Main Battery Disconnect; Alternator & Battery Isolator - Holiday Navigator 2003 Owner's Manual

Located in the battery bay are two main battery
disconnect switches for the house batteries. On the
back of each disconnect switch is a 500 Amp fuse.
The pair of fuses protect against a shorted battery
cable or other over current condition. A weatherproof
fuse holder with a 20 Amp ATO fuse for the solar
panel is attached to one of the battery disconnect
switches.
CAUTION: When working on the batteries
use protective measures against short
circuits. Place an insulating material
over the batteries when working on or
near the battery area. Remove any rings
or watches. Use extreme caution when
working with hand tools. Do not allow
the tool to short circuit any battery
connection. Always mark cable routing
and location before servicing, removing
or replacing batteries.
The engine alternator is a 270 amp Leece/Neville.
The alternator is not designed to charge the house
batteries from a complete discharge to a full state of
charge. The alternator will maintain the battery charge
during travel, supplying the DC current necessary to
operate running lights or other DC loads.
Due to the increased DC current demands of the all
electric motorhome, a larger alternator is installed. To
accommodate the output of the alternator, a higher
capacity battery isolator is also installed. The 300 Amp
battery isolator allows the output of the alternator to
maintain a charge current to the house and engine
batteries when the engine is running. The battery isolator
allows DC current to flow in one direction only. Diodes
prevent a backward flow of DC current, keeping the
chassis and house battery systems separate. There is a
typical voltage loss of .09 to 1.1 Volts DC between the
input and output terminals of the isolator.
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BUSS WGS500
N A V I G A T O R 2 0 0 3
Electrical Systems - House
Main Battery
Disconnect
060122
& Battery Isolator
080242
Alternator
060146
8 • 3 3 7