SMA SI 3.0-11 Installation - Manual (Page 32)

7 Electrical Connection SMA Solar Technology AG
32 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.4.5 Connecting the Generator in an Off-Grid System
In single systems and single cluster systems, connect a generator to connection AC2 of the Sunny Island
inverter. For a multicluster system, connect the generator directly to the Multicluster Box (see the Multicluster
Box documentation).
Requirements:
☐ A separate cable must be laid for each Sunny Island from the AC distribution board or directly from the generator.
☐ In single-phase parallel single cluster systems, the cable lengths and conductor cross-sections from each Sunny Island
to the AC distribution board or directly to the generator must be configured in the same way.
☐ In a three-phase system, L1 must be assigned to the master, L2 to slave 1, and L3 to slave 2.
Procedure:
• Connect the power cable to the AC2 Gen/Grid terminal on the
Sunny Island. Connect the neutral conductor to terminal N and
ensure that the cable is correctly connected (see Section 7.5.2
"Connecting the AC Power Cable", page 52).
7.4.6 Inserting Filler Plugs
• Seal unused enclosure openings of the Sunny Island with filler plugs. The enclosure openings will then comply with
degree of protection IP54.
7.4.7 Communication Connection
7.4.7.1 Connecting the Sunny Remote Control
A data cable is included with the Sunny Remote Control for connection purposes. If the data cable is not long enough,
you can replace it with a longer data cable.
Cable requirements:
☐ Cable length: maximum 20 m
☐ Classification: CAT5e
☐ Type of plug: RJ45
:$51,1*
Danger to life from electric shock due to incorrect connection of the neutral conductor
Connecting the neutral conductor incorrectly can cause failure of the protective functions in the system. This can result
in death or serious injury.
• Connect the neutral conductor to terminal AC2 Gen/Grid N.