Battery Isolator - Holiday Navigator 2003 Owner's Manual

Electrical Systems - Chassis
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Battery Isolator

300 Amp All Electric (Optional)
9 • 3 5 0
• Chassis battery voltage with the engine at idle, should range 13.5
to 14.2 Volts DC.
• The output of the alternator range is 13.6 to 15.4 Volts DC.
Connect a volt meter to the (B+) terminal of the alternator and
chassis ground. Idle the engine up to 1200 RPM.
• Connect a clamp-on amp-meter, if available, to the positive
battery cable to verify the battery state/rate of charge.
NOTE: Remember the alternator is not a battery charger. It is
designed to maintain proper electrical system voltage. A battery with
a low state of charge, or a dead battery, may overheat and damage
the alternator.
The battery isolator distributes the charge current of the alternator to the
house and engine batteries when the engine is running. Diodes in the isolator
allow DC current to flow in one direction only preventing a backward flow of
DC current. When the engine is off the chassis and house battery systems are
separate. There is a typical voltage drop of .09 to 1.1 Volts DC between the
input terminal and the output terminals of the isolator when the engine is
running.
Due to the increased DC current demands of the All Electric motorhome, a
larger alternator was installed. To accommodate the higher output of this
alternator, a larger capacity battery isolator was also installed
N A V I G A T O R 2 0 0 3
200 Amp Standard
060146
060145