ModVans CV1 Owner’s Manual V1.1 7
With the exception of recommended water system sanitizations, the CV1 systems are relatively
maintenance free. If the popup top lift mechanism begins to squeak or shudder, apply white grease to
the lift mechanism bearings and bearing surfaces.
Major Systems
12V System
The CV1 has two 12V batteries: the chassis battery and the house battery. The chassis battery starts the
chassis engine and runs other chassis based systems such as the headlights. The house battery runs all
the RV’s non 110V camping equipment. When the RV’s engine is running, the batteries are automatically
connected so the chassis alternator can supply 12V power and charge both batteries. When the engine
is off, the batteries are disconnected so you can’t drain the chassis battery by using the RV systems.
In normal use, the standard house battery can run the CV1 RV functions for 1-2 days without being
charged while the optional high capacity battery can run the CV1 for several days. However, certain
activities such as running the furnace or the inverter
can drain the battery quickly. To help you monitor
your batteries, the CV1 includes a volt meter on the
CV1 Control Panel, showing the voltage level of the
house battery. When the volt meter reads above 13V
the battery is charging. When the volt meter reads
between 12V and 13V, the battery is fully charged.
When the battery shows below 11V, the house
battery has been depleted. To avoid damage to your house battery, you should either charge it or stop
using it when it has been depleted (showing 11V or below). Repeated discharging of the house battery
below 11V will significantly decrease its lifespan.
Automatic Charging Relay (ACR)
In normal use, the ACR will automatically connect and disconnect the chassis and house batteries to
charge the house battery when the engine is running and keep the systems separated when the engine
is off to prevent discharging the chassis battery. There are two ways to override the ACR’s automatic
functions:
1. In the Lower Control Panel, the red ACR switch allows you to force a
connection between the two systems (left position) or to force the
systems to be disconnected (right position). The normal, automatic
operation is selected by the center position.
2. The ACR has a manual override switch. To access this switch, you will
need to remove the wall paneling on the driver side, just behind the
driver’s seat. Once this paneling has been removed, you can access the
yellow ACR manual override switch at the top of the ACR. To force the
two systems to connect, turn the switch clockwise and depress the
button on top of the switch (see photos).
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