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Electrical Connection
6.5.1 AC cable requirements
Cable sizing
Use the free design programs "Solar Design Tools" at www.SMA-America.com to determine the
correct string configuration.
Connection requirements of the utility operator
Always observe the connection requirements of your grid operator.
The maximum cable lengths relative to the conductor cross-section are shown in the following table.
Conductor cross-
section
2 AWG (35 mm²),
194 °F (90 °C)
copper cable
4 AWG (25 mm²),
194 °F (90 °C)
copper cable
6 AWG, (16 mm²),
194 °F (90 °C)
copper cable
Use only solid or stranded wire but not fine stranded wire.
• Ambient temperature
• Routing method
Position
Name
A
Coductor cross-section
B
Strip insulation
32
SB8-10TL-IUS103811
Maximum cable length
SB 8000TL-US
184 ft (56 m)
115 ft (35 m)
72 ft (22 m)
The higher the ambient temperature, the higher are the power
losses. Use cables with a large cross-section at installations with
high ambient temperatures.
The cables heat up during operation. If there are several cables in
a cable conduit, the temperature of all cables increases. Use
cables with a large cross-section if you lay several cables in one
cable conduit.
SB 9000TL-US
164 ft (50 m)
103 ft (31 m)
65 ft (20 m)
Value
6 ... 2 AWG (16 ... 35 mm²)
3
⁄
in. (18 mm)
4
SMA America, LLC
SB 10000TL-US
148 ft (45 m)
92 ft (28 m)
58 ft (18 m)
Installation Guide
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