SMA SI 3.0-11 Quick Reference Guide V.3.0 - Manual (Page 8)

2 Safety SMA Solar Technology AG
8 Ersatzstrom-IS-en-30 Installation - Quick Reference Guide
The utility grid connected to the automatic transfer switch must be a TN or TT system. The battery backup system is not
suitable for supplying life-sustaining medical devices.
In battery backup systems, the Sunny Island uses lead-acid batteries or lithium-ion batteries for energy storage. Ensure
that the battery room is sufficiently ventilated when using lead-acid batteries (see battery manufacturer's documentation).
If lithium-ion batteries are connected, the battery management of the lithium-ion battery must be compatible with the
Sunny Island (see the Planning Guidelines "SMA Flexible Storage System with Battery Backup Function" at
www.SMA-Solar.com). The lithium-ion battery must be able to supply enough current at maximum output power of the
Sunny Island inverter (for technical data, see the Sunny Island inverter installation manual).
In single-phase battery backup systems, the multifunction relays of the Sunny Island inverter cannot be configured.
In three-phase battery backup systems, the slaves can control devices in the system (e.g., load-shedding contactors),
each via two multifunction relays. The multifunction relays of the master cannot be configured.
The automatic transfer switch must be wired and connected in accordance with this documentation. The equipment or
devices of the automatic transfer switch must satisfy protection class II and be operable without prior knowledge of
electrical technology.
In battery backup systems, the following products must not be connected:
• Sunny Island Charger or other DC charge controllers
• DC loads
The battery backup system records the grid feed-in and purchased electricity with an SMA Energy Meter only.
An SMA Energy Meter does not replace the energy meter of the electric utility company. The grid feed-in and the
purchased electricity are transmitted to one Sunny Island via Speedwire. Therefore, the Sunny Island must be fitted with
the Speedwire data module Sunny Island.
The Sunny Home Manager must not be installed in PV systems in which a Sunny WebBox is installed.
The individual products in the battery backup system must be used for their intended purpose (see documentation of each
product). Any use of the system other than that described in the Intended Use section does not qualify as appropriate.
The enclosed documentation is an integral part of the products. Keep the documentation in a convenient place for future
reference and observe all instructions contained therein.