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EARTHBOUND RECREATIONAL VEHICLE TRAILER OWNER'S MANUAL
WARNING
: The gases generated within a storage battery cell may be ignited by an open
flame or spark in the vicinity of the battery. Do not use a match or flame to provide light for
checking the level of the water.
During the winter the batteries should be removed from the trailer and stored in a cool, dry place, where
there is no danger of freezing. A battery that is allowed to completely lose its charge will never regain its original
power or a full charge.
When being towed, the 12-‐volt batteries in your trailer are receiving a constant charge from the car's
generator or alternator through the seven-‐way connector. Your tow vehicle’s voltage regulator controls the charge
rate. It is important to keep the seven-‐way connector clean.
Whenever possible use the automatic built in charge of the converter system for charging. The charging
circuit automatically controls the current, reducing it as the batteries increases in charge.
At service stations make certain they give your batteries a slow charge because quick charges will
drastically shorten the life of the batteries, as will allowing repeated complete discharges.
The converter/charging system is the interior low voltage electrical system that enables you to use the
interior lights, fans, pumps and 12-‐volt appliances whether operating on self-‐contained power or 120-‐volt
city power. The 12-‐volt light bulbs give off the same light as regular household bulbs, so that when
operating on self-‐contained battery power, everything works normally except the 110-‐volt convenience
outlets and 110-‐volt appliances. The converter system is designed to maintain constant output voltages
regardless of the variances that occur in city power systems.
12V POWER CIRCUITS
The current in the converter system is 12 volts direct current (12VDC) negative grounded.
Power sources that supply 12VDC current to the system are as follows:
A. Main charge line from tow vehicle
B. Trailer Batteries
C. Converter
The power sources above are all electrically connected to the 12-‐volt distribution fuse panel that distributes
current to interior branch circuits. The circuits provide power to operate all 12-‐volt DC lights, pumps,
motors and appliances.
The power converter is a solid-‐state electronic power supply and is maintenance free. It is so
self-‐sufficient and quiet that you will probably not know it is working except for the fact that your batteries
are always charged, and your 12-‐volt lights and appliances always work. If any 12-‐volt appliance fails to
operate, first check your recreational vehicles 12-‐volt distribution fuse block. If a fuse is opened or blown
replace it with the same size fuse (never install a larger use). If the fuse opens again, have an electrician or
certified RV technician locate the circuit trouble
If the power converter is not working, first confirm the RV supply or shoreline cord is plugged into a live circuit. Then
check all the 120-‐volt breakers in your RV distribution panel to make sure they are on. If the breaker is tripped, follow
the instructions to reset the breakers. If the breaker trips again, consult an electrician or certified RV technician.
CONVERTER OPERATION
The electronic power converter is designed to supply the nominal 12-‐volt filtered D.C. power for all 12 volt operated
devices encountered in RV service. Although the converter is an excellent battery charger, the converter does not
require a battery to be connected to it for proper operation.
CAUTION
: When installing a battery always observe polarity. Connecting a battery reverse
polarity will blow the power converter main fuses located on the 12 volt D.C. distribution fuse block.
