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- Convert 12V battery power to AC power
- Sinewave output ideal for running 
  demanding motorloads, sensitive electronics 
  and battery rechargeble devices
- Multistage charger ensures batteries 
  are recharged safety and efficiently
- Runs small microwave ovens, computers, 
  televisions, powertools and more
- Detachable remote on/off display 
  can be mounted anywhere
- Ideal for boats, trucks and caravan

 1000W-40A

2000W-55A

USER’S MANUAL

Supreme Combi

Inverter Charger

For safe and optimum performance, the WhisperPower Inverter-
Charger must be used properly. Carefully read and follow all in-
structions 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, 

WhisperPower BV

 assumes no re-

sponsibility for errors or omissions. Note as well that specifications 
and product functionality may change without notice.

Important 

Please be sure to read and save the entire manual before using 
your 

WP-BC Surpreme 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 Numbers:

61121040 WP-Supreme Combi 1000-40
61122055 WP-Supreme Combi 2000-55

Service Contact Information

Email: [email protected]
Phone : +31 (0) 512 571 555
Web : www.whisperpower.com

TABLE OF CONTENTS

1. Introduction 
2. Product description 
3. Installation 
4. Unit operation 
5. Troubleshooting 
6. Specifications 
7. Warranty 

1. INTRODUCTION

Thank you for purchasing the WhisperPower Inverter-Charger. 
With our state of the art, easy to use design, this product will offer 
you reliable service by providing AC power and 5V USB power 
for your home, cabin, boat, RV or Trailer using battery power and 
recharge your battery automatically when utility AC is available. 
The Sinewave Inverter-Charger can run many AC-powered ap-
pliances when you need AC power anywhere. The 5V USB power 
can charge many USB-powered devices. The multi-stage battery 
charger will charge different type of batteries.
This manual will explain how to use this unit safely and effectively. 
Please read and follow these instructions and precautions care-
fully.

Important safety information

This section contains important safety information for the Sin-
ewave Inverter-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 Sinewave Inverter-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.

-  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 specific precau-

tions when installing, using and servicing the battery connected 
to the inverter. 

-  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 fire near the system.

-  Keep unit away from moist or damp areas.
-  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: Shock Hazard. Keep away from children!
Avoid moisture. Never expose unit to snow, water 
etc. Unit provides 230 Vac, treat the AC output 
socket the same as regular wall AC sockets at home.
WARNING: Explosion hazard!
DO NOT use the unit in the vicinity of flammable 
fumes or gases (such as propane tanks or large 
engines). AVOID covering the ventilation openings. 
Always operate unit in an open area. Prolonged 
contact to high heat or freezing temperatures will 
decrease the working life of the unit. 

CE EMC information 

This equipment has been tested and found to comply with the 
limits for CE EMC standard. 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 medi-
cal equipment or devices. 

2. PRODUCT DESCRIPTION

The Sinewave Inverter-Charger includes the items list below. 
-  Inverter-Charger base unit (one of the following models) 
  1000W Unit: Sinewave Inverter 1000W with 40A charger
  2000W Unit: Sinewave Inverter 2000W with 55A charger
-  Owner’s manual

3. INSTALLATION

WARNING: It is recommended that all wiring be done 
by a certified 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 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.

Understanding the unit features

AC Output Front Panel

DC Input Rear Panel

Preparing for Installation

Typical Wiring block diagram of the Power Inverter:

12V Battery Bank:

-  The use of deep cycle battery is highly recommended for power 

inverter application

-  For battery size, you need to identify what you wish to operate, 

and for how long. It is recommended that you purchase as 
much battery capacity as possible. See more on Battery Run 
time and Load in Section 4.

Fuse or Circuit Breaker:  

-  DC-rated fuse or DC-rated circuit breaker connected along the 

DC positive line is required.

-  For 1000W Unit, select a fuse or circuit breaker 
  with a minimum of 150 Adc
-  For 2000W Unit, select a fuse or circuit breaker 
  with a minimum of 300 Adc
-  Based on the size of your 12V Battery Bank, determine the 

overall short circuit current rating of the battery bank from the 
battery manufacturer. The fuse or circuit breaker chosen has to 
be able to withstand the short circuit current that may be gener-
ated by the battery bank

Disconnect Switch:

-  Select a DC Disconnect Switch with the same or higher rating of 

the selected fuse or circuit breaker.

-  The DC Disconnect Switch is used to disconnect the DC power 

between the unit and the battery bank during service, mainte-
nance or trouble shooting.

DC Input Cable Size:

-  Use of low resistance wire is required for all the DC connections 

between the unit and the battery bank.

-  For 1000W Unit, use minimum #2 AWG wire with maximum 

cable length of 5 feet.

-  For 2000W Unit, use minimum #2/0 AWG wire with maximum 

cable length of 5 feet.

Grounding Cable Size:

Important: 

The unit is grounded through the ground stud of the 

unit located near the DC Input terminal and the chassis of the unit 
has to be grounded properly before use.
-  For Marine application, the DC grounding cable size may be one 

size smaller than the minimum size conductor required for the 
DC current carrying conductors and the conductor is no smaller 
than #10AWG. 

-  For Recreational Vehicle application, the unit has to be grounded 

to the vehicle chassis with a minimum #8 AWG copper conductor.

 AC Input Source and Branch Breaker:

-  Standard AC Input wire is required for all the AC connections 

between the AC source & the AC Input port, and the AC Output 
ports to load. 

-  A 16A branch circuit breaker is required to connect between AC 

Input source and unit’s AC Input port. 

Important: 

Follow the electrical and or building code when you 

connect the unit to any AC source.
 

Installing the Inverter-Charger System

WARNING: Electrical Shock Hazard
The unit ‘On/Off’ switch does not disconnect the 
DC power from the battery. Use the DC Disconnect 
Switch or disconnect the DC input cables connection 
to disconnect the DC power from the battery before 
working on any circuits connected to the unit. Failure 
to follow these instructions can result in death or 
serious injury.

Installation:

-  Choose an appropriate mounting location. 
-  For indoor use, the unit can be mounted in any direction except 

with the DC Input panel facing downwards.

-  Use the mounting template below to mark the positions of the 

mounting screws.

-  Drill the 4 mounting holes and place the Inverter-Charger in 

position and fasten the unit to the mounting surface.

Chassis Grounding Connection:

DANGER: The unit chassis has to be grounded 
properly. Never operate the Inverter-Charger without 
proper grounding. Failure to do so will result in death 
or serious injury.

-  Connect the grounding cable’s ring terminal to the unit ground 

screw.

-  Connect the other side of the cable to the common grounding 

point.

DC Input Connection:

CAUTION: Reversing the DC Input terminal will 
damage the unit and it cannot be repaired. Damage 
caused by reverse polarity connection is not covered 
by the warranty. 

-  Connect one end of the negative DC input cable to the Inverter-

Charger DC negative terminal. Connect the other end of the 
negative DC input cable to the battery negative terminal.

-  Make sure the Disconnect Switch is in the OFF position.
-  Connect one end of the positive DC input cable to the Power 

Inverter DC positive terminal. Connect the other end of the posi-
tive DC input cable to one of the terminals of the Disconnect 
Switch.

-  Connect a DC input cable between the other terminal of the Dis-

connect Switch and one side of the terminal of the fuse holder.

-  Connect a DC input cable between the other terminal of the 

fuse holder and the battery positive terminal.

-  Install the selected fuse to the fuse holder.
-  Turn Disconnect Switch to ON position.

AC Input Connections:

Warning: Please double check on the location of the 
AC input port located inside the wiring compartment. 
Misconnecting to the AC output port inside the same 
compartment will blow the unit and may catch fire. 
Before making any AC Input and output connection, 
please be sure the AC Input Source is not energized 
and the DC disconnect switch is OFF.

Important:

 A 16A branch breaker (not provided) is 

required to connect between the AC source and the 
Inverter-Charger. 

-  Remove AC compartment cover by unscrewing the two screws 

located at the front of the AC compartment cover.

-  Connect the AC Input ‘H’ wire between the unit’s AC Input port 

and the branch breaker terminal.

-  Connect the AC Input ‘N’ wire between the unit’s AC Input port 

and the AC source ‘N’ terminal.

AC Output Connections:

CAUTION: Please be sure that the AC Input source 
is not energized before making any AC Input and 
Output connection and that the DC disconnect switch 
is turned OFF.

The AC Output connection has three types of configurations:
Use of the provided AC socket (Port 1) for AC load:
-  This configuration does not require AC Output installation. Plug 

in the AC load to the provided AC output socket. During the by-
pass mode, the AC output is limited to 16A. 

-  Use of the provided Hardwire AC Output terminal (Port 2).
-  Remove AC compartment cover located on the front panel of 

the unit.

-  Hardwire the AC load or any external AC socket to the AC 

Output port 2. Please verify the ‘H’ and ‘N’ connection on the 
AC Output port.

Note: 

During Battery Power Mode, all AC output is limited to 4.3A 

for 1000W model or 8.7A for 2000W model.

Remote Display Connection:

-  The Remote Display on the unit is detachable. To install the 

remote to different location, an optional 6 pin standard RJ12 
cable (not provided) is required.

-  Remove the 2 screws at the front of the Display Panel and 

remove the small RJ12 cable.

-  Install the optional RJ12 standard cable to your desired location. 

Please note polarity. 

-  Connect one end of the RJ12 cable to the unit and the other 

end of the cable to the Display Panel. Please note polarity.

Test the Inverter-Charger connection:

-  Switch DC disconnect switch to ON.
-  Switch the AC Branch circuit breaker to ON.
-  The LED on display will turn on. If AC input source is available, 

‘Status’ LED turns green. This indicates the unit is running in 
by-pass mode meaning AC output is running from the AC input 
source.

-  Disconnecting the AC input source by turning OFF the 16A branch 

breaker will change the ‘Status’ LED on the Display to amber.

-  Both AC output and 5V USB are now available. 
-  Plug in a small AC load like a 40W table lamp or small appli-

ance to the AC socket to verify AC is available. 

-  The unit is successfully installed and functioning properly.

WhisperPower BV 

Kelvinlaan 82, 9207 JB Drachten, The Netherlands, Tel: +31 (0) 512 571 550, Fax: +31 (0) 512 571 599, [email protected], www.whisperpower.com

28042014Manual Supreme Combi

AC Output 

Port 

1, 2 & USB

AC Input 

Source

Inverter-
Charger

(1000W  Unit,  

2000W Unit)

Branch

Breaker

DC 

Disconnect 

Switch

Fuse or 

Circuit 

Breaker

12V 

Battery 

Bank

+

-

AC Wiring 

Compartment:

AC Output Port 2

AC Output strain relief

AC Input strain relief

Status Indicator

Display

DC Input Terminals

Fan opening

Select 
button

AC Output Port 1

AC 

Ground

AC Input 
Port

USB Output

On/Off 
button

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