Two to four three-phase clusters, each with three Sunny Islands, can be connected in parallel. The
Multicluster Box is pre-wired for operation and equipped with a main connection for solar
systems or wind energy systems. The communication cables necessary for
installation are also included.
Larger systems are configured with Multicluster boxes that have a
source/load center like the one pictured above. With the appropriate Sunny
Island power panels, a Multicluster Box can seamlessly integrate
several Sunny Island inverters into one reliable AC/DC coupled power system.
Larger off-grid solar panel system AC grids are possible and reliable with Sunny Island Multiclusters.
SMA Multicluster for Larger Off-Grid Solar Systems
Because solar energy is available all over the world, most Sunny Island system solutions are primarily
based on the use of solar panel power. Moreover, solar panel systems are highly adjustable and
wear-resistant. Sunny Island also takes advantage of generators or AC utility grid to charge batteries.
Photovoltaic solar power allows one an extended power source when other resources are not available.
Multicluster Box Review
Integrated AC distribution for Sunny Island, generator and PV systems
Can accommodate various generator, PV and load sizes
For systems up to 100 kW
Load shedding, Sunny Island and generator contactors and circuit breakers
Circuit breaker for PV system
Reverse current monitoring
Simple emergency operation of the generator
The Multicluster-Box 12U features load breakers and AC distribution.
Two to four three-phase clusters, each with three Sunny Islands, can be connected in
3 inverters per
3-phase cluster. 4 clusters maximum per Multicluster Box.
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.
Multiclusters, each with three Sunny Islands charging batteries, can be connected in parallel
microgrid of Sunny Boy PV inverters for supplementing the local grid island AC power with
panel systems. Contact us for details.