Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 165 -
SMA Regelsysteme GmbH
11.6 Multiple Sunny Island Systems (w/ Data interchange)
Even in systems with high overload capable devices, such as the Sunny Island, there
may be the demand for higher power. To this end, it is possible to connect Sunny
Islands in parallel.
11.6.1 Single-Phase System
In a single-phase system it is possible to connect up to three Sunny Islands in paral-
lel to the same battery. As only one of these Sunny Islands will have the opportunity
to perform the battery management and the control of the generator, this has to know
the actual battery current of all Sunny Islands. A communication cable between the
COM1 ports of the Sunny Islands is therefore required.
Fig. 11.6: Three Sunny Islands, single-phase system w/ data interchange
An extra feature possible due to this configuration is the load-dependent en-/disabling
of the additional Sunny Islands (see Fig. 11.7).