Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 128 -
SMA Regelsysteme GmbH
8.8 Menu “PARSB“ (3+8), Parameters Sunny Boy
This menu can only be selected after the installer password (level: 1) has been en-
tered.
Fig. 8.15:
Menu “PARSB“ (3+8)
You should define settings in the menu “PARSB“ (3+8) if there are Sunny Boy invert-
ers in the island grid which are to be controlled by the Sunny Island via the RS485
interface (COM2). To this end a communication cable has to be installed between the
Sunny Island and the Sunny Boy(s).
Depending on the Sunny Boy’s firmware it is also possible to control the Sunny Boys
via the grid’s frequency without the need of a dedicated communication cable. In this
case “801_Sunny Boys” should be set to “Frequency”).
In “droop mode” (see Chapter 2.1.3) the Sunny Boys have to be adjusted to and will
be controlled via the P vs. f characteristics of the Sunny Island. Consequently,
“801_Sunny Boys” should be set to “Not installed” in this mode.
In order to shut down all frequency-sensitive power sources connected to the grid,
the Sunny Island can raise the grid’s frequency (running in RUN_U) when no more
power can be fed into the battery. Nevertheless, more energy will be supplied into the
AC-grid than can be used by all loads. In this case, this “emergency cutout mode”
prevents the system to shut down completely when the sources are not capable of
derating via frequency or RS485 communication.