Intellitec Battery Disconnect BD0, Battery Disconnect BD2, Battery Disconnect BD1, Battery Disconnect BD3 Installation Manual
Battery Disconnect
Meet the remote battery disconnect that makes sure
a RV's batteriesare alive, welland ready forthe road.
Battery Disconnect
Battery
Disconnect
Battery Disconnect
Battery
Disconnect
is an easy-to-install system that will
allow RV owners to disconnect coach and chassis
batteries with just the touch of a switch. With
, the owner can be sure the batteries are
disconnected when his RV is not in use or being stored
off-season. It is conveniently located inside the RV, and
it's all remote.
The heart of the system is another
Intellitec invention. A latching relay, capable of carrying
heavy coach currents, draws power only when switched
on or off; yet, it requires no power to stay open or closed.
This sturdy relay is sealed againstthe environment and is
designed for thetoughest use.
Unwanted battery drain during storage, or when the RV is
not in use, is not the only customer benefit of
. Batteries are protected from overcharging
when the RV is plugged in for an extended time. Battery
Disconnect also prevents shorts or fire hazard while
working on the12 Volt electrical system.
Installation detail is straightforward, easy-to-follow, and
is simple enough that your customers can install it
themselves.
Easy Installation
(Shown on thereverse side ofthis sheet.)
If help is needed, there is a toll-free number that you can
call for assistancefrom Intellitec.
Models and Specifications
There are four Battery Disconnect models in the product
line. There is one that's right for every RV and every
customer.
Intended for remote disconnect of a single battery.
Requires a relay, 20 ft. of cable, and a monitor panel
with ON/OFF indicator.
Intended for remote disconnect of a single battery.
Requires a relay, 20 ft. of cable, a monitor panel with
ON/OFF indicator, and digitalvoltmeter.
Intended for remote disconnect of both coach and
chassis batteries of motor homes. The BD2 system
requires two relay, 25 ft. of cable, monitor panel with two
ON/OFF indicators, and ignition interlock to prevent
disconnection while engineis running.
Intended for remote disconnect of both coach and
chassis batteries of motor homes. The BD3 requires two
relays, 25 ft. of cable, and monitor panel with two
ON/OFF indicators, digital voltmeter and ignition
interlock to prevent disconnection while engine is
running.
See model choices with part numbers as
listed.
USE
STORE
BATTERY
DISCONNECT
Intellitec
READ
VOLTS
USE
STORE
BATTERY
DISCONNECT
Intellitec
COACH
CHASSIS
USE
STORE
BATTERY
DISCONNECT
Intellitec
READ
VOLTS
COACH
CHASSIS
USE
STORE
BATTERY
DISCONNECT
Intellitec
Intellitec
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
FAX 630.916.7890
P/N 53-00066-000 Rev. B 111504
www.intellitec.com
BD0 FOR COACH - NO VOLTMETER
BD1 FOR COACH - WITH VOLTMETER
QTY 1 BDO BEZEL ASSY (BRN/GLD) 01-00066-000
(BLK/SLV) 01-00066-004
QTY 1 BD RELAY, 100 AMP, 12V 01-00055-000
QTY 1 CABLE, BDO/1 20 FEET 11-00063-000
QTY 1 BD1 BEZEL ASSY (BRN/GLD) 01-00066-001
(BLK/SLV) 01-00066-005
QTY 1 BD RELAY, 100 AMP, 12V 01-00055-000
QTY 1 CABLE, BDO/1 20 FEET 11-00063-000
Battery Disconnect
SPECIFICATIONS
Relay Actuation Voltage 10.5 Volts minimum
Continuous carry current 100 Amps maximum
Short term carry current 500 Amps - 30 seconds maximum
Typical Battery Disconnect Installation
BATTERY DISCONNECT SYSTEM
BD2 FOR COACH & CHASSIS - NO VOLTMETER
BD3 FOR COACH & CHASSIS - WITH VOLTMETER
QTY 1 BD2 BEZEL ASSY (BRN/GLD) 01-00066-002
(BLK/SLV) 01-00066-006
QTY 1 BD RELAY, 100 AMP, 12V 01-00055-000
QTY 1 CABLE, BD2/3 25 FEET 11-00139-000
QTY 1 BD3 BEZEL ASSY (BRN/GLD) 01-00066-003
(BLK/SLV) 01-00066-007
QTY 1 BD RELAY, 100 AMP, 12V 01-00055-000
QTY 1 CABLE, BD2/3 25 FEET 11-00139-000
Intellitec
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
FAX 630.916.7890
P/N 53-00066-000 Rev. B 111504
www.intellitec.com
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
Battery DisconnectNOprovides a simple and safe means of remotely disconnecting batteries of an RV
or boat. With a touch of a remote switch, the batteries will be completely disconnected, preventing
unwanted drain when the RV or boat are put into storage.
The heart of the system is a unique latching relay developed specifically for this purpose. While this
relay is capable of carrying heavy currents, it requires power to stay open or closed. It only draws
power during activation. The relay is sealed against the environments and is designed to withstand
the shock and vibration experienced in the most severe RVor boat applications.
THE RELAY -
The Battery Disconnect Relay is a mechanically latching switch that operates by the momentary application
of battery voltage to the coil terminals in one direction for latching (closed) or the other direction for
unlatching (open).
To close the relay, +12 volts is applied to the “I” terminal and ground to the “S” terminal of the relay. When
this is done, the plunger is pulled into the coil and the contacts are connected. While this happens, the rod
magnet suspended above the plunger is attracted (opposite poles attract) to the top of the plunger by the
magnetic field. See FIGURE 1
When the voltage is removed from the coil, the plunger gets pushed upward by the return spring, but
cannot move because the rod magnet is in the way. See FIGURE 2
How It Works
Warning: The Battery Disconnect system connects directly to the vehicle’s positive battery terminal.
Inadvertent shorts across the battery or to ground, may cause severe damage and injury. Use
extreme caution when working with these wires. Always wear safety glasses when working with the
battery connections.
1
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
FIGURE 1
Relay Closing
Positive polarity applied to coil.
Current flowing in coil.
Plunger pulled in to coil.
Rod magnet attracted to
plunger by opposite polarity.
FIGURE 2
Relay Closed
Power removed from coil.
Magnet blocks plunger from
coming up, maintaining contact.
2
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
To open the relay, +12 volts is applied to the “S” terminal and ground on the “I” terminal. When this is
done, the plunger is again pulled into the coil. However, since the magnetic polarity of the coil is reversed,
the rod magnet is repelled (like poles oppose), and swings out of the way. See FIGURE 3
When the voltage is removed from the coil, the plunger gets pushed upwards by the return spring, breaking
the connection between the two large terminals. See FIGURE 4.
3
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
FIGURE 3
FIGURE 4
Relay Opening
Negative polarity applied to coil.
Current flowing in coil.
Plunger pulled in.
Rod magnet opposed by plunger
same polarity magnetic field,
swings out to side of housing.
Relay Open
Power removed.
No current flowing in coil.
Plunger pushed up by return spring
while magnet is off to the side.
Contacts open. Magnet comes
to rest at side of plunger.
4
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
THE SYSTEM
FUSES
A typical motor home may use one or two relays to disconnect the batteries. These relays are usually
independent and operate from a switch panel located inside the coach. A harness is used to connect from the
panel to the relays. The Intellitec/Nuvatec panelsare offeredin four models. They are:
BD0 - Single battery system, with a cableand monitor panel with an on/off indicator
BD1 - Single battery system, with a cableand monitor panel with an on/off indicator and digital voltmeter
BD2 - Dual battery system, with cable andmonitor panel with two on/off indicators and ignition interlock relay.
BD3 - Dual battery system, with cable and monitor panel with two on/off indicators, digital voltmeter, and
ignition interlock relay.
The dual relay panels include an ignition interlock relay that opens the power circuit to the chassis battery relay
when the ignition is turned on, to preventthe battery from being accidently opened when the engine is running.
A typical circuits is shown in FIGURE 5 and FIGURE 6. The switches are each double pole, double throw,
momentary, center off. Operating the switch in either direction will cause the relays to open or close,
depending on the polarity of the voltage applied.
There are two 5 Amp fuses for the system, mounted on each relay. Looking at the relay with cap at the top, the
fuse on the right feeds the LED indicator and if so equipped, the digital voltmeter. The fuse on the left feeds the
power to the switch that operates the solenoid.
Note: BD1 panel can be interchanged with BD0,and BD3 and be interchanged with BD2
5
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
Problem Possible
Cause/Solution
Relay won't engage
Relay won't disengage
Light on panel remains on although relay is off.
Light is off although relay is on
BD1 or BD3 No voltmeter reading
Check fuses on relay
Check battery voltage, must be greater than 10.5 volts.
While switch is engaged, check for voltage across the coil
terminals (+ on the ""I" terminal and ground on the "S"
terminal), If 0 volts, replace panel, if + voltage, replace
relay.
Check wiring
Check fuses on relay
Check battery voltage, must be greater than 10.5 volts
While switch is engaged, check voltage across the coil
terminals (+ on the "S" terminal and ground on the "I"
terminal) If 0 volts, replace panel, if + voltage, replace
relay.
Check wiring
Is coach plugged in, unplug coach
Is engine running, turn engine off
Check wiring
Check fuses on relay
Check wiring
Replace panel assembly
Check fuses on relay
Check wiring
Check voltage on yellow/green wire, If + voltage, replace
panel
6
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
7
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-100 Rev. B 030905
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY DISCONNECT
8
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
BATTERY DISCONNECT provides a simple and safe means of disconnecting the coach and chassis battery(s) of
an RV. With just the touch of a switch on the monitor panel conveniently located inside the RV, the battery(s) will be
completely disconnected. Since the 12 Volt battery system plays such a vital role in the use and enjoyment of your
RV, Battery Disconnect can give you peace of mind.
Through its correctuse you may:
Prevent unwanted discharging of batteries during extended periods of storage
Prevents shorts or fire hazard while storing on the 12 Volt electrical system
Prevent overcharging of batteries if RV is plugged into shore power (120 Vac) for extended periods.
BD0
BD2
BD1
BD3
1
P/N 01-00066-000 P/N 01-00066-001
P/N 01-00066-003P/N 01-00066-002
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
HOW AND WHEN TO USE BATTERY DISCONNECT
There are four Battery Disconnect models; two with asingle “STORE/USE”switch and two with a dual “STORE/USE”
switch. Single switch units control the coach or “house”batteries only. Dual switch units control the coach or “house”
batteries and thechassis or “motor”batteries.
Press the “USE/STORE” switch to the “USE” position momentarily. The indicator light for that battery will glow,
indicating the presence of 12 Volts on the system. Repeat this step for the second “STORE/USE” switch if your
unit is so equipped.
To prevent the discharge of your batteries, press the “STORE/USE” switch to the “STORE” position momentarily.
Repeat this step for the second “STORE/USE” switch, if your unit is so equipped. If no external power (shore
power or generator) is applied to the system, the indicator light(s) should be extinguished.
If you plan to leave your RV plugged into 120 Vac at your home or campsite, it is advisable to disconnect your
batteries according to the procedures described under the “TO STORE RV”. This procedure prevents
overcharging to the batteries.
If you are plugged into any 120 Vac source, the ”IN USE” indicator light may remain lighted.
It is suggested that all wires from the monitor panel be inserted or attached to the relay(s) prior to final relay
installation.
When equipped with dual Battery Disconnect controls, an interlocking feature presents disconnection of the
battery while the ignition switch is on. To disconnect Battery, be sure the ignition switch is
off. The battery can, however, be connected with the ignition switch on.
Disconnect battery(s) as described in “TO STORE RV” above to prevent accidental shorts or fire hazard when
servicing the 12 Volt system.
TO USE RV
TO STORE RV
EXTENDED PLUG-IN
NOTE:
INITIAL INSTALLATION
FOR MOTORIZED Rv’s
TO WORK ON 12 VOLT SYSTEM
(A week or more)
CHASSIS CHASSIS
CHASSIS
2
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
These instructions contain all the information needed to help you install the Battery Disconnect. It is assumed
the installer has basic skills in electrical wiring, mechanics and carpentry. If you have any doubts about these
techniques or instructions, consult with someone you connect a wire or cut a hole.
It is best to read before doing . These instructions are written for a typical travel coach,
not for any specific make or model. You should devote some thought and ingenuity to finding the best way to
accomplish each step,so that thefinished job willbe a worthy addition to the coach in which it is installed.
As you read these instructions, unpack each part and become familiar with it. Be sure that you have all the parts
and that you can identify each one.
1 Monitor Panel
1 Disconnect Relay
1 five wire cable (length marked on box)
2 5 Amp fuses
4 Phillip head screws
Installation Manual
Since this kit is for many different types of vehicles, not everything you need can be included. The parts
required are listed below and can be purchased at any RV or automotive store.
1) Crimp on battery cable lugs. Two (2) for each relay. Must fit copper studs on relay.
2) Relay Mounting bolts, 1/4"-20, length to suit with nut, flat washer and lockwasher for each. Two (2) per relay.
3) If the battery cables are too short to reach where the relays will be mounted, additional cable will be needed.
BEFORE
EVERYTHING ANYTHING
UNPACKING
BATTERY DISCONNECT FOR A ONE BATTERY SYSTEM (BD-0 OR BD-1):
ADDITIONAL PARTS
3
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
CHOOSE THE LOCATION
MARK AND CUT THE OPENING
ROUTE THE CONTROL CABLE
INSTALL THE MONITOR PANEL
IMPORTANT:
The Monitor Panel is the small lighted display which is installed in the living area of the coach. It should be visible and
reachable by occupants. One typical location is on an interior wall near the entrance door of the coach. It should be
noticeable as youenter and leave the coach to remind you to connect/disconnectthe battery(s).
Be sure there are no structural members or other obstructions at the location; there must be at least 3/4 inch of clear space
behind the panel. When selecting the location, bear in mind that a cable must be routed from this panel to the battery
compartment.
If your kitis for a one battery system (BD-0 or BD-1), use thetemplate for thesmaller panel.
.
Tape the Template for the Monitor Panel over the chosen location. Mark the centers of the four mounting holes using an
awl or punch and mark the outline of the large hole. Carefully cut out the hole along the dotted line. Cut only as deeply as
necessary, being carefulnot to cut anything which may be behind the wall suchas wiring.
The Control Cable connects the Monitor Panel to the Disconnect Relay(s) and to the vehicle ground. On BD-2/BD-3
Models it also connects to the ignition. Locate where the relays will be mounted (see Install the Battery Disconnect
Relay(s).) Make a path for the cable and put it through. Be sure the PC board (flat) connector is at the Monitor Panel cut
out. Leave a footof slack atthe panel endso that it can be plugged in and secure the cable to the inside of thewall. It is not
necessary to runthis cable inside conduit, or take other special precautions. b
Plug the Monitor Panel connector end of the Control Cable onto the Monitor Panel. Note that the connector end only fits
one way on the Monitor Panel circuit board. Arrange the Control Cable in the wall while inserting the Monitor Panel in thru
hole. Attach the Monitor Panel withfour Phillips-head woodscrews in the locations previously marked.
The outside edgeof the template should be the same size as theMonitor Panel
ecause it carriesonly low voltages.
The relay is the electro mechanical switch that actually disconnects the battery. It should be located near the battery for
wiring simplicity. When installed, the relay will be inserted "in-line" with the cable coming from the positive (+) terminal of
the battery.
.
INSTALLING THEDISCONNECT RELAY(S)
Keep this in mindwhen choosing a location.
Batteries contain sulfuric acid that can cause severe burns. Avoid contact with skin, eyes and clothing. In case of
contact, flush with large amounts of cool clean water and contact a physician. Batteries also produce explosive gases
that can cause blindness or other serious injury. Keep all sparks, flames and smoking materials away from batteries
and always shieldeyes when near batteries. Keep area well ventilated.
WARNING:
Before proceeding, disconnect all sources of power. Unplug the coach and turn off the generator.
Disconnect the battery(s) negative (-) terminal
4
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
MOUNT THE CHASSIS RELAY
While holding the relay in place near the chassis battery, mark the location of the two holes for the relay mounting bolts.
Set the relay aside, and drill two mounting holes. Before bolting the relay in place, route the Control Cable near the
mounting place, locate the two wires with the fuse connectors (orange and yellow) and insert the connectors in the relay
(see the wiring diagram on the next page). Follow the color code on the relay label using the wire colors printed in red for
the chassis. Install the5Amp fuses in the relay.
The wires connecting to the "S" and"I" terminals on the relay (purple and grey) should also be connected at this time, again
following the colorcode. The relaycan now be bolted into place.
Press the CHASSIS USE/STORE switch on the control panel to the "USE" position. The chassis indicating LED should
glow to indicate the battery is connected to the system. Turn on something connected to the chassis battery such as the
headlamps to verify the connection. Press the switch to the STORE position. The headlamps as well as the LED should
go out. Turn the headlamp switch off. Repeat with an interior light and the COACHbattery switch.
If there is another 12 Volt source on the coach other than the battery (some coaches have built in charger), the
COACH LED glow even when the battery is disconnected .
CONNECTING THE BATTERY CABLE
Locate the positive battery cable for the chassis battery and if possible route it across the relay. If it is not long enough you
will need to purchase a piece of cable of the same size and type to lengthen it. Carefully cut the cable near the relay. Strip
the cable insulation back about 1/2" on each end and crimp on the battery cable terminals. Connect the terminals to the
copper studs on the relay according to the label. It is important that the cable going to the battery be connected to the side
of the relay indicated on the label as "BATTERY" and the cable going to the electrical circuits be connected to the side
labeled "LOAD".
If your BATTERY DISCONNECT is for a two battery system repeat therelay mounting andbattery cable instructionsfor the
coach (auxiliary) battery. If the relays cannot be mounted close enough together for the Control Cable to reach, an 18
gage wire maybe spliced into the cable to lengthen it. This time use the wire colors printed on the labelin black.
Connect the black wire from the Control Cable to a good chassis ground. Connect the blue wire from the control cable to a
fused 12 Volt source that is only hot whenthe ignition ison such as the power lead for the radio.
The installation isnow complete. Reconnect the negative cable(s) to the battery(s).
You must use two wrenches to tighten the nuts on the stud, one to turn the outside nut and one to hold the nut
on the insidefrom turning. The copper stud must not turn orrelay operation maybe affected.
SYSTEM CHECK
NOTE:
may
5
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
In the event a battery cannot be connected due to any difficulty with the BATTERY DISCONNECT, simply move the
LOAD battery cable to the same relay stud as the BATTERYbattery cable andthe relay willbe out ofthe circuit.
Troubleshooting
SYMPTOM CAUSE/REMEDY
Pressing “USE/STORE” switch will not connect the
battery.
12 Volt RV power operates normally, but indicator
lights/voltmeter will not illuminate.
Battery switched to “STORE” position, but indicator
light remains on.
Gen-set will not crank.
RV engine will not crank or chassis accessories will
not operate.
Battery may be fully discharged. Recharge battery
or “jump” with direct connections.
Check fuses on LATCHING RELAYS and replace if
blown with same type and rating (5 Amp).
Check fuses on LATCHING RELAYS and replace if
blown with same type and rating (5 Amp).
RV is plugged into 120 Vac shore power or
operating on Gen-set.
Check that COACH battery is switched to “USE”.
Check that CHASSIS battery is switched to “USE”.
Relay won't connect/disconnect
Relay connectors for store and
disconnects for use
Battery voltage below 10.5Volts - recharge battery.
Control Cable connected improperly - check wiring.
Fuses on relay blown -replace
The chassis relay on Bd2 and BD3 cannot be
disconnected when the ignition is on
Wires on S and I terminals of relay are reversed check wiring.
6
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
I
S
COACH
CHASSIS
BROWN
GRAY
WHITE
PURPLE
BAT.
GREEN
I
S
COACH
CHASSIS
BROWN
GRAY
WHITE
PURPLE
BAT.
GREEN
COACH
BATTERY
CHASSIS
BATTERY
READ
VOLTS
COACH
CHASSIS
USE
STORE
BATTERY
DISCONNECT
Intellitec
TO SYSTEM
GREEN
BROWN
WHITE
ORANGE
RED
YELLOW
TO SYSTEM
GRAY
RELAY
PURPLE
GND
BLUE
TO IGNITION
SWITCH
BLACK - GND
2-1/8”
MOUNTING
HOLES
SUGGESTED WIRING DIAGRAM FOR BD2 & B 3D
(FOR BD AND B - USE COACH WIRING ONLY)D1
GND
- +
- +
7
131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00066-400 Rev. B 033004
www.Intellitecsve.com
Intellitec
INSTALLATION MANUAL
BATTERY DISCONNECT
If your BatteryDisconnect is equippedwith a Voltmeter you can determine the state of charge of yourbattery(s).
The voltage on the battery is a reliable indication of the amount of charge in the battery when the battery is “at rest”.
The best time to read the voltage is when the battery has not been charged or discharged for several hours. The
reason for thisis to allowthe internal chemistryof the battery to stabilize.
If the battery has just been charged, it should be loaded to remove the “surface charge” from the plates which would
give a higher than normal reading. This can be done for the coach battery by turning on some lights in the coach for a
few minutes, or for the chassis battery by turning on the headlights for a few minutes. After any loading, disconnect
the battery with the “STORE/USE” switch and allow at least ten minutes for the voltage to stabilize. Then reconnect
the battery with the “USE/STORE” switch, press the VOLTAGE CHECK switch and read the amount of charge from
the chart below.
A charge of 50% means that a new battery could deliver one half of its rated amp-hour capacity. Since a battery
loses its ability to store charge as it ages, a two year old battery at 50% charge would not provide as much
service as a new battery of the same amp-hour rating would at 50% charge.
Batteries should bestored at least75% charged.
Afully discharged batterycan freeze at15 degrees F.
See your RV owners manualfor battery serviceand charging information.
A properly operating charging system should read between 14 and 15 Volts when charging. When the RV is
plugged into 120 Vac (or the gen-set is running) and the COACH battery is in the “USE” position, it is being
charged. When the RV engine is running the CHASSIS battery is being charged.
HOW TO USE THE VOLTMETER-
SOME POINTS TO REMEMBER:
100
75
50
25
0
7 8 9 1 2 3 4 5 6 7
12
VOLTS - DC
(Battery temperature 60 - 1000F)
8
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