SMA SI 3.0-11 Installation - Manual (Page 16)

5 Product Description SMA Solar Technology AG
16 SI30M-44M-60H-80H-IA-en-30 Installation Manual
5 Product Description
5.1 Sunny Island
The Sunny Island is a battery inverter which controls the electrical energy balance in an off-grid system, in a battery
backup system, or in a system for increased self-consumption. In a battery backup system, you can also use the
Sunny Island for increased self-consumption.
Figure 4: Design of the Sunny Island inverter
The Sunny Island supplies AC loads in the system from a battery or charges the battery with the energy provided by AC
sources (e.g. PV inverter). AC sources supply loads and are used by the Sunny Island to recharge the battery. In order
to be able to increase the availability of the off-grid system and reduce the battery capacity, the Sunny Island can use
and control a generator as an energy reserve.
The loads may temporarily overload the Sunny Island. If there is a short circuit, the Sunny Island briefly feeds short-circuit
currents into the utility grid. As a result, the Sunny Island may trip certain circuit breakers (see Section 10 "Technical Data",
page 94).
Type label
The type label clearly identifies the product. The type label is located on the right-hand side of the enclosure (for a
description of the type label, see the Sunny Island inverter operating manual).
You will require the information on the type label to use the product safely and when seeking customer support from the
SMA Service Line.
5.2 Scope of Functions of Device Types SI3.0M-11 and SI4.4M-11
The following functional restrictions apply for device types SI3.0M-11 and SI4.4M-11:
• All Sunny Island inverters in a cluster must be of the same device type.
• Device types SI3.0M-11 and SI4.4M-11 do not support all off-grid system variants. Single-phase systems can
include a maximum of one Sunny Island SI3.0M-11 or SI4.4M-11. Three-phase systems can include a maximum of
three Sunny Island SI3.0M-11 or SI4.4M-11.
Only device types SI6.0H-11 and SI8.0H-11 are suitable for single-phase single cluster systems and three-phase
multicluster systems (see the Quick Reference Guide "Off-Grid Systems").
Position Designation
A Ventilation grid
B Type label
C Control panel
D Enclosure lid