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If you run the furnace and refrigerator simultaneously, you will be using approximately
(12.0 + 3.0) 15.0 amps per hour. This does not include any 12-volt lights, water pump or any
other 12-volt component.
If the furnace and refrigerator in the above example operated constantly, a 75 amp-hour
battery would become fully discharged in 5 hours
The 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 so it is 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. 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 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).
attery Disconnect Switch (If So Equipped)
B
The Battery Disconnect switch is located in an
enclosed exterior compartment typically at the
front of the recreation vehicle. This switch shuts
off all 12VDC power to the main 12V fuse panel,
and the interior of the vehicle. When the switch
is ON, there will be green area visible along with
a "1"(one) at the top of the switch. To turn the
switch OFF, turn it counter-clockwise until you
see red area along with a "0" (zero).
attery Isolator For Your Tow Vehicle (Customer
B
Supplied)
You may want to consider the installation of a battery isolator on your tow vehicle as a
convenience feature:
It receives current from the tow vehicle alternator and controls distribution of energy to
both the RV auxiliary battery and the tow vehicle battery.
It serves as a check valve to prevent energy from being drawn from your tow vehicle
chassis battery (so you can start your tow vehicle engine).
Your dealer can assist you with the selection, purchase and installation of this aftermarket
part. than 60 watts (5 amps) of 12-volt power. To prevent short circuits do not allow metallic
foreign matter to get into the 12-volt DC outlet.
Maintenance Record
(75ah / 15a = 5h).
Battery Disconnect Switch
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