SMA SMC 9000TL Installation - Manual (Page 21)

Installation Manual SMC9-11TLRP-IA-en-51 21
SMA Solar Technology AG 4 Product Description
The SMA Power Balancer is a function of the Sunny Mini Central, which allows three-phase grid
connection.
Using the SMA Power Balancer, you can connect three Sunny Mini Central inverters to a three-phase
feed-in unit, preventing unbalanced loads. Unbalanced load refers to power fed-in asymmetrically,
which depends on the country data set selected and may be between 4.6 kVA and 6 kVA.
Taking the local network operator's connection conditions into account, you can use the
SMA Power Balancer to implement three-phase line-voltage monitoring. This disconnects all three
Sunny Mini Central inverters completely from the electricity grid or limits their power in the event of a
grid error.
The connections for the SMA Power Balancer are galvanically isolated from the rest of the
Sunny Mini Central electronic circuit.
This Sunny Mini Central has a socket for connecting the SMA Power Balancer to the bottom of the
inverter. To connect three Sunny Mini Central inverters of the same type, you need a special Y cable.
You can only connect Sunny Mini Central inverters which have the same type of connection for the
SMA Power Balancer to one another. Sunny Mini Central inverters with a different type of connection
for the SMA Power Balancer can be retrofitted and connected with the Y cable.
Operating Modes of the SMA Power Balancer
Erläuterung_SMCTLRP_Power Balancer
Wenn setting the country data set VDE-AR-N4105-HP, the SMA Power Balancer is activated by
default and set to the operating mode PowerGuard. If the SMA Power Balancer is not connected to
the other inverters, there is no communicative coupling between the inverters and the different line
conductors and the feed-in power of the inverter is limited to 4.6 kVA.
By default, the SMA Power Balancer is deactivated for all other country data sets and can only be
activated with an SMA communication product. To activate the SMA Power Balancer, you can choose
from three operating modes.
4.5 SMA Power Balancer
Figure 7: Design of a three-phase feed-in unit with three Sunny Mini Central inverters with SMA Power Balancer