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City-Car - 15/16 - Ausgabe 12/15 - 2616861 - BUE-0090-00EN
Electrical system
8
8.2
Terms
Off-load voltage
The off-load voltage is the voltage of the battery in idle condition, i.e. no current
is consumed and the battery is not being charged.
Closed circuit current
Some electrical appliances, such as the clock and the indicator lamps, require
continuous electric current, for this reason they are referred to as inactive
appliances. This closed circuit current flows even if the device has been
switched off.
Total discharge
Total discharge of the battery is imminent, if a battery is completely discharged
by an active appliance and by closed circuit current and the off-load voltage
falls below 12 V.
Capacity
Capacity refers to the amount of electricity which can be stored in a battery.
The capacity of a battery is given in ampere hours (Ah). The so-called
K20 value is normally used.
The K20 value indicates how much current a battery is able to dispense over
a time period of 20 hours without causing damage, or how much current is
required to charge a flat battery within 20 hours.
For example, if a battery can dispense 4 amps for 20 hours, then it has a
capacity of 4 A x 20 h = 80 Ah.
If more current flows, the discharging time of the battery will decrease propor-
tionately.
External influences, such as temperature and age may alter the storage
capacity of the battery. Capacity details refer to new batteries operating at
room temperature.
8.3
12 V power supply
8.3.1
Installation of inverter
The installation of a 230 V inverter results in a very high current load. For
example an inverter with a power output of 800 W on the 12 V side has a cur-
rent consumption of up to 75 A.
This current is much too big for the outputs on the transformer (see
section 8.7.1).
Z
The battery must remain idle for a while before measuring. After charging
the last time, or after the last current has been drained by appliances, wait
approximately 2 hours before measuring the off-load voltage.
Z
Total discharge damages the battery.
Z
Depending on battery technology, capacity details have a conversion factor
of 1.3 to 1.7, which lowers the real capacity by this value.
Z
Retrofitting of an inverter can lead to damage to the electrical system. We
will not be held liable for this damage.
Содержание CityCar 2016
Страница 2: ...City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Instruction manual...
Страница 6: ...Contents 6 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN...
Страница 8: ...8 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Checklist before first journey of the vehicle...
Страница 12: ...12 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Introduction 1...
Страница 30: ...30 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Before the journey 3...
Страница 42: ...42 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Pitching the motorhome 5...
Страница 66: ...66 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Gas system 7...
Страница 98: ...98 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Appliances 9...
Страница 122: ...122 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Care 11...
Страница 142: ...142 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Special equipment 15...
Страница 144: ...144 City Car 15 16 Ausgabe 12 15 2616861 BUE 0090 00EN Technical data 16...