SMA SI 3.0-11 Quick Reference Guide V.4.0 - Manual (Page 7)

SMA Solar Technology AG 2 Safety
Installation Manual - Quick Reference Guide FSS-IS-en-40 7
2 Safety
2.1 Intended Use
The SMA Flexible Storage System supports increased self-consumption through the following measures:
• Intermediate storage of excess PV energy with Sunny Island
• Load control and PV system monitoring with Sunny Home Manager
The SMA Flexible Storage System does not form a battery backup grid in the event of utility grid failure (for installation
of a battery backup system, see Quick Reference Guide "SMA Flexible Storage System with Battery Backup Grid").
The SMA Flexible Storage System must only be used in those countries for which it is licensed or in those countries for
which it is approved by SMA Solar Technology AG and the grid operator. The grid configuration must be a TN or TT
system.
The SMA Flexible Storage 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. To enable this, 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.
In the SMA Flexible Storage System, the Sunny Island uses lead-acid batteries or lithium-ion batteries for energy storage.
A fuse switch-disconnector (e.g., BatFuse) must be installed between the battery and the Sunny Island. In systems with
lead-acid batteries, you must ensure that the battery room is sufficiently ventilated (see battery manufacturer
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 Smart Home" at www.SMA-Solar.com).
Three Sunny Island inverters can be connected to form a three-phase cluster. A cluster is connected in parallel on the DC
side and a shared battery is connected. Only Sunny Island inverters of the same device type may be installed in a cluster.
More than one cluster cannot be connected.
The SMA Flexible Storage System can be installed at altitudes of up to 2,000 m above Mean Sea Level.
The following products must not be connected in the SMA Flexible Storage System:
• Sunny Island Charger or other DC charge controllers
• DC loads
The system must be used as intended. Any use other than that described in the Intended Use section does not qualify as
appropriate.
The documentation supplied with the products is an integral part of the respective products. Keep the documentation in
a convenient place for future reference and observe all instructions contained therein.
2.2 Safety Precautions
This section contains safety precautions that must be observed at all times when working on or with the
SMA Flexible Storage System. To prevent personal injury and property damage and to ensure long-term operation of the
SMA Flexible Storage System, read this section carefully and comply with the safety precautions at all times.
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Danger to life from electric shock due to live voltage
High voltages are present in the SMA Flexible Storage System. When covers (e.g., an enclosure lid) are removed,
live components can be touched, which can result in death or serious injury due to electric shock.
• When carrying out any work on the electrical installation, wear suitable personal protective equipment.
• Before removing a cover, disconnect the relevant device from voltage sources (see documentation of the relevant
device).