Electrical Connection SMA Technologie AG
Page 38 SI5048-11:EE4206 Technical Description
4. Attach the "DC —" conductor with the ring cable lug to the "DC —" connection and
tighten the retaining screw firmly (torque 4.0 Nm to 5.7 Nm).
5. Then attach the "DC +" conductor with the ring cable lug to the "DC +" connection
and tighten the retaining screw firmly (torque 4.0 Nm to 5.7 Nm).
6.3 AC Connection
6.3.1 Cable Protection
A sub-distribution unit must be used to connect the Sunny Island 5048 to a stand-alone
grid, a generator or the public grid.
6.3.2 AC1 (Loads/Sunny Boys)
The stand-alone grid sub-distribution (e.g. load, PV inverter (Sunny Boy), wind turbine
(Windy Boy)) is connected to the AC1 output of the Sunny Island 5048. If you wish to
provide separate protection for an individual load circuit, then use maximum 16 A, B-
type circuit breakers. In the case of a short circuit, the Sunny Island 5048 can still trigger
these types of automatic breakers:
Do not connect any other components to the cables that connect the battery to the
DC connection of the Sunny Island 5048. Such components must be connected
directly to the battery using separate cables.
The sub-distribution unit must be equipped with appropriate circuit breakers. Be
sure to observe all the applicable regional standards and guidelines.
The maximum permissible current that may flow through the AC input of a Sunny
Island 5048 is 56 A.
The Sunny Island 5048 is not equipped with an all-pole isolator: The neutral
conductor (N conductor) is looped through the device and the N connection
terminals of AC1 and AC2 are connected inside the device.
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