For on-grid solar system battery backup and off-grid remote power systems
Flexible and expandable, Sunny Island inverters are capable of single phase systems up
to 36 kW and three phase systems up to 110 kW using a Multicluster-Box.
The SMA Sunny
Island 4548-US and Sunny Island
6048-US inverters are based on proven off-grid technology and feature industry
leading power output. A maximum efficiency of 96 percent ensures peak production, which
results in reduced diesel usage in rural communities. More flexible sizing allows for simplified system
planning. And, with Multicluster technology,
up to 12 Sunny Islands can be integrated into 3-phaseoff-grid
power systems up 110 kW in size. The SMA Smartformer is available for smaller
split-phase systems up to 8 kW.
For Grid-Connected Solar Systems
The Sunny Island can be added to any existing grid-tied system for battery backup power during power outages.
Normally, the grid-tie inverter will shut off during a power outage leaving you without power. With a Sunny
Island system, the solar panels for your grid-tie inverter supplies AC power to charge
your battery bank, even when the utility power is out.
The Sunny Island monitors the set voltage and frequency limits on the grid. If these limits are not
it disconnects from the external source without interruption and changes to off-grid operation. The
Island reliably supplies power for loads and intelligently monitors and charges battery banks with the
energy from grid-feeding units such as solar panels, wind or a generator connected on your AC side.
For Off-Grid Remote Solar or Island Power Microgrids
Featuring sophisticated generator management and true battery state of charge control, the Sunny Island
can control a diesel generator connected to it in an extremely fuel efficient manner. It is designed to
be integrated into the public or island grid power grid, and connected to solar system microgrids with
Sunny Boy inverters that are distributed anywhere along the AC grid. The Sunny Island can also
deactivate loads automatically if the battery does not provide sufficient electrical energy.
SMA Sunny Island Inverter Review
The Sunny Island is ideal for remote off-grid microgrid
systems. Larger systems like the one above are configured with Multicluster-Box enclosures that have a
source/load center. Each 3-phase Multicluster-Box supports 3 Sunny Islands. A
Sunny Island Multicluster can seamlessly integrate several Sunny Island inverters
one reliable AC/DC coupled power system.
Critical power for the US Department of Defense
Solar Electric Supply designed and supplied this 30 kW Sunny Island system to the US Army on the
Bikini Atoll Islands in 2011. It provides critical power for satellite communications, a school, and
base power. The AC coupled system uses a four Sunny Boy 5KW PV inverters and solar panel arrays
distributed on the base that feed the six Sunny Island inverters for 30 kW 208 VAC three phase
Dual 30 kW diesel gensets are controlled by the Sunny Islands and Multicluster for backup and load
sharing. A parallel Deka sealed AGM battery bank rated at 130 kWh @ 48 VDC provides backup power at
night and during cloudy weather. Save time and money by contacting us for
next SMA Multicluster project.
The redundant design of AC and DC coupling, and expandability of the systems with the Sunny Island
guarantee the highest reliability and flexibility.
Designed for partial load operation, the Sunny Island has extremely low open-circuit and standby
consumption which results in reduced diesel usage in rural communities. The Sunny Island monitors the
set voltage and frequency limits on the grid and generator. If these limits are not observed, it
disconnects from the external source without interruption and changes to off-grid operation.
The critical component in off-grid power systems, the battery, is monitored diligently and utilized
cost-effective batteries can be used without affecting performance. Possible an improved utilization of
the battery capacity, which also means that smaller and thus more cost-effective batteries can be used
without affecting performance.
In order to prevent premature aging caused by incorrect charging and frequent deep discharge, the Sunny
Island has an intelligent charge control and reliable deep discharge
protection. Because of these functions the battery service life can be greatly
extended in comparison with simpler devices.
Despite its complex functioning, the Sunny Island is easy to configure. All the settings required for
operation can be quickly and easily programmed in a few steps using the ”Quick Configuration Guide”. By
employing the concept of central operation referred to as ”Single Point of Operation”, the
system/cluster parameters are only set on the master device, and all other devices adopt the
configuration automatically. The easy-to-understand menu navigation allows quick access to all important
data, even while the system is running. An SD card provides uncomplicated system control, and thus
facilitates any service work.
Two to four three-phase clusters, each with three Sunny Islands, can be connected in parallel.
Sunny Island Battery Multicluster Systems with
Sunny Boy Inverter Solar System Microgrid on Large Local AC Grid
Multiclusters, each with three Sunny Islands
charging batteries, can be connected in parallel to a
of Sunny Boy PV inverters for supplementing the local grid island AC
power with solar panel systems. Contact us for