89
TriStar MPPT 600V Operator’s Manual
88
10.0 Appendix
*Ampacity for not more than three current-car-
rying conductors in a raceway, cable, or earth
(buried).
2% Voltage Drop Charts for 90° Stranded Copper Wire
1-Way Wire Distance (feet), 48 Volt System
60
Amps
55
Amps
50
Amps
45
Amps
40
Amps
35
Amps
30
Amps
25
Amps
20
Amps
15
Amps
00
89.6
97.8
107.5
119.5
134.4 153.6 179.2 215.1 268.9 358.5
0
71.0
77.5
85.2
94.7
106.6 121.8 142.1 170.5 213.1 284.2
2
44.7
48.7
53.6
59.6
67.0
76.6
89.3
107.2 134.0 178.7
4
28.1
30.7
33.8
37.5
42.2
48.2
56.3
67.5
84.4
112.6
6
17.7
19.3
21.2
23.5
26.5
30.3
35.3
42.4
53.0
70.6
8
11.1
12.2
13.4
14.9
16.7
19.1
22.3
26.7
33.4
44.6
10
7.0
7.6
8.4
9.3
10.5
12.0
14.0
16.8
21.0
28.0
12
4.4
4.8
5.3
5.8
6.6
7.5
8.8
10.5
13.1
17.5
14
2.8
3.0
3.3
3.7
4.1
4.7
5.5
6.6
8.3
11.0
Table 9.5 Maximum 1-way wire distance for 48V systems, stranded copper
1-Way Wire Distance (meters), 48 Volt System
Wire
Size
(mm
2
)
60
Amps
55
Amps
50
Amps
45
Amps
40
Amps
35
Amps
30
Amps
25
Amps
20
Amps
15
Amps
70
27.3
29.8
32.8
36.4
41.0
46.8
54.6
65.6
82.0
109.3
50
21.7
23.6
26.0
28.9
32.5
37.1
43.3
52.0
65.0
86.6
35
13.6
14.9
16.3
18.2
20.4
23.3
27.2
32.7
40.8
54.5
25
8.6
9.4
10.3
11.4
12.9
14.7
17.2
20.6
25.7
34.3
16
5.4
5.9
6.5
7.2
8.1
9.2
10.8
12.9
16.1
21.5
10
3.4
3.7
4.1
4.5
5.1
5.8
6.8
8.1
10.2
13.6
6
2.1
2.3
2.6
2.8
3.2
3.7
4.3
5.1
6.4
8.5
4
1.3
1.5
1.6
1.8
2.0
2.3
2.7
3.2
4.0
5.3
2.5
0.8
0.9
1.0
1.1
1.3
1.4
1.7
2.0
2.5
3.4
Table 9.6 Maximum 1-way wire distance for 48V systems, stranded copper
Notes:
•
The specified wire length is for a pair of conductors from the solar or battery source to the
controller (1-way distance)
• Shaded cells in the table indicate that the current exceeds the ampacity of the wire for a
given ambient temperature as defined in the following table:
Wire Ampacity* Key
Exceeds wire ampacity at 60°C ambient temperature
Exceeds wire ampacity at 50°C ambient temperature
Exceeds wire ampacity at 40°C ambient temperature
Exceeds wire ampacity at 30°C ambient temperature
*Ampacity for not more than three current-car-
rying conductors in a raceway, cable, or earth
(buried).
2% Voltage Drop Charts for 90°C Solid Copper Wire
1-Way Wire Distance (feet), 48 Volt System
60
Amps
55
Amps
50
Amps
45
Amps
40
Amps
35
Amps
30
Amps
25
Amps
20
Amps
15
Amps
00
111.2
121.3 133.5 148.3 166.8 190.6 222.4 266.9 333.6 444.8
0
88.2
96.2
105.8
117.6
132.3 151.2 176.4
211.7
264.6 352.8
2
55.4
60.5
66.5
73.9
83.2
95.1
110.9
133.1 166.3 221.8
4
34.9
38.0
41.9
46.5
52.3
59.8
69.8
83.7
104.6 139.5
6
21.9
23.9
26.3
29.2
32.9
37.6
43.9
52.6
65.8
87.7
8
13.8
15.1
16.6
18.4
20.7
23.7
27.6
33.1
41.4
55.2
10
8.7
9.5
10.4
11.6
13.0
14.9
17.4
20.8
26.0
34.7
12
5.5
6.0
6.5
7.3
8.2
9.4
10.9
13.1
16.4
21.8
14
3.4
3.7
4.1
4.6
5.1
5.9
6.9
8.2
10.3
13.7
Table 9.7 Maximum 1-way wire distance for 48V systems, solid copper
1-Way Wire Distance (meters), 48 Volt System
Wire
Size
(mm
2
)
60
Amps
55
Amps
50
Amps
45
Amps
40
Amps
35
Amps
30
Amps
25
Amps
20
Amps
15
Amps
70
33.9
37.0
40.7
45.2
50.8
58.1
67.8
81.4
101.7 135.6
50
26.9
29.3
32.3
35.8
40.3
46.1
53.8
64.5
80.6
107.5
35
16.9
18.4
20.3
22.5
25.4
29.0
33.8
40.6
50.7
67.6
25
10.6
11.6
12.8
14.2
15.9
18.2
21.3
25.5
31.9
42.5
16
6.7
7.3
8.0
8.9
10.0
11.5
13.4
16.0
20.1
26.7
10
4.2
4.6
5.0
5.6
6.3
7.2
8.4
10.1
12.6
16.8
6
2.6
2.9
3.2
3.5
4.0
4.5
5.3
6.3
7.9
10.6
4
1.7
1.8
2.0
2.2
2.5
2.9
3.3
4.0
5.0
6.7
2.5
1.0
1.1
1.3
1.4
1.6
1.8
2.1
2.5
3.1
4.2
Table 9.8 Maximum 1-way wire distance for 48V systems, solid copper
Notes:
•
The specified wire length is for a pair of conductors from the solar or battery source to the
controller (1-way distance)
• Shaded cells in the table indicate that the current exceeds the ampacity of the wire for a
given ambient temperature as defined in the following table:
Wire Ampacity* Key
Exceeds wire ampacity at 60°C ambient temperature
Exceeds wire ampacity at 50°C ambient temperature
Exceeds wire ampacity at 40°C ambient temperature
Exceeds wire ampacity at 30°C ambient temperature
