SMA Solar Technology AG Electrical Connection
Installation Guide SMC9-11TLRP-IEN100640 39
5.6 Connection of the SMA Power Balancer
The Sunny Mini Central is equipped with the SMA Power Balancer as standard. This enables a circuit
connection of three 3 Sunny Mini Central to a three-phase feed-in system.
Each of the 3 Sunny Mini Central devices in a group must be connected to a different phase conductor
of the low-voltage grid (L1, L2 and L3)!
By activating this circuit, you can stipulate how the other two Sunny Mini Central devices are to react
if there is a device fault with the third Sunny Mini Central or there is a grid voltage fault in its phase.
The connections for the SMA Power Balancer are galvanically isolated from the rest of the Sunny Mini
Central circuit.
5.6.1 Configuration
The SMA Power Balancer is deactivated at the factory using the "PowerBalancer" parameter
(parameter setting = off) and can only be activated and configured using a communication device.
To change the "PowerBalancer" parameter, you need a personal access code - the so-called SMA
Grid Guard Code. The application form for the personal access code is located in the download area
at www.SMA.de/en, in the "Data sheet" category for each inverter.
The configuration options are detailed below.
Three-phase grid connection
For further information on this subject, see the technical information "Three-phase grid
connection with Sunny Mini Central" in the download area at www.SMA.de/en.
Cable for the connection of the SMA Power Balancer connector system
The cable for the connection is not provided as standard, but rather must be ordered
separately from SMA Solar Technology AG (see section 12”Accessories” (page88)).
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