SMA E-Panel installation manual
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1 0 - 2 3 4 - 1 R E V : A
Appendix A
Wire size based on breaker size @75°C.
Breaker Size
AWG Wire Size
Wire Size mm
2
10 Amp
16 AWG
1.31 mm
2
15 Amp
14 AWG
2.08 mm
2
20 Amp
12 AWG
3.31 mm
2
30 Amp
10 AWG
5.26 mm
2
40 Amp
8 AWG
8.36 mm
2
50 Amp
8 AWG
8.36 mm
2
60 Amp
6 AWG
13.3 mm
2
70 Amp
4 AWG
21.1 mm
2
80 Amp
4 AWG
21.1 mm
2
90 Amp
2 AWG
33.6 mm
2
100 Amp
2 AWG
33.6 mm
2
125 Amp
1/0 AWG
53.5 mm
2
175 Amp
2/0 AWG
67.4 mm
2
250 Amp
4/0 AWG
107 mm
2
Appendix B
Classic Breaker and wire sizing chart
Model
Battery
Voltage
MPPT
Voltage
In/out
Ratio
Output
Amps
0utput
Breaker
Wire
Gauge
Input
Amps
Input Breaker / Wire size
Classic 150
48
70
1.45
86
90-100
4AWG
59.31
80A/4AWG 150V
Classic 150
48
90
1.87
83
90-100
4AWG
44.38
63A 150V
Classic 150
48
100
2.08
80
80-90
4AWG
38.46
50A/8AWG - 63A/ 6AWG 150V
Classic 150
48
110
2.29
76
80-90
4AWG
33.18
50A/8AWG-63A/6AWG 150V
Classic 150
48
120
2.5
76
80-90
4AWG
30.4
50A/8AWG-63A/6AWG 150V
Classic 200
48
70
1.46
76
80-90
4AWG
52.05
80A/4AWG 300V
Classic 200
48
120
2.5
70
70-80
4AWG
28
50A/6AWG or 8AWG 300V
Classic 200
48
140
2.92
65
70-80
4AWG
22.26
50A/6AWG or 8AWG 300V
Classic 200
48
160
3.33
65
70-80
4AWG
19.52
30A110AWG-50A/6AWG or 8AWG300V
Classic 250
48
180
3.75
55
60-83
6-4AWG
14.66
30A/10AWG - 50A/6AWG or 8AWG 300V
Classic 250
48
200
4.16
53
60-63
6AWG
12.74
30A/10AWG-50A/6AWG or 8AWG300V
Appendix C
Torque for electrical connections on all E-Panels
Torque small busbar screws to 20-30 IN-LBS (2.3NM)
Torque large busbar screws to 45 IN-LBS (5.1 NM)
Torque Dinrail circuit breakers to 20 IN-LBS (2.3NM)
Torque battery disconnect breaker to 15 Ft-Lbs. (20.4NM)
