Outback Power Systems MX60 user manual Voltage Drop 12, 24 or 48 Volt Battery System

To meet NEC compliance, the largest PV array that can be connected to the MX60 should have a rated short-circuit current of 48 amps. The following charts show the maximum distance of various gauge two-conductor copper wire from the PV array to the MX60 with a 1.5% maximum voltage drop. Temperature and conduit fi 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.

Wire Distance Chart

12 Volt PV Array

16V MPP Typical

Distance in Feet

(Two Wires)

1.5% Voltage Drop

12 Volt Battery System

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

Amps	Wire Gauge
	#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	4	23	29	46
Amps	Wire Gauge
	#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
Amps	Wire Gauge
	#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

80 OutBack Power Systems Inc.