WhisperPower Supreme WP-BC 12/100-3 User manual

12 V 100 A | WP-BC 12/100-3
Enjoy Green Energy
Battery Charger
Supreme
whisperpower.com
User Manual

2 WhisperPower Battery Charger 12 V 100 A

WhisperPower Battery Charger 12 V 100 A 3
For safe and optimum performance, the WP-BC Supreme Battery Charger must be used properly.
Carefully read and follow all instructions and guidelines in this manual and give special attention to
the CAUTION and WARNING statements.
PLEASE KEEP THIS MANUAL FOR FUTURE REFERENCE
Disclaimer
While every precaution has been taken to ensure the accuracy of the contents of this guide,
Whisper Power BV assumes no responsibility for errors or omissions. Note as well that
specications and product functionality may change without notice.
Important
Please be sure to read and save the entire manual before using your WP-BC Supreme Battery
Charger. Misuse may result in damage to the unit and/or cause harm or serious injury. Read
manual in its entirety before using the unit and save manual for future reference.
Product Number:
Article Nr. 61112310 12V 100A (WP-BC 12/100-3)
Service Contact Information
Email: [e-mail]
Phone : [phone]
Web : www.whisperpower.com

4 WhisperPower Battery Charger 12 V 100 A
TABLE OF CONTENTS
1. INTRODUCTION 5
2. PRODUCT DESCRIPTION 6
3. UNDERSTANDING THE UNIT 6
4. INSTALLING THE CHARGER 11
5. UNIT OPERATION 14
6. SPECIFICATIONS 21
7. WARRANTY 23
7. Appendix 24
Appendix A1
Appendix A2
Appendix A3
Appendix B

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1. INTRODUCTION
Thank you for purchasing the WP-BC Supreme Battery Charger. With our state of the art,
easy to use design, this product will offer you reliable service by providing a multi-stage
multi-bank battery charger to charge different types of batteries you have installed in your
boat, RV, vehicle or your cabin battery bank.
An innovative feature we offer is the ability to charge your main battery bank as rst priority
so that you may charge this main bank quickly. Another unique feature is our silent mode
setting that reduces the charging current at night, thereby reducing the fan noise.
This manual will explain how to use this unit safely and effectively. Please read and follow
these instructions and precautions carefully.
IMPORTANT SAFETY INFORMATION
This section contains important safety information for the WP-BC Supreme Battery
Charger. Each time, before using the unit, READ ALL instructions and cautionary markings
on or provided with the unit, and all appropriate sections of this guide.
The WP-BC Supreme Battery Charger contains no user-serviceable parts. See Warranty
section for how to handle product issues.
WARNING: FIRE AND/OR CHEMICAL BURN HAZARD
Do not cover or obstruct any air vent openings and/or install in a zero-clearance
compartment.
WARNING: FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN DEATH OR
SERIOUS INJURY. KEEP AWAY FROM CHILDREN!
• When working with electrical equipment or lead acid batteries, have someone nearby in
case of an emergency.
• Study and follow all the battery manufacturer’s specic precautions when installing, using
and servicing the battery connected to the charger.
• Wear eye protection and gloves.
• Avoid touching your eyes while using this unit.
• Keep fresh water and soap on hand in the event battery acid comes in contact with eyes.
If this occurs, cleanse right away with soap and water for a minimum of 15 minutes and
seek medical attention.
• Batteries produce explosive gases. DO NOT smoke or have an open spark or re near
the system.
• Keep unit away from moist or damp areas. Never expose unit to snow, water etc.
• Avoid dropping any metal tool or object on the battery. Doing so could create a spark or short
circuit which goes through the battery or another electrical tool that may create an explosion.
WARNING: Explosion hazard!
• DO NOT use the unit in the vicinity of ammable fumes or gases (such as propane tanks
or large engines).
• AVOID covering the ventilation openings. Always operate unit in an open area.
CAUTION:
• For indoor use only.
• Before charging, read the instructions.

6 WhisperPower Battery Charger 12 V 100 A
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• Do not charge non-rechargeable batteries because of the danger of eruption.
• During charging, batteries be placed in the ventilated area.
• The battery terminal not connected to the chassis has to be connected rst.
• The other connection is to be made to the chassis, remote from the battery and fuel line.
The battery charger is then to be connected to the supply mains.
• After charging, disconnect the battery charger from the supply mains. Then remove the
chassis connection and then the battery connection.
• Only allow children at least 8 years old to use the battery charger. Give sufcient instruction
so that the child is able to use the battery charger in a safe way and explain that it is not a
toy and must not be played with. Ensure a child does not try to charge non-rechargeable
batteries because of the danger of eruption.
• Examine the battery charger regularly for damage, especially the cord, plug and enclosure.
If the battery charger is damaged, it must not be used until it has been repaired.
FCC/ EMC INFORMATION
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC and to CE directive Rules. These limits are
designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generate, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.
LIMITATIONS ON USE
Do not use in connection with life support systems or other medical equipment or devices.
2. PRODUCT DESCRIPTION
The WP-BC Supreme Battery Charger includes:
• Base unit: 61112310 12V 100A Charger (WP-BC 12/100-3)
• Owner’s manual
3. UNDERSTANDING THE UNIT
The WP-BC Supreme Battery Charger is a fully automatic multistage battery charger with the
ability to charge 3 separate battery banks. When rst connected to an AC power source, the
charger will check all three battery banks before charging commences. The charger operates

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on an isolated charging design where Battery Bank 1 is separate from Battery Bank 2 and 3.
Battery Bank 1 is the priority battery bank in the charging sequence and is recommended to be
connected to the main (or primary house) battery bank. Battery Bank 1 can be programmed with
a different charge algorithm from Banks 2 and 3.
The battery Banks 2 and 3 are connected in parallel internally (with a separation diode) and
share a common charge algorithm.
During normal operation, the charger will do a full charge cycle up to the oat stage on Battery
Bank 1 with battery type set to either GEL, AGM, Flooded, Lithium (see Lithium section for
limitations of use). Once the oat stage is reached, the charger starts charging both Battery
Banks 2 and 3 with a bulk / absorption mode (Battery Banks 2 and 3 can also be set to either
GEL, AGM, Flooded). On completion, all the three battery banks move to oat stage with a
shared battery voltage determined by Battery Bank 1 settings. This setting allows the charger to
remain permanently connected to mains if required. See more details in Appendix B.
Important Note: The battery Bank 1 on the charger should only be connected to the main
battery bank for rst priority charging. Battery Banks 2 and 3 on the charger should be
connected to the other battery banks with lower priority (such as jump-start battery bank and/
or AC generator battery bank used in a marine application). On single bank installations, it is
recommended to only use Bank 1 on the charger.
Silent Mode (uses ‘Auto’ icon as indicator)
A unique feature of the WP-BC Supreme Battery Charger is the ability to reduce fan speed at
night or whenever required. This setting is manually activated via the Digital Display. Please note
that charger output current will be reduced (de-rated) to about half while in Silent Mode, leading
to longer recharge times. Please see “Understanding the Auto Mode Function” for more details.
Multi-Stage Charging Process:
The charger is a fully automatic “set-and-forget” design. It is designed to quickly and accurately
recharge deep cycle batteries utilizing charger algorithms that help to maximize the life of
specialized deep cycle batteries.
The charger features a multistage smart charging technology that enables the charger to be
connected to the battery banks permanently.
As dictated by battery manufacturer’s recommendations, deep cycle batteries require a multi-
stage charge sequence for perfect, fast and accurate charging. This charger delivers four
primary charge stages (Bulk Charge, Absorption Charge, Float, and Maintenance).
Bulk Charge ‘bUL’: The battery is charged at a full rated output current of the charger until the
battery reaches the charging voltage, known as its absorption voltage. In this
step, around 80% of the battery is recovered as fast as possible.
Absorption Charge ‘AbS’: With the charger voltage held steady, the remaining 20% is replaced
with the charger allowing the current to drop as the battery approaches its
full charge.
Float Stage ‘FLO’: Finally, in the oat stage, the charger voltage is lowered and held at a
constant and safe predetermined level. This prevents the battery from being
overcharged, yet allows the charger to supply enough current to make up for
the self-discharge losses of the battery while supporting any additional loads
connected to the battery (such as DC lighting and refrigerators). This stage
allows the charger to be used as a DC power supply.
Maintenance: This is a regular timed recharge (or return to the bulk stage). The charger
switches from oat stage to bulk charge after 7 days of constant operation to
ensure the battery banks remain active.

8 WhisperPower Battery Charger 12 V 100 A
Typical wiring block diagram of the Battery Charger with 3 batteries bank:

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AC Source:
The charger accepts full universal input voltage (90-265Vac, 47-63Hz).
Branch Breaker:
For use on 120V AC Input source, use a 15A branch breaker to connect between the AC Source and
the charger AC Input hardwire cable (Hot – black wire, Neutral – white wire, Ground – green wire).
For use on 230V AC Input source, a minimum of 8A branch breaker is required from the AC
Input Source.
Battery Bank 1, 2 & 3 Setting:
There are two sets of main settings required on the charger for battery charging:
1) Battery Bank 1, Bank 2&3 Setting - for GEL, AGM, Flooded and Program battery:
• Battery type (GEL, AGM, Flooded, Program)
• Maximum charging current (‘h-current’ in A)
• Absorption to oat stage current (‘L-current’ in A)
• Number of charging stages (Mode 2 – Bulk and Absorption stage only, Mode 3 – Bulk,
Absorption, and Float stage)
• Battery temperature (Low- ‘Lo’, Normal – ‘nor’, High – ‘hi’)
2) Battery Bank 1, Bank 2&3 Setting for Lithium battery type:
• Battery type (Lithium)
• Maximum charging current (‘h-current’ in A)
• Charge voltage (13.9 - 14.8V for 12V model and 27.8 - 29.6V for 24V model)
• Charge termination current (‘L-current’ in A)
Remote Port:
The Remote Display Port is used for connecting an optional external Remote Display (sold
separately) with identical functions to the built-in unit Digital Display.
BTS Port (Battery Temperature Sensor Port):
The Battery Temperature Sensor BTS (sold separately) is available and is used to connect to the
negative terminals of Battery Bank 1. When using on GEL, AGM, or Flooded battery, it measures
the battery temperature and will make small adjustments to the battery charging voltage for better
battery charging performance. When using on Lithium battery, it will not make any adjustment
to the battery charging voltage but it is used to terminate the battery charging process when
the battery temperature drops to below 0 C or higher than 60C and the charging process will
resume when it senses the battery temperature return to the normal operation temperature range.
As Battery Bank 1 is designed for charging the main battery bank on the system, it is highly
recommended to have the battery temperature sensor connected to Battery Bank 1. No setting is
required for the temperature sensor; it is recognized automatically when it is plugged into the unit.
• If the temperature sensor is not used, you can also manually set the temperature to Low
– ‘Lo’, Normal – ‘nor’, or High – ‘hi’ to reect the environmental temperature for a better
charging effect. Manufacturing default setting is set to ‘Normal’ temperature. See more
details on Understanding the Battery Temperature in Section 5.
CAUTION: RISK OF BATTERY DAMAGE. If the temperature sensor is not being used,
never set the battery temperature lower than the actual temperature. This may overcharge
and damage the battery.
• A WhisperPower Temperature Sensor (sold separately) is available and is used to attach to
one of the batteries. It measures the battery temperature and will make small adjustments
to the battery charging voltage for better battery charging performance. As Bank 1 is
designed for charging the main battery bank on the system, it is highly recommended to
have the battery temperature sensor attached to Bank 1 battery bank.

10 WhisperPower Battery Charger 12 V 100 A
Digital Display:
• ‘CH1’, ‘CH2’ and ‘CH3’ represent Battery Bank 1, 2 and 3
respectively. With ‘CH1’ turned on, the numerical value on
the display shows individual battery information like battery
voltage in ‘V’ or charging current in ‘A’. ‘CH 2’ and ‘CH 3’ will
always turn on together, the numerical value on the display
shows the total charging current in ‘A’
• ‘GEL’, ‘AGM’, ‘Flooded’, ‘Lithium’ and ‘Program’ represent
different battery types setting.
• ‘Auto’ indicates Silent Mode is activated
• ‘Mode’ only turns on during the setting of charging stage
Mode 2 - (2 stages: Bulk and Absorption stage)
Mode 3 - (3 stages: Bulk, Absorption and Float stage)
• ‘Temp’ only turns on when manually setting of battery
temperature.
Battery Charging Voltage:
Voltage default settings
Battery Type Absorption Float Equalization
GEL 14.4 V 13.7 V N.A.
AGM 14.7 V 13.6 V N.A.
Flooded 14.4 V 13.3 V 15.5 V (See Note 1)
Lithium Constant 13.9 – 14.8 V (0.1V Step, See Note 2) N.A
Program 13.8 – 14.8 V 13.0 – 13.8 V N.A
Note 1: Equalization setting can only be used on ooded battery type selection only.
See more details on the Procedure to Equalize the Flooded Battery section
Note 2: Charger will terminate charging when charging current drops below the set termination value.
Battery Bank Size Recommendation:
The battery charging current rating is based on the battery size. When charging GEL, AGM and
Flooded batteries, each battery bank should meet the minimum Ah rating as shown. If a smaller
size battery bank is used, set the current rating to a lower value to match with the battery bank
size. Normally, the maximum charger current rating is based on half the battery bank capacity.
Capacity Imax settings
Current Setting (A) 100 60 40 20 10
Minimum Battery Capacity (Ah) 200 120 80 40 20
When charging Lithium battery, consults the Lithium battery manufacturer for maximum
allowable charging current.
Power Supply
The charger can also be set to power supply mode (Program setting). With this setting, the
charger will only provide constant voltage and current to CH 1, while CH 2 & 3 (Bank 2 & 3)
are disabled. No DC voltage or current will be supplied to Ch 2 & 3 even if battery banks are
connected to the two channels. The charger will act as a constant voltage power supply with
user selected supply voltage and maximum current.

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4. INSTALLING THE CHARGER
WARNING: Whisper Power BV recommends all wiring to be done by a certied technician
or electrician to ensure adherence to the applicable electrical safety wiring
regulations and installation codes. Failure to follow these instructions can
damage the unit and could also result in personal injury or loss of life.
CAUTION: Before beginning your unit Installation, please consider the following:
• The unit should be used or stored in an indoor area away from direct
sunlight, heat, moisture or conductive contaminants.
• When placing the unit, allow a minimum of three inches of space around
the unit for optimal ventilation.
Note: The WP-BC Supreme Battery Charger is designed to be permanently mounted.
Mounting the Charger:
• Choose an appropriate mounting location.
• For installing in an indoor location, the unit can be mounted in any direction.
• For installing in boat or marine environment, the unit can be mounted horizontally and
vertically (AC and DC panel facing downwards) only.
• Use the mounting template below to mark the positions of the mounting screws.
• Drill the 4 mounting holes and place the Charger in position and fasten the unit to the
mounting surface. See mounting location as below.
Chassis Grounding Connection:
DANGER: The unit chassis has to be grounded properly. Never operate the Charger without
proper grounding. Failure to do so will result in death or serious injury. Ground
connection to the charger must comply with all local and application-specic
codes and ordinances.
• Connect the unit’s chassis ground to the common ground point through the ground stud
located near one of the unit mounting slots. See image in Section 3.
DC Output Wiring:
WARNING: The DC wiring used must be of appropriate size. An individual over-current
protection device usually within 7 inches (17.8cm) of each battery bank is
required. A DC disconnect switch is also recommended. Both devices must
be rated for DC voltage and current and be rated to withstand the short circuit
current available from the connected battery bank. Both devices must match
with the size of the DC wiring.

12 WhisperPower Battery Charger 12 V 100 A
Recommended Cable Length, Size and Required Fuse Size:
Wire Length Wire Size (AWG/mm2) - Fuse Size (A)
5’ (1.5 m) #2 / 12mm2
125A7.5’ (2.2m) #1/0 / 16mm2
10’ (3m) #2/0 / 35mm2
• Remove the DC compartment cover by removing the two screws located on the top
surface of the unit near the AC wiring compartment.
• Keep the connection between the battery and the charger as short as possible.
• Connect one end of the positive wire (red wire) to the Bank_1 of charger positive terminal
with torque 4.0 ~ 5.0 N-m (35 ~ 45 lb-in) and the other end to the over current protection
device, then the DC disconnect device. Do not over tighten as this may result in damage
to the charger.
• Connect another wire from the DC disconnect device to the battery bank.
• For systems with multi-battery banks: Follow the same instruction as on Bank_1 and
connect to Bank 2 & 3 accordingly.
• Prepare the negative wire (black wire) and connect to the negative terminal of the charger.
Connect the other end of the negative wire to all the negative terminals of the battery
bank(s).
• Place the DC Compartment cover back to the original position and secure the cover using
the two screws provided.
AC Input Wiring:
WARNING: The AC wiring must be of appropriate size, and it must be protected by
an appropriate branch breaker (not provided) connected between the AC
source and the Charger.
A three core color coded #14 AWG wire (L, N and GND) with a rated minimum of 75°C wire
mains cord and EU plug is provided with the charger.
Conrm that the strain relief at the charger inlet position is secured.
Connect AC source by plugging in to EU Schuco socket.
Optional Remote Display Connection:
(see more details in the instructions provided with the Remote Display)
For use with one charger unit:
• To install the optional Remote Display in a specic location, the 6 pin “rollover” RJ12 cable
(maximum length 25 ft.) provided with the Remote Display, is required.
• Install the rollover RJ12 cable in your desired location.
• Connect one end of the RJ12 cable to the Remote Display Port and the other end of
the cable to the COM_1 port on the Remote Display Panel. (Do not use COM_2 on the
Remote Display)
• The Remote Display is now ready for use.
• The RJ12 cable below may come with a ferrite bead at one edge. If so, we suggest
connecting that edge toward the unit.

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For use with two charger units connected in parallel (same model number only):
• When having two chargers in parallel, the total current to the batteries is the sum of the
ones supplied by each one of the chargers. You can see that total current (the sum) as a
unique reading, by using the optional Remote Display. It also synchronizes both chargers
in order to keep the same charging stage and distribute their charging currents almost
equally, so that one charger will not work more than the other one.
• When using the optional Remote Display for two units in parallel, they have to be the same
model number (i.e. two WP-BC 12/100-3 chargers or two AC2450 chargers). Therefore,
the total charging current to the battery banks is doubled.
• In this case, an additional (not provided) 6-pin “rollover” RJ12 cable (maximum length 25
ft.) is required for a total of two cables.
• Install the two rollover RJ12 cables in your desired location.
• For the rst RJ12 rollover cable, connect one end to the Remote Display Port of Charger_1
and the other end to Remote Display Panel COM_1 Port.
• For the second RJ12 rollover cable, connect one end to the Remote Display Port of
Charger_2 and the other end to Remote Display Panel COM_2 Port.
• The Remote Display is now ready for use.
Note 1: With AC Input power available, both Digital Displays will show ‘CON’ indicating
the two chargers are connected in parallel. The ‘INFO’, ‘NEXT’ and ‘SET’ push buttons on
both chargers are disabled. Use the Remote Display for charger unit setting. With no AC
Input available, pressing and holding the ‘INFO’ button on Charger_1 for at least 3 sec.
will show the battery voltage of Bank 1, 2, 3 and then follow with charger rmware revision
(e.g. “u1.0”).
Note 2: The combined chargers setting is based on the original setting on Charger_1.
To readjust the combined charger setting, it has to be done through the Remote Display.
Before connecting the batteries to the chargers, Battery Bank 1 of Charger_1 has to
connect to Battery Bank 1 of Charger_2. Battery Bank 2 of Charger_1 has to connect to
Battery Bank 2 of Charger_2 and Battery Bank 3 of Charger_1 has to connect to Battery
Bank 3 of Charger 2. The Common Ground of both chargers has to be connected together.
Damage to both chargers may occur if the above connections are not followed.
Tips: During installation or unit setting, it is recommended to pre-set the desired charger
setting on Charger_1 rst before connecting the second RJ12 cable to Charger_2, as
once Charger_2 is connected, all the three push buttons on the charger are disabled and
the display will only show ‘CON’ and the setting can only be adjusted by using the Remote
Panel.
Optional Battery Temperature Sensor (BTS) Connection:
For single charger operation:
• To install the temperature sensor, simply connect the RJ12 plug from the sensor to the
corresponding jack of the Temperature Sensor Port on the charger
• On the Temperature Sensor end, simply connect the ring terminal (lug) to the negative

14 WhisperPower Battery Charger 12 V 100 A
terminal of the chosen battery bank. As Battery Bank 1 is for the main battery bank charging,
it is highly recommended to connect the Temperature Sensor to Battery Bank 1 when in use.
For parallel charger operation (by using two units of the same model):
• Two batteries Temperature Sensors are required.
• Connect the RJ12 plug from the Temperature Sensor 1 / 2 to the corresponding
Temperature Sensor Port jack on charger 1 / 2 respectively.
• On both Temperature Sensor ends, simply connect the ring terminals (lugs) to the negative
terminal of the main battery bank.
Test the Charger Connection:
• Switch AC branch breaker switch to ON.
• The display will turn on. Pressing the ‘Info’ key will toggle the display to show the factory
default setting. The charger is now ready to use.
5. UNIT OPERATION
Understanding the Charging Mechanism
• The charger is a three-bank battery charger that is capable of charging a maximum of
three battery banks.
• The charger is designed to have Bank 1 charge the main battery bank. Always use Bank
1 rst when connected to a single battery bank.
• At start, if the charger senses Battery Bank 2 and 3 have battery connected and the
battery voltage is greater than 11V, the charger will then concentrate on fully charging
Battery Bank 1 rst until it reaches oat stage. It will then switch to charge Battery Bank
2 and 3.
Or:
• If the charger senses either Battery Bank 2 or 3 have battery connected and the battery
voltage is below 11V, it will cycle to charge Bank 1 for 15 minutes then Bank 2 and 3
together for 15 minutes. When the charger senses both Bank 2 and 3 reach 13V, it will
then concentrate on charging Bank 1 until it reaches the oat stage. After that, it will then
concentrate on recharging Bank 2 and 3 (together) to oat stage.
• Once all three banks have reached the oat stage, the charger will adjust the charging
voltage to the preset oat voltage of the battery bank 1, and all three banks will be
connected in parallel for oat stage charging. During the oat stage charging stage, each
battery bank is isolated by an internal separation diode.
• In oat stage, see the below chart for the maximum allowable current draw:
WP-BC 12/100-3
Maximum Float Current 60A
For charging GEL, AGM, Flooded batteries:
• The charger can be set to ‘Mode 2’, 2 stage charging (Bulk and Absorption stage charging
only- no oat stage) or ‘Mode 3’, 3 stage charging – (Bulk, Absorption, and Float stage
charging).
• Each battery bank can have its own maximum charging current and absorption-to-oat
mode current settings.
For charging Lithium batteries:
WARNING: FIRE HAZARD! When using the Lithium mode to set the battery Charging parameters,
please consult the battery manufacturer on all voltage and current settings. Using wrong setting to
charge the Lithium battery may overcharge and damage the battery, resulting in battery explosion

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and re.
Charging the Lithium battery requires the user to set the charger termination current. The charging
process will terminate when the charging current drops to the set termination current.
For using Program mode for charging batteries:
WARNING: FIRE HAZARD! When using the Program mode to set the battery charging
parameters, please consult the battery manufacturer on all voltage and current settings. Using a
wrong setting to charge the battery may overcharge and damage the battery, resulting in battery
explosion and re.
The following parameters can be programmed in the Program mode:
• Bulk/Absorption Voltage (13.8 – 14.8V)
• Float Voltage (13.0 – 13.8V)
• Mode 2 or Mode 3
Note: When program mode is used, the Battery Temperature Functions are disabled.
Understanding the Digital Display and the Function Keys during Normal Operation:
During normal operation, the display shows the related channel’s battery voltage, charging current,
and charging stage (‘bUL’ – Bulk stage, ‘AbS’ – Absorption stage, ‘FUL’ – Float stage) alternately.
When all channels reach oat stage, the display starts showing ‘FUL’ indicating that all the batteries
connected are fully charged.
During the equalization operation on a ooded battery, the numerical section on the display shows a
ashing ‘Eq’ indicating the equalization process is in progress and does not show the battery voltage
or the charging current.
Understanding the Digital Display Function with no AC Input:
With the unit already turned off (by disconnecting its AC-Input power) and the display completely in
blank, press and hold the ‘INFO’ key for at least 3 seconds until you see something on the display. The
display will show the voltage on each battery bank (channel) alternately (one at a time), as well as the
charger software revisions (e.g. “u1.5” or higher). If you read “0.6V” or “0.7V” it would mean that there
is not any battery connected to that battery bank terminal.
This feature is useful to know what battery banks (channels) are actually connected to the unit.
Understanding the Function Key ‘INFO’, ‘NEXT’ and ‘SET’ during Charger Setting:
‘INFO’: Press and hold the key for longer than 3 seconds to enter the charger
setting mode and show function setting. Once the new setting is done, press
‘INFO’ again to exit the charger setting mode.
‘NEXT’: Press the key once to keep or save the chosen setting and change the
display to show the next menu to continue other settings.
Note: The selected setting will quickly ash 3 times to acknowledge the setting.
‘SET’: Press the key to view other available settings or Press and hold the key for
3 seconds to activate or deactivate ‘Silent Mode’ – ‘Auto’ icon to show on display
(see more details on Page 5).
Please note: on later editions of the remote display, ‘SET’ is replaced by ‘ESC’.
Understanding the Three-Stage (Mode 3) Charging:
The Three-Stage Charging (Mode 3) has a Bulk, then Absorption, and then Float sequence. During
the Bulk stage, the battery accepts the maximum constant current from the charger. In the Absorption
stage, the battery voltage is held to constant voltage and the charging current will slowly reduce. In
Float stage, the charger continuously produces lower constant oat voltage to fully top up and maintain
the battery in a fully charged stage.

16 WhisperPower Battery Charger 12 V 100 A
The charger will automatically restart the full charging cycle if it senses any one of the battery banks is
discharged to lower than 12.5V or after seven days in oat stage to refresh the battery banks.
Understanding the Two-Stage (Mode 2) Charging:
The Two-Stage charging is similar to the Three-Stage charging except there is no oat stage after the
absorption stage. The charger will terminate the battery charging after Absorption.
The charger will automatically restart the full charging cycle if it senses any one of the battery banks
is discharged to lower than 12.5V, or after seven days since the last Absorption stage, to refresh the
battery banks.
Understanding the Battery Temperature Functions:
The optional Battery Temperature Sensor (Part Number 60201202) is highly recommended with the
charger to protect your battery and provide better charging voltage accuracy. It is recommended to be
installed on the main battery bank - Bank 1.
The sensor senses the battery temperature and will override the manual temperature setting and make
small adjustments to the charging voltage.
Battery
Temperature
Battery Charging Voltage Adjustment from 25 °C normal setting
Flooded and GEL type AGM type
< 25 °C + 0.027 V /°C + 0.021 V /°C
25 °C 0 V 0 V
> 25 °C - 0.027 V /°C - 0.021 V /°C
When the battery sensor is not in use, you can also manually set the battery temperature. There
are three manual battery temperature settings on the unit (‘Lo’, ‘nor’ and ‘hi’). See below for
voltage adjustments for temperature compensation.
Temperature
Setting
Recommended
for Battery
Temperature
Battery Type Voltage adjustment from
25°C normal setting
Low (Lo) <5°C
(41°F)
GEL, Flooded + 0.675 V
AGM + 0.525 V
Normal (nor) >5°C and <30°C
(>41°F and <86°F)
GEL, Flooded 0 V
AGM 0 V
High (HI) >30°C
(86°F)
GEL, Flooded - 0.27 V
AGM - 0.21 V
Procedure to set or view the charger setting:
Follow the procedure or sequence in Appendix A1-A3 to set or view the charger setting.
For GEL, AGM, Flooded or Program battery type:
Parameters below are required for setting:
• Battery type (GEL, AGM, Flooded or Program)
• Bulk/Absorption and Float voltage setting for Program battery type only. (Default values
14.4/13.5V)
• Maximum Current setting and Absorption to oat stage current setting (see table below)
• Charging stage (Mode 3: 3-stages, Mode 2: 2-stages)
• Battery temperature for GEL, AGM, and Flooded battery type only
The following table shows the maximum available charging current and its related available

WhisperPower Battery Charger 12 V 100 A 17
Absorption to Float stage current.
Model
Maximum
Current
Setting (CH1)
Absorption to Float
Stage Current
Setting (CH1)
Maximum
Current
Setting (CH2/3)
Absorption to Float
Stage Current
Setting (CH2/3)
WP-BC
12/100-3
* 100A * 4A / 8A / 12A 60A 3A / 6A / 12A
60A 3A / 6A / 12A 40A 2A / 4A / 8A
40A 2A / 4A / 8A 20A 1A / 2A / 4A
20A 1A / 2A / 4A 10A 0.5A/ 1.0A/ 2.0A
Note: * Recommended setting (Factory Default Setting)
For Lithium battery type:
Parameters below are required for setting:
• Charging Voltage (13.9 - 14.8V)
• Maximum Charging Current and Termination Charging Current
(current to dene when the charging process will terminate)
Model
Maximum
Current
Setting (CH1)
Absorption to Float
Stage Current
Setting (CH1)
Maximum
Current
Setting (CH2/3)
Termination
Charging Current
WP-BC
12/100-3
* 100A * 4A / 8A / 12A 60A 3A / 6A / 12A
60A 3A / 6A / 12A 40A 2A / 4A / 8A
40A 2A / 4A / 8A 20A 1A / 2A / 4A
20A 1A / 2A / 4A 10A 0.5A/ 1A/ 2A
Procedure to Equalize Flooded Battery:
DANGER: Explosion Hazard. The battery generates explosive gasses during equalization.
Follow all the battery safety precautions listed in the manual.
DANGER: Explosion Hazard and Risk of Battery damage. When using the equalization mode,
the user has to be sure the battery connected to the channel is a ooded battery type.
Equalizing a non-ooded battery may overcharge it and cause the battery to explode.
CAUTION:Risk of Battery and Equipment damage. Only a Flooded lead-acid battery can be
equalized. Consult your battery manufacturer or read the battery manual when you
try to equalize your batteries. Disconnect any DC load connected to the battery, as
during equalize mode, the charger will produce 15.5V to the batteries. You must
monitor the battery specic gravity throughout the equalization process to determine
the end of the equalizing cycle.
Before setting the equalization mode on the specic channel, please be sure the battery
connected to the specic channel is a ooded battery type. When the battery equalization process
started, the charger will automatically fully charge the selected channel rst and follows with 1

18 WhisperPower Battery Charger 12 V 100 A
hour of 15.5V equalization process. Consult or follow the instruction as provided by the battery
manufacturer on how to check the battery electrolyte level and or rell with distilled or deionized
water during the 1 hour’s equalization period. All cells should have similar electrolyte levels. If
distilled or deionized water is added, batteries must undergo a complete charge cycle.
The charger cannot determine when to terminate the equalization of the battery. A one-hour
timeout is set as a safety feature by requiring the user to continually re-activate it as necessary
after checking the batteries manually. During the equalization mode, the other two banks are
disabled.
Understanding the Silent Mode Function
The charger also comes with another unique ‘Silent’ Mode function that will change the internal
fan operation.
Mode Operation Fan Operation WP-BC 12/100-3
Normal Mode Full Speed 100 / 60 / 40 / 20 / 10 (A)
Silent ‘Auto’ Mode Low speed or Fan OFF 50 / 50 / 40 / 20 / 10 (A)
Tips: Use this function during nighttime or when a quiet environment is needed. Please also
note that the charging time will increase in this mode because the charger is not running
at maximum power (it is de-rated).
This function can switch to ON or OFF at any time during the charging period.
To set this function, press and hold ‘SET’ key for 3 seconds to execute the ‘Silent’ Mode. The
‘Auto’ icon will show on the display. To turn this function off, press and hold the ‘SET’ function for
3 seconds to turn off ‘Silent’ Mode. The ‘Auto’ icon on the display will turn off and the charger
current and the fan speed will return to normal.
Also; the charger will automatically depart from Silent Mode after 12 hours from being set.

WhisperPower Battery Charger 12 V 100 A 19
Understanding the Protection Features
Derating the Charging Current: When the charger senses the environmental temperature is
above 50°C, the maximum charger current will de-rate to 1/2 of the value (A02 warning code
will display). The charger will recover automatically back to the maximum charging current
when the environmental temperature drops to below 45°C.
Over Temperature Shutdown: When the charger senses the environmental temperature is
above 60°C, the charger will shut down. It will recover automatically when the environmental
temperature drops to below 45°C.
Battery Reverse Polarity: When a reverse polarity is connected to the battery bank, Fault Code
E03 on display will appear. In some case, the user replaceable DC fuse located near the DC
Output terminals may blow and Error code E08 will display.
AC Input Voltage Protection: The charger will shut down when it senses the AC input voltage is
outside of the operating range. A fault code will display. The charger will recover automatically
when it senses the AC input voltage has returned to the normal operation range.
Disconnecting the Battery Bank: To avoid any spark on the battery terminal, always disconnect
AC Input before removing or disconnecting the battery.
BTS Shutdown (with optional BTS in use): To avoid any battery damage especially when a
Lithium battery is used, the charging cycle will be terminated when the optional BTS senses the
battery temperature is above 60 C or below 0C.
Charging Dead Batteries
The charger is designed to charge batteries with the voltages on their terminals greater than 3Vdc.
For lower voltages, the batteries can be temporarily and partially charged using the charger’s
“Program” (“Power Supply”) setting, before returning to the proper battery type setting.
Reinitiating the charging cycle and the battery connection status manually
When all the channels in use (the ones with battery connected) are already in ‘Floating’ stage, with
the display showing “FUL”, you can reinitiate manually and immediately the charging algorithm
from the Bulk stage. To do so, you need to reset the unit by disconnecting the AC power that feeds
the charger, and then, the battery positive on CH1 as well. Wait until the display goes off, and then
reconnect both the CH1 positive and the AC-Input power.
Understanding the Error Codes
Error codes will be shown on the display when either an internal fault such as high internal
temperature or external fault like AC input voltage out of range is detected. The unit will shut
down.

20 WhisperPower Battery Charger 12 V 100 A
Code Condition Corrective Action
A01 Temperature Sensor (BTS) is defective. Check and or replace the sensor.
E01 Unit shutdown due to low AC Input
(< 85 +/- 5Vac)
Check AC input source. The unit will
automatically recover when the AC Input
voltage return to > 108 +/-5Vac
E02 Unit shutdown due to high AC Input
(>270 +/- 5Vac)
Check AC input source. The unit will
automatically recover when the AC Input
voltage returns to < 260 +/-5Vac
E03 Battery is connected backwards Check all battery connections
E04
Charger Internal temperature is too high and it has to shut
down. The unit will automatically recover when the unit
cools down.
The ventilation of the unit is blocked or the
environmental temperature is high. Reduce
charging current or improve the ventilation near
the unit.
E05 Not used.
E06
For non- Lithium Battery type setting:
High battery temperature >70 °C (158°F) is sensed by the
BTS when installed. The unit will shut down. The unit will
automatically recover when the battery temperature has
reduced to 60°C (140°F).
For Lithium battery type setting:
High battery temperature >60 °C (140°F) is sensed by the
BTS when installed. The unit will shut down. The unit will
automatically recover when the battery temperature has
reduced to 55°C (131°F).
Check the battery, charger setting, and its
environment.
E07
For non- Lithium Battery type setting:
Low battery temperature < -25°C (-13°F) is sensed by the
BTS when installed. The unit will shut down. The unit will
automatically recover when battery temperature reaches
-20°C (-4°F).
For Lithium Battery type setting:
Low battery temperature < 0°C (32°F) is sensed by the
BTS when installed. The unit will shut down. The unit will
automatically recover when battery temperature reaches
5°C (41°F).
It is not recommended to charge the battery at
low temperatures.
E08 DC Output fuses are blown. Check battery connection and replace the fuse
with the same type and rating.
E09
Unit shutdown due to high battery voltage (> 17 Vdc). The
unit will automatically recover when battery Voltage is
reduced to <16Vdc.
Check battery and charger settings. Check also
if there is any other DC supply connected to the
battery banks.