Model 20-1050CUL/CULW AC Power Inverter System
The Vanner 20-1050CUL/CULW AC Power System combines a powerful DC to AC
inverter with an automatic battery charger/conditioner and a 30-amp AC transfer switch.
When connected to shore power (AC utility power), the vehicle’s battery is charged, then
automatically maintained in full charge condition. The shore power is automatically
connected to the system’s AC output receptacle to supply power to the AC loads. When
shore power is disconnected (vehicle underway), the automatic transfer switch connects
the AC output receptacle to the power inverter, which obtains power from the 12 volt
battery.
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The 20-1050CUL/CULW system contains a front panel LED indicator status panel and interface connector for the remote monitor/control
units. A set of remote options allows flexibility in configuring the inverter system for specific needs. The optional IFM1 Interface Module
enables the two remote status panels, system ON/OFF switch and the Inverter Lockout Interlock to be connected to the 20-
1050CUL/CULW system.
12 Volt Power Inverter
The inverter is a highly reliable electronic power conversion unit that utilizes MOSFET power semiconductors and a microprocessor
controller. It converts 12 volt DC battery power into 1050 watts of modified sine-wave 120 volt AC power. This AC output power is
precisely regulated at 120 volts +/- 5% and 60Hz +/- 0.1Hz.
Battery Charger/Conditioner
When the system is connected to shore/utility power, the battery charger/conditioner will automatically charge the battery, then keep it
fully charged. The system’s microprocessor controls the charging sequence, starting with the Bulk charge (55 amps on High setting, 15
amps on Low setting) mode. When the battery is fully charged, it switches to the ready/maintenance mode to keep the battery’s charge
“topped off”. The unit is designed to charge either lead acid flooded (wet) or gel type batteries.
Automatic AC Transfer Switch
The 20-1050CUL system is provided with a 2.75 ft. AC power line cord. When connected to shore/utility power, the internal transfer
switch routes the incoming 120 volt AC power to the AC output receptacle and to the input of the battery charger/conditioner. In this
mode, loads connected to the AC output receptacle are supplied with shore/utility power and the battery charger/conditioner will
automatically charge and maintain the battery. When the shore/utility power is disconnected, the 120Vac output receptacle is switched
from shore power to the power inverter. If the inverter switch is ON, the power inverter immediately (within 30 ms) supplies AC power to
the AC output receptacle.
Model 20-1050CULW
The difference between a hardwire unit (20-1050CULW) and a non-hardwire unit (20-1050CUL) is in
the 120Vac input wiring to the Automatic AC Transfer Switch. The actual function of the Transfer
Relay system in the 20-1050CULW is identical to that of the 20-1050CUL; however, on the 20-
1050CULW system, the AC input is hardwired through a wiring box located at the back side of the
unit. The purpose of the wiring box is to allow the system installer to supply a 20-30 amp (instead of
15 amp) shore power input to the 20-1050CULW.
On both the 20-1050CUL and 20-1050CULW the battery charger in the Low setting uses approximately 3.5 amps of AC power to
charge the batteries at the 15 amp rate. The battery charger on the High setting uses 12 amps of AC power to supply 55 amps of DC
charging. NOTE: The battery capacity needs to be 220 amp-hours or more when charging at 55 amps DC.
Hardwiring the AC Input
There are situations where AC loads such as medical equipment or quartz lights (which usually operate from the inverter power during vehicle
operation) need to operate from shore power while the charger is operating. In situations such as this, the system installer can use the model
20-1050CULW with a hardwire input to set up the system to supply 20 or 30 amp shore line power to the inverter unit.
When shore power is supplied to the 20-1050CULW, the inverter is protected in the following ways: 1) The shore power input passes through
the unit’s transfer relays and into two circuit breakers; 2) One breaker is 15 amps to protect the AC output receptacle. The other circuit
breaker is 15 amps to protect the battery charger AC input circuit.
(37 Seiten)
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