15 24 38 48 77
Amps #8 #6 #4 #2 #1/0 #2/0 #4/0
8
90 142 228 360 580 720 1160
10
72 114 182 290 460 580 920
15
48 76 120 192 306 384 600
20
36 58 90 144 230 290 464
30
24 38 60 96 154 194 308
40
18 28 46 72 116 144 224
50
14 22 36 58 92 116 172
60
12 19 30 48 77 97 154
Amps #8 #6 #4 #2 #1/0 #2/0 #4/0
8
112 177 285 450 725 900 1450
10
90 142 227 362 575 725 1150
15
60 95 150 240 382 480 750
20
45 72 112. 180 287 362 580
30
30 47 75 120 192 230 385
40
22.5 35 57 90 145 180 280
50
17.5 27 45 72 115 145 215
60
15 23 37 60 96 121 192
Amps #8 #6 #4 #2 #1/0 #2/0 #4/0
8
22 35 57 90 145 180 290
10
18 28 45 72 115 145 230
15
12 19 30 48 76 96 150
20
9 14 22 36 57 72 116
30
6 9. 15 24 38 48 77
40
4 7 11 18 29 36 56
50
3 5 9 14 23 29 46
60
3 4 7 12 19 24 38.
12 Volt PV Array
16V MPP Typical
Distance in Feet (Two Wires)
1.5% Voltage Drop
12 Volt Battery
24 Volt PV Array
32V MPP Typical
Distance in Feet (Two Wires)
1.5% Voltage Drop
12 or 24 Volt Battery System
48 Volt PV Array
64V MPP Typical
Distance in Feet (Two Wires)
1.5% Voltage Drop
12, 24 or 48 Volt Battery
System
60 Volt PV Array
80V MPP Typical
Distance in Feet (Two Wires)
1.5% Voltage Drop
12, 24 or 48 Volt Battery
System
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