Connection
(Please consult the connection plan for your device!)
Any further connection (possibly from the connection of a former solar
controller, damaged insulation at the roof cable duct etc.) to the battery
minus (-) or to the vehicle (-) chassis might falsify the internal current
metering of the unit and is not admissible.
3a. Starter Battery „Start II“ (Optional)
(!) Only SCD 12 , SCD 25
Connect the second charging port to the vehicle’s starter battery using the
red connection cable (wire cross-section 1.5-2.5 mm². This cable may be
longer. In case of non-utilization, this terminal is left free.
If used, the output for the vehicle’s starter battery will be working with
reduced voltage and charging current rates. Thus, the valuable solar power
will be supplied to board/solar battery I being more suitable.
However, the vehicle’s starter battery will be kept in a condition, that
starting will always be possible, even in case of longer stop periods
(such as in winter).
Usually, the minus poles of the starter battery („Start II“) and of the
supply battery („BOARD I“) had already been connected by the
customer. If not, this connection must be made for charging of the
starter battery.
3b. 12 V Consumer Connection
(!) Only SCN 20 , SCN 40
This output can be used to operate small 12V consumers, such as
12V fans, car relays or refrigerators with control input D+. This
terminal must not be short circuited.
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