SMA AUTOMATIC SWITCH BOX L - Manual (Page 7)

SMA Solar Technology AG Safety
Installation Guide AS-BoxL-IEN084410 7
2 Safety
2.1 Appropriate Usage
The Automatic Switch Box is a changeover facility for Sunny Backup systems. Sunny Backup regulates
and controls the Automatic Switch Box and acts as an island grid in case of a power outage. During
a power outage, the Automatic Switch Box safely separates the connected PV system and the
connected consumer loads from the public grid and connects them to the island grid.
You have the option of integrating a generator into the Sunny Backup system if you selected the
"Generator connection" feature when you ordered the Automatic Switch Box. The generator
connection can be ordered as an option but cannot be retrofitted.
If a generator is integrated into the Sunny Backup system, the Automatic Switch Box switches it to the
island grid in case of a power outage.
The Automatic Switch Box may only be operated in conjunction with three Sunny Backups. In this
case, one of the three Sunny Backups is configured as the master and the other two as slaves. Consult
the Sunny Backup 5000 manual for more details. The Sunny Backup master evaluates the data
recorded in the Automatic Switch Box, coordinates all switching operations and controls all
components of the Sunny Backup system.
Do not exceed the maximum connection power of the individual outgoing lines (e.g. maximum AC PV
power to be connected: 30 kW) in the Automatic Switch Box.
Do not use the Automatic Switch Box for purposes other than those described here. Alternative uses,
modifications, and the installation of components void the warranty claims and operation permit.
Connection requirements
The Sunny Backup system is only certified for TN grids and may not be installed in TT grids.