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Section 6: Electrical System
Battery Isolation Manager
Your motor home is equipped with a Battery Isolation Manager (BIM) that monitors the
battery voltage of both the chassis and house batteries over long periods of time. If it senses
a charging voltage it connects the two batteries together. If the charge system is overbur-
dened, it isolates both batteries. When batteries have reached a float charge state for (1)
hour, the batteries are isolated to prevent overcharging. It will reconnect if either battery
drops to approximately 80% charge and the other is being charged. If batteries are not being
charged they will be isolated to prevent an electrical draw in one system from depleting the
other battery.
The "Battery Boost" switch is a manual override of the Battery Isolation Manager. It can be
used in an emergency (when chassis or house batteries are discharged) to start the chassis
engine or the generator.
To operate, press and hold the Battery Boost start switch located on the driv-
er's left side console. While the battery boost switch is pressed, use the igni-
tion key to start the chassis engine or the generator switch to start the genera-
tor. Release the battery boost switch once the engine or generator has started.
If your chassis and house batteries are too discharged to start the engine or
generator with this method, they need to be recharged with the on-board in-
verter/charger or by connecting the motor home to shore power.
Load Center
The Load Center contains 12VDC fuses and 120VAC circuit breakers for almost all of the
electrical appliances and circuits in the RV. The 120V main breaker may be located in this
panel and will turn off all 120-volt power to the RV. Load center location, appearance and
configuration may vary by model. Refer to the diagram inside the load center for specific
fuse assignments.
Motor homes may have separate small panels for breakers and fuses. They are normally
located in close proximity to each other typically in the bed platform. The converter is
mounted separately, typically under the bed platform.
Automatic Transfer Switch (ATS)
Your motor home is equipped with an Automatic Transfer Switch with built in reverse polar-
ity protection. The ATS is microprocessor controlled and will automatically detect which
power source is being used (generator or shore power) and allow power from that connec-
tion only. You will not have to plug and unplug power to the coach if you decide to run the
generator.
If you plug into shore power, the ATS will pass power to the motor home. If the generator
is started, it will override the shore power input (called generator dominant) and supply the
RV with electrical power from the generator. When the generator is shut down, shore power
is restored.
There may be a slight flicker of the lights when the ATS changes over from one to the other,
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