SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

SMA Solar Technology AG The Sunny Island 5048
2 The Sunny Island 5048
2.1 Properties
The Sunny Island 5048 is a bidirectional inverter (battery inverter and charger) for stand-alone
systems. The Sunny Island supplies consumers on the stand-alone grid side and charges battery banks
with the energy from grid-feeding units connected on the AC side.
The comfortable support of AC and DC coupling, as well as the expandability of the systems formed
with the Sunny Island guarantee highest flexibility. In addition, innovative technology allows the
Sunny Island to achieve a maximum efficiency of more than 95 %. Optimized for partial load
operation, it impresses with low open-circuit and standby consumption. Due to the high overload
capabilities and the integrated output management, there is no need to oversize the Sunny Island.
The parallel operation of up to 3 devices on a single phase system or 3 devices on a three-phase
system enables the Sunny Island to be used to set up stand-alone grid supply systems with output
power of 3 kW … 26 kW and up to 300 kW in Multicluster systems. Thanks to its sophisticated
generator management, it can control connected diesel generators in a particularly gentle and fuelsaving
manner. The power distribution grid can also be integrated. The Sunny Island can also
deactivate loads automatically if the battery does not provide sufficient electrical energy.
The stand-alone grid's critical component, the battery, is monitored diligently and optimally utilized.
The intelligent battery management precisely records the battery's state of charge. This makes
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. Thanks to these
functions, the battery 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.
Saving Data and Events
Always use the SD card to save data and events. This way, in case of a failure, SMA Solar
Technology can help you quickly.
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 with virtually no interruption and changes to
stand-alone grid operation. The Sunny Island 5048 also has an integrated anti-islanding feature. This
is a protective procedure for preventing unintended islanding on the generator and/or external
power supply line point.
Technical Description SI5048-TB-TEN110340 13