Thor Motor Coach CLASS B, Owner'S Manual

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E L E C T R I C A L S Y S T E M
C U S T O M E R C A R E | 8 7 7 . 8 5 5 . 2 8 6 7
Illustration of Mastervolt control panel in the battery monitor mode
If you are in a parked motorhome with the vehicle’s
engine running, there is a potential for exhaust fumes
entering the motorhome.
Avoid inhaling exhaust gases as they contain carbon
monoxide, which is a toxic gas that is colorless and
odorless.
Before engaging the auto-start charging system,
ensure the vehicle is parked in an open area and that
the vehicle’s exhaust system is free of obstructions.
Do not engage auto-start charging if the vehicle is
parked in an enclosed building or confined space.
Test the CO/LP detector and ensure it is operational.
WARNING WARNING
Battery charging is augmented by the on-board solar panel
and solar charge controller. Solar charging is available when-
ever the solar controller is ON, independent of the system’s
inverter/charger or vehicle’s alternator.
Stop Charge Event
When the battery gets too close to the allowed operating speci-
fications, the Stop Charge event forces the MasterVolt charger
to switch to the float stage, in which a lower charge voltage is
used (or switch off in case of parallel connection). The event
will be active for 10 minutes.
Refer to the manufacturer’s information provided in your
Owner’s Packet, for safety, operational, charging, and main-
tenance details. System information is also available through
the TMC Owners Resource:
800 Ah System Operation
The 800 Ah battery system’s operation is the same as the 400Ah
system, except for the addition of a second battery pack and
a second safety relay. Both systems use the same MasterVolt
controller described in the previous section.
Your familiarity and use of the system and the electrical devic-
es of your motorhome will be the best gauge of how long your
battery power system will last before requiring a recharge.
Using the on-board solar charger whenever possible will add
power back to the batteries, prolonging system use.
NOTE: The electrical load of an air conditioner can be
significant. When not connected to shore power, turn
off the AC while away from your motorhome for an
extended period of time. This will significantly prolong
battery life between charges.
Auto-Start Control Button, located left of the steering wheel
Battery Charging While the Vehicle is in Motion
Whenever the vehicle’s engine is operating, battery charging
for all lithium battery systems is being accomplished by the
addition of a high-output alternator, specifically designed to
charge the lithium batteries while the vehicle is in motion.
Charging energy is regulated by the inverter/charger so that
excessive battery heat and potential over-charging is pre-
vented. Select lithium power systems use the vehicle’s engine
and this additional alternator as an auto-charging system,
described in the following section.
Auto-Charging Via the Vehicle’s Engine
(Not available on Sprinter-based motorhomes)
The system includes an auto-start module (not available with
Sprinter-based Class B motorhomes) that when enabled,
monitors the Li-ion battery’s state-of-charge. When the state-
of-charge falls below a pre-programmed set-point, the module
will auto-start the vehicle’s engine, providing charging to the
battery pack(s). While engine is running the module continues
to monitor the battery’s state-of-charge, and when it reaches a
pre-programmed level; the module will auto-stop the engine.