SMA SI 4548-US - Manual (Page 47)

SMA America, LLC 6 Electrical Connection
Operating Manual SI4548-6048-US-BE-en-20 47
Installing the DC Connection
1. Pull the positive DC cable through the conduit from the distribution board into the enclosure of
the Sunny Island.
2. Pull the negative DC cable through the conduit from the distribution board into the enclosure of
the Sunny Island.
3. Remove the coating.
4. Strip the DC cable insulation.
5. Insert the negative DC conductor in the "DC–" terminal and tighten the fastening screw with a
torque of 21 ft-lb (28 Nm). Use an Allen key (8 mm).
6. Insert the positive DC conductor in the "DC+" terminal and tighten the fastening screw with a
torque of 21 ft-lb (28 Nm). Use an Allen key (8 mm).
DC connection area
The areas between the stripped conductor and the connection area must be clean. This ensures
that the transition resistance and the heating of the terminal points is reduced.
The Sunny Island has a DC terminal for a maximum of 3/0 AWG for DC+, DC− and grounding
conductor.
DC cable
Do not connect any other devices to the DC cables. Other devices must be connected directly
to the battery via separate cables.