Electrical Systems
101
For accuracy, test the auxiliary battery voltage using a volt-ohm
meter. A fully charged auxiliary battery will read 12.7 volts DC
and 1.265 specific gravity at 80°F (32°C).
The auxiliary battery is considered discharged at 11.8 volts,
and dead at 11.65 volts. When voltage drops below those
levels, permanent damage may occur. Typically, a deep cycle
battery has an amp-hour rating of 75-100 amps.
If the furnace and refrigerator are operating simultaneously,
approximately (12.0 + 3.0) 15.0 amps per hour are used. This
does not include any 12-volt lights, water pump or any other
12-volt component.
In the above example, if the furnace and refrigerator
operated constantly, a 75 amp-hour battery would
become fully discharged in 5 hours (75ah /15a = 5h).
The RV’s auxiliary battery should be installed in parallel with
the battery in your tow vehicle. When the 7-way trailer plug
is connected,
both
batteries power the RV.
•
It is very important NOT to discharge your
tow vehicle battery below the level required
to start the engine.
To prevent this from occurring, disconnect the 7-way trailer
plug or install a
Battery Isolator
(customer supplied). When
the tow vehicle engine is operating with the RV connected,
the tow vehicle charging system will charge both batteries.
Replacement and maintenance
Some equipment in your RV will draw small amounts of current
even when turned OFF. To prevent the auxiliary battery from
being discharged when your RV is not connected to shore line
power, disconnect the auxiliary battery negative cable at the
battery. During storage, it is important to check the voltage
monthly and recharge the auxiliary battery as needed. If you
remove the auxiliary battery from your RV, store it in a dry,
cool area per the manufacturer’s instructions.
When it is time to replace the auxiliary battery, replace it with
a Group 24 or Group 27 deep cycle battery only. Contact the
battery manufacturer for further information. DO NOT reverse
the positive and negative battery cables (doing so will blow the
reverse polarity fuse(s) that protect the converter).
Summary of Contents for Reflection Fifth Wheel 150 Series
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