CSV 409 A caravan charging system instruction manual
5
Issued: 20.02.2020
8050101 BA / EN
3.1 Battery functions
6-cell lead-acid or lead-gel batteries from 80 Ah upwards
Charging the caravan battery whilst driving; increasing the supply voltage
coming from the towing vehicle via the battery booster
The 12V main switch (rocker switch with neutral position on the control and
switch panel) disconnects all 12V consumers from the caravan battery
(except: the control electronics of a refrigerator).
This prevents the caravan battery from being slowly discharged by closed-
circuit current.
The batteries can still be charged using the caravan charging system, the
towing vehicle or the solar charger, even when the main battery-switch is
switched off.
The switching option provided by the battery selector switch ensures opti-
mum charging of the two different types of battery, lead-acid and lead-gel.
The consumers are switched off (except for the refrigerator) when the
caravan is hitched to the towing vehicle and the ignition is switched on
(power at terminal 10 and trailer hitch TH). The consumers can be switched
back on at any time. (The automatic disconnector does not prevent swit-
ching back on).
No closed circuit current when the ignition of the towing vehicle is switched
off; additional current consumption by the fridge’s control electronics (see
documentation supplied by the fridge manufacturer);
measured when all of the consumers inside the caravan are switched off
Caravan battery
Charging curve IUoU
Final charging voltage 14.4 V*
Charging current 28 A
Trickle charge voltage 13.7 V* with automatic switching
*Until 03/2020:
Final charging voltage 14,3 V; trickle charge voltage 13,8 V
Maximum charging current 8 A
3.2 Additional functions
This output supplies the control electronics in a fridge:
FFrom the caravan battery
FFrom the towing vehicle’s battery when the ignition is switched on
FFrom the mains supply when it is connected up
Y12V operation of the refrigerator only works if the caravan is connected to
a towing vehicle with the engine running.
Suitable batteries
Battery charging
whilst driving
12 V main switch
Battery selector switch
Automatic disconnector
Closed-circuit current
coming from towing
vehicle battery
Battery charging from
mains connection
Battery charging from
towing vehicle operation
Fridge controller
