Battery Management And Charge Control; Sma Operation - SMA Sunny Island SIC50-MPT Installation Manual

Battery Management and Charge Control

SMA Solar Technology AG
4 Battery Management and Charge Control
4.1 SMA Operation
The SIC-PB communication interface must be installed and connected to the Sunny Island 5048/
2012/2224 for SMA operation. If a communication connection is established, the Sunny Island will
control of battery management, including charge control.
The charge controller receives the current and temperature-compensated nominal charging voltage
from the Sunny Island and transmits the battery's present charging current back to the Sunny Island.
This ensures that the battery is always optimally charged and that the Sunny Island calculates the
correct charging state. For further details on battery management see the Sunny Island
documentation.
If communication does not function in SMA operation, the battery will only be charged with voltages
of 13.5/27/54 V.
Working principle of a Sunny Island system with a charge controller
Battery
Charge controller
Sunny Island
Array
Sync bus (CAN)
Sunny Boy
12 SIC50-IA-en-11 Installation Guide