SMA Solar Technology AG
3 Product Description
Operating Manual
SI80H-BE-BEN120810
13
3 Product Description
3.1 Sunny Island 8.0H / 6.0H
The Sunny Island is a bidirectional off-grid inverter and forms a stand-alone grid.
Figure 2: Design of the Sunny Island 8.0H / 6.0H
The Sunny Island supplies AC loads in the stand-alone grid from a battery or charges the battery with
the energy provided by sources on the AC side. AC sources in the stand-alone grid (e.g. PV inverters)
supply loads and are used by the off-grid inverter to recharge the battery. In order to increase the
availability of the stand-alone grid and reduce the battery capacity, the Sunny Island can use and
control external energy sources (e.g. a generator) as an energy reserve.
The Sunny Island supplies the loads with active power and reactive power. The loads may temporarily
overload the Sunny Island. If there is a short circuit in the the stand-alone grid, the Sunny Island also
briefly feeds in short-circuit currents to the stand-alone grid. As a result, the Sunny Island may trip
miniature circuit-breakers. Miniature circuit-breakers only disconnect electric circuits that are affected
by the fault.
The off-grid system must be a TN or TT system. The Sunny Island does not support IT systems.
Position
Designation
A
Ventilation grid
B
Type label
C
Control panel
D
Enclosure lid
