SMA Solar Technology AG Electrical Connection
Technical Description SI5048-TEN093630 31
The DC grounding conductors must be connected to the connection labeled "Ground". The grounding
cable is installed in five steps:
1. Loosen the cable screw connection on the Sunny Island.
2. Thread the grounding conductor through the cable screw connection.
3. Remove the protective insulation from the conductor and fit a suitable ring cable lug to the
exposed end of the conductor.
4. Install the cable screw connection with the M20 adapter piece (included in delivery) at the third
cable feed-through from the right.
– Introduce the cable screw connection with the thread in the cable feed-through.
– Screw the counter-nut onto the cable screw connection thread on the inside of the housing
and tighten.
5. Attach the conductor with the ring cable lug to the ground connection terminal and tighten the
screw with a torque of 4 to 5.7 Nm.
6.2 DC connection
NOTICE!
Function impairment of devices on the DC side.
The Sunny Island is NOT suitable for use with DC supply grids.
Function impairment can occur on devices installed on the DC side of a Sunny Island with
cables exceeding 30 meters and with a flexible connection.
• Only use fixed installations.
• Do not use cables of lengths greater than 30 meters between the Sunny Island and
the battery and/or DC device.
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