Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 23 -
SMA Regelsysteme GmbH
2.2 Battery Management
The battery management monitors the limit values for current, voltage and tempera-
ture, calculates the current state of charge and battery state, controls and monitors
the charge depending on the previous situations and can control an electrolyte circu-
lation pump as well as a battery room fan.
In order to have always reliable battery-related measured values, the Sunny Island
has to be the only device in the system that is connected to the battery directly.
External devices connected to the battery (e. g. DC loads or battery
chargers) will lead to a faulty battery management! This will not only
result in wrong battery states and associated erroneous switching op-
erations but also in an incorrect estimation of the battery’s condition
and thus to a significant reduction of the battery’s lifetime!
The associated parameters are described in Chapter 8.5.
All settings for the first operation are described in Chapters 6.1.1.
After having exchanged the lead storage battery of the system, restart
the Sunny Island(s) and follow the instructions in Chapter 6.2.