38
DC-Side Termi-
nals
Connecting alu-
minum cables
(DC)
The DC-side terminals are designed for connecting single-wire, round aluminum cables.
The following points must be taken into account when connecting aluminum cables due to
the non-conducting oxide layer of aluminum:
- The reduced rated currents for aluminum cables
- The connection requirements listed below
Reduced rated currents for aluminum cables:
Connection requirements:
Carefully clean off the oxide layer of the stripped cable end, e.g., using a knife.
After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid- and
alkali-free Vaseline.
Then immediately connect to the terminal.
Repeat the steps above whenever the cable is disconnected and then reconnected.
Polarity Reversal
of Solar Module
Strings
The inverter comes standard with 6 metal slugs in fuse holders in the connection area. The
inverter is designed so that a reverse polarity of all solar module strings will not cause any
damage to the inverter when these metal slugs are used.
DC+ DC-
Rated cross section Reduced rated current
2.5 mm² 20 A
4 mm² 27 A
6 mm² 35 A
10 mm² 48 A
16 mm² 64 A
NOTE! Take into account local specifications when configuring cable cross sec-
tions.
IMPORTANT! Do not use brushes, files or sandpaper. Aluminum particles may get stuck
and can transfer to other cables.
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