Connection
(Please consult the connection plan for your device!)
1. „MAIN I“ Battery (must be connected)
Only SCD 12 , SCD 25
Connect the battery connections of the controller - (minus) and + (plus)
to the 12V main battery, observing the correct polarity and the cross-
section of the cables (refer to the connection plan). Never operate the
controller without the battery „MAIN I“. If the battery is not connected, the
unit will not deliver a defined output voltage.
Only SCN 20 , SCN 40
Connect the battery outputs of the solar charge controller - (Minus) and
+ (Plus) with the 12V battery with correct polarity. Adhere to the cable
cross section requirements as outlined in the section “Connection Plan”.
All devices:
In case of wrong polarity of battery I, the internal safety fuse will be
triggered. The replacement fuse should have the same capacity, and it
should be of the same type!
Parallel charging of two or several batteries of the same voltage (12V) is
admissible. The batteries are to be „paralleled“, i. e. the „+“ connections of
the batteries have to be coupled and should be connected to the „+“
connection of the solar controller. The minus (-) connections have to be
coupled in the same way.
2. Solar Panel (must be connected)
Shade the panels to minimize sparking during connection and to avoid
damage due to potential reverse polarity.
Observe the cable cross-sections (refer to connection plan)!
If several small solar panels are used, they are connected in parallel. Partial
shading of the panels or of parts of the panels (leaves, branches, dirt etc.)
results in average higher solar power (see connection plan).
The (-) minus connection of the solar panel must exclusively be connected
to the (-) minus terminal of the solar controller!
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