SMA SI 3.0-11 Quick Reference Guide V.3.0 - Manual (Page 15)

SMA Solar Technology AG 3 Information and System Description
Installation - Quick Reference Guide Ersatzstrom-IS-en-30 15
When the utility grid is available again, the battery backup system synchronizes the battery backup grid with the utility
grid. Following successful synchronization, the automatic transfer switch connects the battery backup grid to the utility
grid. If the automatic transfer switch is connected to the utility grid, the battery backup system uses the battery for
increased self-consumption.
You can set up and wire the automatic transfer switch yourself or acquire it pre-wired from another provider (see Planning
Guidelines "SMA Flexible Storage System with Battery Backup Function" at www.SMA-Solar.com).
Connection of loads and the PV system
The automatic transfer switch is not a distribution board for the loads or the PV system. You must also install the
necessary protective devices for the loads and the PV system.