Electrical Connection SMA Solar Technology AG
24 SMC9-11TLRP-IEN100640 Installation Guide
5.2 Connection to the Public Grid (AC)
5.2.1 Conditions for the AC Connection
Dimensioning of the Cables
The conductor cross-section should be dimensioned in a way that output losses do not exceed 1 % at
nominal power. Use "Sunny Design" (www.SMA.de/en) for this.
The maximum cable lengths relative to the conductor cross-section are shown in the following table.
The conductor cross-sectional area required in individual cases depends on the following factors:
• ambient temperature,
•routing method,
•UV resistance.
Cable Requirements
Connection requirements of the utility operator
Always observe the connection requirements of your utility operator!
Conductor cross-
section
Maximum wire length
SMC 9000TL-10 /
SMC 9000TLRP-10
SMC 10000TL-10 /
SMC 10000TLRP-10
SMC 11000TL-10 /
SMC 11000TLRP-10
16.0 mm² 27 m 24 m 22 m
25,0 mm²
a)
43 m 38 m 35 m
a)
Only use flexible cables!
Cut line losses in half
If three inverters with symmetrical feeding are combined to form a three-phase system, the
neutral conductor is not subjected to any load, and the line losses are halved. Thus, the
maximum possible cable length is doubled.
Position Description Value
A External diameter 18 mm … 32 mm
B Conductor cross-section Max. 25 mm²
C Strip insulation Approx. 18 mm
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