SMA Sunny Island Inverters

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-phase off-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.

Solar Battery Backup Systems

Complete on-grid and off-grid battery-based power systems include Sunny Island solar battery backup systems.

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SMA Sunny Island 4548-US Inverter
SMA Sunny Island 6048-US Inverter

The Sunny Island monitors the set voltage and frequency limits on the grid. If these limits are not observed, it disconnects from the external source without interruption and changes to off-grid operation. The Sunny 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

Sunny Island Inverters with Multicluster Box and batteries, large system

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 into one reliable AC/DC coupled power system.

off-grid solar battery system with Sunny Island inverters

US Army, Marshall Islands
Sunny Island Multicluster Solar System Project

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 remote 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 power. 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 your next SMA Multicluster project.

Sunny Island inverters are used in our SDC Remote Microgrid Systems & Residential Battery Backup Systems.

Reliable Intelligent Battery Charging

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.

Multicluster systems can become microgrids for
larger local AC grids.

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 microgrid
of Sunny Boy PV inverters for supplementing the local grid island AC power with solar panel systems. Contact us for details.

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