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29. Wire Distance Chart
To meet NEC compliance (North America), the largest PV array that can be connected to the FLEXmax
80 must have a rated short-circuit current of 64 amps or less The following charts show the maximum
distance of various gauge two-conductor copper wire from the PV array to the FLEXmax 80 with a
1.5% maximum voltage drop. Temperature and conduit ll corrections may be required. Using a higher
voltage PV array with a low voltage battery system allows you to use a much smaller wire size or go up
to 5 times as far with the same gauge wire.
(The gures below assumes 2 conductor copper wire and allows for a 1.5% voltage drop)
12V PV ARRAY (16v Vmp)
#8 #6 #4 #3 #2 #1/0 #2/0 #4/0
10 15 24 39 49 62 98 124 197
20 8 12 19 24 31 49 62 99
30 5 8 13 16 21 33 41 66
40 4 6 10 12 15 25 31 49
50 3 5 8 10 12 20 25 39
60 3 4 6 8 10 16 21 33
70 2 3 6 7 9 14 18 28
WIRE GAUGE
AMPS
24V PV ARRAY (32v Vmp)
#8 #6 #4 #3 #2 #1/0 #2/0 #4/0
10 31 49 78 98 124 197 248 395
20 15 24 39 49 62 98 124 197
30 10 16 26 33 41 66 83 132
40 8 12 19 24 31 49 62 99
50 6 10 16 20 25 39 50 79
60 5 8 13 16 21 33 41 66
70 4 7 11 14 18 28 35 56
WIRE GAUGE
AMPS
36V PV ARRAY (48v Vmp)
#8 #6 #4 #3 #2 #1/0 #2/0 #4/0
10 46 73 117 147 186 295 372 592
20 23 37 58 73 93 148 186 296
30 15 24 39 49 62 98 124 197
40 12 18 29 37 46 74 93 148
50 9 15 23 29 37 59 74 118
60 8 12 19 24 31 49 62 99
70 7 10 17 21 27 42 53 85
WIRE GAUGE
AMPS
METRIC
#8…8.37mm
2
#6…13.30mm
2
#4…21.15mm
2
#3…26.7mm
2
#2…33.6mm
2
#1/0…53.5mm
2
#2/0…67.4mm
2
#4/0…107mm
2