44 SMC9-11TLRP-IA-en-51 Installation Manual
6 Electrical Connection SMA Solar Technology AG
Requirements:
☐ Every inverter must be connected to a line conductor L1, L2 or L3 of the electricity grid
(for information on the three-phase grid connection, see the Technical Information "Three-Phase
Grid Connection" at www.SMA-Solar.com).
☐ All three inverters must be equipped with the SMA Power Balancer plug-in system.
Hint: If an inverter is not equipped with a SMA Power Balancer plug-in system, you can order a
retrofit kit (see section 13 "Accessories", page 91).
☐ The Y cable for the SMA Power Balancer plug-in system must be available.
1. Disconnect the inverter from all voltage sources (see section 9).
2. To extend the Y cable:
• Cut the Y cable in the middle.
• Connect the conductors and cable shield 1:1 to the extension cord inside a junction box.
Observe the maximum cable length of 300 m.
3. Remove the screw cap from the socket of each
inverter.
4. Insert the plug of the Y cable with the two cable
inputs into the socket of the middle inverter and
tighten it.
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