Sunny Island
Installation & Operating Instructions
BWRI33-12:EE
- 117 -
SMA Regelsysteme GmbH
Consumers
230 V 50 Hz/60 Hz
Fig. 12.1: Sunny Island as grid-forming element
This operating mode requires that there are no further components within the grid
that control the frequency or the voltage. No parallel operation with the public utility
or an independent synchronous generator is possible in this mode.
In this mode the Sunny Island can only charge the batteries whenever the compo-
nents within the grid (Sunny Boy inverters, synchronous generators) generate more
power than required. In case these components generate less power than consumed
within the grid the Sunny Island supplies the power to the grid by discharging the
batteries.
The charge degree of the batteries can therefore only be manipulated by controlling
the power generating components and the consumers within the grid.
Due to the battery management the Sunny Island can perform a full charge of high
quality even in this operating mode, that can take several days, if necessary (for ex-
ample if there are only photovoltaic feeders).
