Enerdrive ePRO Combi User manual

INVERTER/CHARGER OWNERS MANUAL
12V 1600VA 60AMP / 24V 1800VA 35AMP
DC to AC true sinewave inverter.
Programmable battery charger.
Automatic transfer switch

Enerdrive ePRO COMBI Owners ManualPage 2
For safe and optimum performance, the Enerdrive ePRO Combi 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, Enerdrive assumes
no responsibility 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 Enerdrive ePRO Combi. 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
Range Model Part Number
ePRO Combi Inverter/Charger 12V 1600VA 60AMP
24V 1800VA 35AMP
5016300
5016320
ePRO Battery Charger 12V 40AMP
12V 60AMP
24V 20AMP
24V 30AMP
5026200
5026400
5026220
5026420
Accessories Universal Remote Control Panel
Link to USB Kit for Custom
Programming by a Computer
5095500
5092120
DOCUMENT PART NUMBER
ePRO Combi Rev 1
SERVICE CONTACT INFORMATION
ENERDRIVE PTY LTD
Unit 11, 1029 Manly Road Tingalpa, Queensland, Australia 4173
Ph: 1300 851 535 Fax: [phone]
Email: [e-mail]
www.enerdrive.com.au

Page 3Enerdrive ePRO COMBI Owners Manual
TABLE OF CONTENTS
1. INTRODUCTION__________________________________________________________4
2. DESCRIPTION____________________________________________________________6
3. CONFIGURING THE ENERDRIVE ePRO COMBI __________________________________7
3.1 General ____________________________________________________________ 7
3.2 Factory default parameter settings______________________________________ 7
3.3 DIP switch settings overview__________________________________________ 10
4. GENERAL OPERATION____________________________________________________ 12
4.1 Operating the Enerdrive ePRO Combi __________________________________ 12
4.2 Enerdrive ePRO Combi LED indicators and error modes ____________________ 12
4.2.1. Error indications ___________________________________________________ 13
4.3 Alarm relay ________________________________________________________ 14
4.4 Trigger input _______________________________________________________ 14
4.5 Load requirements in inverter mode ___________________________________ 14
5. CHARGER OPERATION ___________________________________________________ 15
5.1 Charge programs ___________________________________________________ 15
5.2 Equalizing a flooded battery __________________________________________ 16
6. TROUBLESHOOTING GUIDELINE ___________________________________________ 18
7. TECHNICAL SPECIFICATIONS ______________________________________________ 21
8. WARRANTY CONDITIONS_________________________________________________22
9. NOTES ________________________________________________________________23

Enerdrive ePRO COMBI Owners ManualPage 4
1. INTRODUCTION
Thank you for purchasing the Enerdrive ePRO Combi inverter/charger combination. Please read this owner’s
manual for information about using the product correctly and safely. Keep this owner’s manual and all other
included documentation close to the product for future reference. At the time of this writing, Enerdrive cannot
guarantee that all mentioned features in this manual are actually available in your ePRO Combi. Nor can
Enerdrive guarantee that all features are mentioned in this manual. For the most recent manual revision, please
check the downloads section on our website.
The purpose of this owner’s manual is to provide explanations and procedures for operating, and configuring
the ePRO Combi. For installing the ePRO Combi, a separate installation guide is included. The installation
guide is intended for installers that should have knowledge and experience in installing electrical equipment,
knowledge of the applicable installation codes, and awareness of the hazards involved in performing electrical
work and how to reduce those hazards.
IMPORTANT SAFETY INFORMATION
This section contains important safety information for the Enerdrive ePRO Combi. Each time, before using
the Enerdrive ePRO Combi, READ ALL instructions and cautionary markings on or provided with the inverter,
and all appropriate sections of this guide. The Enerdrive ePRO Combi contains no user serviceable parts. See
Warranty section for how to handle product issues.
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 precautions 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: FIRE AND/OR CHEMICAL BURN HAZARD
Do not cover or obstruct any air vent openings and/or install in a zero-clearance compartment.

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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 Enerdrive ePRO Combi in the vicinity of flammable fumes or gases (such as gas bottles 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.
LIMITATIONS OF USE
Do not use in connection with life support systems or other medical equipment or devices.

Enerdrive ePRO COMBI Owners ManualPage 6
2. DESCRIPTION
The Enerdrive ePRO Combi is an all-in-one combination of a DC to AC true sinewave inverter, an advanced
multi-stage battery charger and a high speed AC transfer switch. All this is build into one compact, yet installer
friendly enclosure. Besides these three main functions, there are several unique features offered as well. Some
of which benefit from the strong interaction between the three main functions.
The main task of the ePRO Combi is to act as an uninterruptible AC power supply (UPS). In case of a grid/
generator failure or disconnection, the ePRO Combi immediately stops charging the battery, releases the
AC transfer switch and activates the inverter which takes over the supply to the connected loads. All this is
achieved so fast, that even very critical loads like computers will continue to operate without any problems. In
case the grid/generator is reconnected again and the voltage and frequency are within acceptable limits, the
ePRO Combi activates the AC transfer switch and battery charger again, while deactivating the inverter. The
connected loads are now supplied again by the grid/generator without any interruption.
Additionally, the ePRO Combi offers features like :
• AC Input Power Boost, which temporarily assists weak AC input sources when the connected load needs
more power than available from the grid or generator.
• AC Input Current Limit, which limits the maximum current consumed from the AC input source by the
ePRO Combi. This limit is user adjustable.
• Power Factor Corrected AC Input, which optimizes energy efficiency and makes sure that the maximum
amount of charging current is available from your AC source.
• Intelligent 4-stage charge programs, user programmable to fit any battery type.
• Fully programmable inverter, transfer switch and battery charger parameters, using the Dashboard for
Windows software.
• Programmable alarm relay, for optimal control of external devices like generator starting or selective
load disconnection.
• Freely assignable trigger input, which allows the user to control the ePRO Combi by external events.
• Temperature controlled fans, to guarantee silent operation under less than full load conditions.
• Temperature compensated battery charging, using the standard supplied battery temperature sensor
for maximum battery lifetimes.

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3. CONFIGURING THE ENERDRIVE ePRO COMBI
3.1 GENERAL
The ePRO Combi can be configured in two ways. Using the DIP switches located in the connection bay, a
small selection of basic settings can be made. In most cases this will be sufficient to quickly setup the unit for
typical applications. Another option is to setup the ePRO Combi using the Dashboard for Windows software.
This software is included in the optional ePROLink to USB Communication Kit (part.# 5092120), which also
contains an isolated interface box required to connect the ePRO Combi to a PC. Using Dashboard, all available
parameters can be edited, and it is also possible to edit or create your own battery charge programs.
CAUTION
When configuring the ePRO Combi by Dashboard, make sure that DIP switch 1 is set to ON (External). When
set to ON, all remaining DIP switch settings (2 up to 7) are ignored and the ePRO Combi will always load the
parameter settings as configured in Dashboard.
When DIP switch 1 is set to OFF (Local) again, DIP switch 2 up to 7 are overriding the corresponding parameter
settings previously made in Dashboard. The parameters that cannot be configured by DIP switches, shall
return to the factory default settings.
This manual will only describe the DIP switch settings and all relevant factory default parameters. Configuration
by Dashboard will be explained in the Dashboard manual that comes with the ePROLink to USB Communication
Kit.
3.2 FACTORY DEFAULT PARAMETER SETTINGS
The table below shows an overview of the most relevant factory parameter settings, as stored in the ePRO
Combi. These settings are based on an average application. Enerdrive cannot guarantee that these are correct
for your specific application. Please check all parameters carefully, especially the battery charging voltages.
Parameter Inverter frequency
Value 50Hz
Description Output frequency in inverter mode. Can be set to 50Hz or 60Hz
Configurable by DIP switch (DIP 2) and Dashboard
Parameter Inverter voltage
Value 230V
Description Output voltage in inverter mode. Can be set from 200V to 240V
Configurable by Dashboard
Parameter Low Battery Protect
Value On
Description Enables or disables low battery protection with user programmable shutdown,
restart and delay values (standard respectively 10V, 12V and 5 seconds). Turning
Low Battery Protect off, results in immediate inverter shutdown when the battery
voltage is less than 8.0V.
Configurable by DIP switch (DIP 3) and Dashboard

Enerdrive ePRO COMBI Owners ManualPage 8
Parameter Automatic Stand By (ASB)
Value Off
Description Enables or disables ASB. If enabled, the inverter will jump to ASB mode
automatically, when the connected load power consumption drops below a
user programmable level. In ASB mode the inverter pulses it’s output sinewave
in order to detect when the connected load requires more power again. While
running in ASB mode, the ePRO Combi itself draws significantly less current from
the battery. As soon as the load power demand increases again, the inverter will
automatically jump to continuous mode delivering uninterrupted power to the
load. When disabled, the inverter will always run in continuous mode, which is
better for critical loads like computers, clocks and AV equipment.
Configurable by DIP switch (DIP 4) and Dashboard
Parameter AC input voltage range (transfer switch)
Value 180V – 270V
Description Input voltage range which is accepted by the ePRO Combi for feeding through
to the connected load. Two AC undervoltage values can be set. An absolute
undervoltage level which directly releases the AC transfer switch when exceeded
(factory setting = 150V), and a delayed undervoltage level, which releases the AC
transfer switch after a certain delay (factory settings are 180V and 5 seconds). The
charger stops charging when the AC input voltage drops below 185V and restarts
again above 190V.
Configurable by Dashboard
Parameter AC input frequency range
Value 45Hz – 65Hz
Description Input frequency range which is accepted by the ePRO Combi. Can be set to full
range (45Hz – 65Hz), or to a smaller range within the 45Hz lower and 65Hz upper
boundaries.
Configurable by Dashboard
Parameter AC Input Current Limit
Value 16.0A
Description Represents the maximum continuous current that the ePRO Combi will draw from
the AC input source. To assure this, the ePRO Combi will either reduce the charge
current automatically, or (when enabled) will activate the AC Input Power Boost
feature which will supply the additional power demand by running the inverter in
parallel with the AC input source. When the connected load still draws too much
current, the installer can either choose to deactivate the AC transfer switch, or
keep it closed and allow it to exceed the AC input current limit value. This value
can be set from 1.0A to 16.0A by Dashboard or the optional Universal Remote
Control.
Configurable by Dashboard and Universal Remote Control

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Parameter AC Input Power Boost
Value Off
Description AC Input Power Boost temporarily assists weak AC input sources when the
connected load needs more power than available from the grid or generator.
This is accomplished by running the inverter in parallel with the AC input source.
The inverter can add power up to it’s nominal output power rating assuming the
battery is healthy. This parameter can be set On or Off.
Configurable by DIP switch (DIP 7) and Dashboard
Parameter Ground switch
Value Enabled
Description The ground switch is an internal relay that automatically connects AC output
Neutral (N) to Protective Earth (PE = chassis) in inverter mode. This enables the
use of a ground fault circuit interrupter (GFCI) at the AC output of the ePRO
Combi. When a non-grounded (floating-) output is required, this Parameter can
be disabled.
Configurable by Dashboard
Parameter AC input fail sensitivity
Value Normal
Description This parameter can be set to Very Low, Low, Normal, High and Very High. The
value of this Parameter decides how fast the ePRO Combi detects a signal fail
at the AC input. The lower settings are resulting in a slower AC input source g
inverter transfer time, while the higher settings result in the fastest transfer times.
The settings Low and Very Low can be used when the AC input signal is distorted
or unstable, which could be the case when a small generator is used. The settings
High and Very High can be used when the ePRO Combi is connected to a solid grid
or quality generator. The factory setting Normal is a good compromise, which still
results in a fast AC input source ginverter transfer time of less than 5ms, while
being reasonably immune against distorted AC input signals.
Configurable by Dashboard
Parameter Battery type / Charge program
Value AGM
Description The default charge program AGM is compatible with typical AGM type batteries,
but can be used for other types of lead-acid batteries as well. Please make sure
that you always check if the ePRO Combi charge program settings, are compatible
with the used battery! The AGM charge program absorption voltage is 14.3V
(28.6V@24V) and the float voltage is 13.3V (26.6V@24V). Other selectable charge
programs are Flooded, GEL and Custom. For further charge program information,
please see chapters 3.3 and 5.1.
Configurable by DIP switch (DIP 5 and 6) and Dashboard

Enerdrive ePRO COMBI Owners ManualPage 10
Parameter Charge current limit
Value 100%
Description This parameter sets the maximum charge current in percent. 100% equals 60A
for the 12V 1600VA 60AMP and 30A for the 24V 1800VA 30AMP. This value can be
set from 10% to 100% by Dashboard or the optional Universal Remote Control.
You can set this parameter to a lower value when the connected battery is too
small and cannot handle the maximum charge current, or when you wish to
(temporarily) reduce the charger current share, in the total amount of current
flowing through the AC input of the ePRO Combi.
Configurable by Dashboard and Universal Remote Control
3.3 DIP SWITCH SETTINGS OVERVIEW
During step 3 of the installation guide, you can alter the factory settings of the DIP switches to change the
functionality of the ePRO Combi on a few points. For additional information about the settings, see the
previous chapter (3.2). The following settings can be made :
on
1
12345678
Setting description
on
1
Factory setting = OFF
Local / External Programming
ON (External) DIP switches 2 to 7 are ignored and the ePRO Combi
will always load the parameter settings as configured
in Dashboard.
OFF (Local) The local DIP switch settings are used. All other
parameters are set to the factory default settings.
on
2
Factory setting = OFF
Inverter output frequency
ON: Output frequency is 60Hz
OFF: Output frequency is 50Hz
on
3
Factory setting = ON
Low battery protect
ON: Low battery protect is on
OFF: Low battery protect is off (immediate inverter shutdown
when the battery voltage is < 8.0V)

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on
4
Factory setting = OFF
ASB mode
ON: ASB mode on
OFF: ASB mode off
on
5 6
Factory setting 5 = OFF
Factory setting 6 = ON
Battery type / Charge program1)
5 = OFF : Battery type = Flooded
6 = OFF : Absorption voltage = 14.4V or 28.8V
Float voltage = 13.5V or 27.0V
5 = ON : Battery type = GEL
6 = OFF : Absorption voltage = 14.2V or 28.4V
Float voltage = 13.5V or 27.0V
5 = OFF : Battery type = AGM
6 = ON : Absorption voltage = 14.3V or 28.6V
Float voltage = 13.3V or 26.6V
5 = ON : Battery type = Custom (created by Dashboard)
6 = ON : Absorption voltage = set by Dashboard
Float voltage = set by Dashboard
on
7
Factory setting = OFF
AC Input Power Boost
ON : AC Input Power Boost on
OFF : AC Input Power Boost off
on
8
Factory setting = ON
Bypass remote switch (Bypasses the remote switch connection when
no remote switch is connected)
ON : Remote switch connection terminals are bypassed
OFF : Remote switch connection terminals are open. A remote
switch must be connected and switched ON in order to
activate the ePRO Combi. The local on/off switch on the front
panel always overrides the remote switch. So in order to use
the remote switch, the local on/off switch must be in the ‘on’
or ‘charger only’ position.
CAUTION
1) Invalid battery type settings can cause serious damage to your batteries and/or connected battery loads.
Always consult your battery’s documentation for the correct charge voltage settings.

Enerdrive ePRO COMBI Owners ManualPage 12
4. GENERAL OPERATION
4.1 OPERATING THE ePRO COMBI
The main switch on the ePRO Combi has three positions : On, Off and Charger only (see image in chapter 4.2).
When switched to On, the ePRO Combi will perform all tasks automatically. It will power up in inverter mode,
supplying power to the connected load. When a grid or generator is connected to the AC input, the ePRO
Combi will analyse this signal. If the voltage and frequency of this signal are both within the required limits,
the ePRO Combi will synchronize to the input signal and activates the AC transfer switch automatically. Now
the connected loads are being powered from the AC input source and the ePRO Combi will also start charging
the battery. As soon as the voltage or the frequency of the AC input signal are exceeding the required limits
(for example when the AC input signal disappears), the ePRO Combi will immediately stop charging, release
the AC transfer switch and activate the inverter again. All this happens so fast, that the connected load will not
be disturbed.
When switched to Off, the ePRO Combi is completely shut down and cannot be activated by a remote switch
or the Universal Remote Control either. In this mode, the ePRO Combi will draw no current from the battery.
When switched to Charger only, the ePRO Combi will disable the inverter mode and will only work as a stand
alone battery charger. As soon as a usable AC input signal is available, the ePRO Combi will activate the AC
transfer switch and starts charging the battery. When the AC input signal fails, the AC transfer switch will be
released again and the charger stops charging. No AC signal will be present at the ePRO Combi output when
there is no AC input signal either.
Information about the LED indicators on the front panel and the different error mode codes, can be found in
the next chapter.
4.2 ePRO COMBI LED INDICATORS AND ERROR MODES
Please see the next image for an overview of all LED indicators on the ePRO Combi front panel, as well as the
location of the main switch.
The front panel can be divided into four sections :

Page 13Enerdrive ePRO COMBI Owners Manual
1. Dual function level bar. Indicates the percentage of delivered output power in inverter mode (turns red if
more than nominal output power is being delivered to the load). In charger mode, this level bar indicates the
percentage of delivered charging current.
2. Mode indicators. Indicate the operating mode of the ePRO Combi, as well as the status of each different
mode (see explanation below) :
‘charger on’ LED
Off :not charging
On (green) :charging
On (blinking red) : error (see chapter 4.2.1)
On (red) :charger disabled
‘inverter on’ LED
Off :not inverting
On (green) :inverting or power boosting
On (blinking red) : error (see chapter 4.2.1)
On (red) : inverter disabled
‘AC in’ LED
Off : No AC input present, transfer switch open
On (blinking
green)
: AC input present and within range, ePRO Combi is
synchronizing
On (green) : AC input approved, transfer switch closed
On (blinking red) : AC input present but out of range
On (red) : AC transfer switch disabled
3. Charge status bar. Gives a rough indication of the charging progress, see below :
LED 3a : 100% full (ready)
LED 3b : 80% full
LED 3c : 50% full
LED 3d : empty
4. Power on, off, charger only switch. See chapter 4.1 for more explanations.
4.2.1. ERROR INDICATIONS
When the mode indicator LEDs are blinking red, an error has been detected. Each mode indicator LED can
either blink red individually, or combined along with one or more other mode indicator LEDs. There are five
different error indications, each with their own blinking pattern :
One flash in a row : Battery related error (too low or too high battery voltage, too low or too high
battery temperature, too high battery ripple voltage, battery defect)
Two flashes in a row : AC overload error (AC load requires too much power from the inverter, AC output
short circuit)
Three flashes in a row : High temperature error (ePRO Combi shuts down on high temperature)

Enerdrive ePRO COMBI Owners ManualPage 14
Four flashes in a row : Device error (an error has occurred inside the ePRO Combi. Please return for
service)
Five flashes in a row : Charge program error (only for ‘charger on’ indicator LED). Charge program
selection set to Custom, while custom made charge program contains an error
or time-out.
The ePRO Combi will mostly recover from an error mode automatically when the cause of the error has been
resolved. However, when an error has occurred due to a high battery ripple voltage or an AC transfer switch
overcurrent, a manual reset of the ePRO Combi will be necessary. The ePRO Combi also needs to be reset
manually, when too many battery or overload errors have occurred within a short period of time.
4.3 ALARM RELAY
The ePRO Combi is equipped with a potential free alarm relay. Standard, this relay will be activated when the
unit shuts down and jumps to an error mode. The alarm relay de-activates again when the error has been
resolved and the ePRO Combi is running in normal operating mode again.
Using Dashboard, it is also possible to configure the alarm relay to perform a different task, like starting a
generator when the battery voltage has reached a certain low voltage level.
On pins 1, 2 and 3 of the 7 pins screw terminal located in the connection compartment, both normally closed
and normally open contacts are available. Please make sure not to exceed the maximum relay contact rating of
30V/1A or 60V/0.5A, in order to avoid damaging the relay.
4.4 TRIGGER INPUT
The trigger input offers a way of externally controlling the behaviour of the ePRO Combi. The trigger input can
be connected to an external switch or a potential free relay contact. Closing this external switch or contact,
a user programmable ‘action’ will be performed. Such an action could be to release the AC transfer switch,
temporarily disable the AC input Power Boost feature or force the ePRO Combi to switch to inverter mode. All
this can be configured in Dashboard.
4.5 LOAD REQUIREMENTS IN INVERTER MODE
Before you connect your appliance(s) to the ePRO Combi AC output, always check it’s maximum power
consumption. Do not connect appliances to the AC output requiring more than the nominal power rating
of the inverter continuously. Unless these appliances are switched on only when the AC transfer switch is
activated, and power is drawn from an external source with a larger capacity than the inverter.
Some appliances like motors or pumps, draw large inrush currents at startup. It is possible that the startup
current exceeds the overcurrent trip level of the inverter. In this case the output voltage will shortly decrease
to limit the output current of the inverter. If the overcurrent trip level is continuously exceeded, the inverter will
shut down and automatically restart within 20 seconds. In this case it is advisable to disconnect this appliance
from the inverter, since it requires to much power to be driven by this unit. The ePRO Combi needs to be
restarted manually when it has shut down due to overloads for four times in a row. Note that at higher ambient
temperature levels, the overload capacity of the ePRO Combi will be reduced.

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5. CHARGER OPERATION
5.1 CHARGE PROGRAMS
All standard selectable charge programs (using DIP switches 5 and 6), perform a four stage IUoUoP charging
process comprising of a “Bulk”, an “Absorption”, a “Float” and a “Pulse” stage. The image below visualizes the
four stage charging process :
In the Bulk stage, the charger delivers full output current and typically returns approximately 80% of charge
back into the battery once the absorption voltage is reached. During this stage, the battery empty and battery
50% full indicators will be lit depending on the Bulk charge progress. When the absorption voltage has been
reached, the Absorption stage will be entered and the battery 80% full indicator will be lit. This stage will return
the final 20% of charge to the battery. The output voltage is kept at a constant level and the charge current
decreases as a function of the battery’s state of charge. When the charge current has dropped below a certain
value or when the maximum absorption timer has been expired, the Float stage will be entered. The battery
full Indicator will be lit and an acoustical message will sound, indicating that the battery is full. In this stage

Enerdrive ePRO COMBI Owners ManualPage 16
the battery voltage will be held constant at a safe level for the battery. It will maintain the battery in optimal
condition for as long as the battery remains connected to the activated charger. Connected battery loads
will be directly powered by the charger up to the charger’s maximum output current level. When even more
current is drawn, the battery must supply this which results in a declining battery voltage. At a certain battery
voltage level, the charger jumps back to the Bulk stage and will finalize a complete charging process again,
once the battery load consumption has dropped below the charger’s maximum output current level.
The fourth stage called “Pulse”, will perform a short refresh charge of approximately 1 hour each 7 days while
the charger operates in the Float stage. This will keep the battery in optimal condition while prolonging it’s
lifetime. The battery can remain connected to the activated charger continuously, without risk of overcharging.
When the battery temperature sensor is installed, the charger automatically compensates the charge voltages
against battery temperature. This means that the charge voltages are slightly increased at lower temperatures
and decreased at higher temperatures (-30mV/°C at 12V chargers and -60mV/°C at 24V chargers). This way,
overcharging is prevented which prolongs your battery’s lifetime.
When the standard selectable charging programs do not satisfy your requirements, or when different voltage-
and current levels are needed, you can edit or create your own charge programs using ePRO Dashboard. Up to
8 different stages can be linked together and all individual stages can be configured extensively.
5.2 EQUALIZING A FLOODED BATTERY
If you are using a flooded lead acid battery, an occasional equalization charge cycle may be recommended by
the manufacturer. This might also be true when the flooded battery has been very deeply discharged or often
charged inadequately. During equalization, the battery will be charged up to 15.5V (or 31V for 24V models) at
a reduced output current level. Before starting an equalization charge cycle, the following caution statements
must be read carefully :
CAUTION
Equalization should only be performed on a flooded (wet) lead acid battery. Therefore the ePRO Combi only
allows equalization when the battery type DIP switches are set to Flooded. Other battery types like GEL or
AGM will be damaged by this process.
Always follow the battery manufacturer’s instructions when equalizing flooded batteries.
During equalization, the battery generates explosive gasses. Follow all the battery safety precautions
enclosed with your ePRO Combi. Ventilate the area around the battery sufficiently and ensure that there are
no sources of flames or sparks in the vicinity.
Disconnect all loads connected to the battery during equalization. The voltage applied to the battery during
this process may be above safe levels for some loads.
The ePRO Combi cannot automatically determine when to stop the equalization of a battery. The user must
monitor the battery’s specific gravity throughout this process to determine the end of the equalization
cycle. The internal 2 hours time-out timer of your charger is only intended as a safety feature, but may not be
sufficiently short to prevent battery damage. Therefore, equalizing a battery is always a process that must
continuously be supervised by the user.

Page 17Enerdrive ePRO COMBI Owners Manual
Since equalization is only allowed for flooded (wet-) lead acid batteries, the ePRO Combi will only allow this
function to be available when the “Flooded” charging program is selected (see chapter 3.3). Besides this, the
charger also needs to have a full charge cycle completed and must operate in the Float stage. When these two
conditions are met, the equalization charge mode can be activated by pressing the recessed push button on the
bottom side of the unit (see image below) for 3 seconds, until all charge status indicators start flashing.
The ePRO Combi will allow a maximum equalization time of 2 hours before it automatically jumps back to the
Float stage. If the specific gravity of each cell does not match the battery manufacturer’s specifications yet, you
can initiate a new 2 hours equalization cycle by pressing the push button for 3 seconds again. Always keep on
checking the specific gravity of each cell repeatedly during the equalization process. When these values are
correct, you can manually exit the equalization process by pressing the recessed push button once. The ePRO
Combi will then return to the Float stage.

Enerdrive ePRO COMBI Owners ManualPage 18
6. TROUBLESHOOTING GUIDELINE
Please see the table below if you experience any problems with the ePRO Combi and/or the installation.
Problem Possible cause Remedy
ePRO Combi is not working
at all.
Main switch in Off (0)
position.
Push the power switch in the ‘I’ or ‘II’
position.
Remote switch or Universal
Remote Control have
deactivated the ePRO Combi.
Activate the ePRO Combi remotely or
check DIP switch 8 for correct setting.
Poor contact between the
ePRO Combi battery wires
and the battery terminals.
Clean battery terminals or ePRO Combi
wire contacts. Tighten battery terminal
screws.
Blown DC fuse. Check battery fuse or internal ePRO Combi
fuse.
Very poor battery condition. Replace battery.
The charger mode is not
working (AC transfer switch
does not activate either).
The AC input voltage or
frequency are out of range or
too unstable.
Make sure that the AC input voltage is
between 185V - 270V and the frequency
between 45Hz – 65Hz (assuming standard
settings)
Charger mode and/or the
AC transfer switch are
disabled during setup using
Dashboard.
Enable Charger mode and the AC transfer
switch using Dashboard.
The battery is not being
charged up to it’s maximum
capacity.
Incorrect absorption charge
voltage setting.
Check DIP switch 5 and 6 for correct
settings. Or adjust the absorption voltage
using ePRO Dashboard.
Incorrect charge current
setting.
Adjust the charge current using the
Universal Remote Control or ePRO
Dashboard. Typically, the charge current
should be set to 10%-20% of the total
battery capacity
Too much voltage loss
in battery cables and/or
connections.
Make sure that the battery cables have
a large enough diameter. Check if all DC
connections are solidly made.
Additional battery loads are
consuming too much current
during charging.
Turn-off or disconnect all battery loads.
Charge current is too low. High ambient temperature. Try to lower the ambient temperature
around the ePRO Combi.
Charger is operating in the
absorption charging stage.
Do nothing. The battery is almost fully
charged and consumes less current by
itself.

Page 19Enerdrive ePRO COMBI Owners Manual
Mode indicator LEDs ‘inverter
on’, ‘charger on’ and ‘AC in’
are blinking red once per
second (battery error).
Battery voltage is too low (<
8V@12V or <16V@24V).
Battery is damaged, replace it. Or battery
has been discharged too extremely, let it
slowly recover to above 8.5V so that the
transfer switch and charger can startup to
recharge the battery.
Battery voltage is too high
(>16.5V or >33V@24V).
Check the DC system for an external
source that pushes the battery voltage
too high.
Too high ripple voltage on
DC input. (manual reset
needed)
Check battery wire connections. Decrease
battery cable length. Increase battery size.
Make sure that no other equipment on the
same battery is generating a high ripple
voltage.
Only mode indicator LED
‘inverter on’ blinks red once
per second.
Battery voltage is too low
(<10V@12V or <20V@24V).
Apply mains voltage to the AC input and
start charging the battery.
When another turn off voltage is desired
in ‘Battery protect On’ mode, please use
Dashboard
Only mode indicator LED
‘inverter on’ blinks red twice
per second.
Inverter is overloaded. Make sure that the total power rating
of the AC output load is lower than the
nominal inverter power rating.
Connected AC output load
causes a short circuit.
Make sure that the AC output load is not
defective. Check if the AC output wiring
and connections are not creating a short
circuit.
Connected AC output load
causes a too large inrush
current.
Try to power-up connected equipment
successively, and not simultaneously.
Otherwise stop using the connected
load, it’s not suitable to power it with this
inverter.
Mode indicator LEDs ‘inverter
on’ and ‘charger on’ are
blinking red three times per
second.
The ePRO Combi has shut
down due to a too high
temperature.
Reduce the AC output load in inverter
mode.
Try to reduce the ambient temperature
around the ePRO Combi. Make sure
that there is a clearance of at least 10cm
around the unit.
Do not obstruct the airflow, place no items
on or over the unit.
Keep the ePRO Combi away from direct
sunlight or heat producing equipment.
Mode indicator LED ‘AC in’
blinks red once per second.
AC input signal is present but
not within required voltage
and frequency borders.
Make sure that the AC input voltage falls
within 185V- 270V and 45Hz-65Hz.

Enerdrive ePRO COMBI Owners ManualPage 20
All mode indicator LEDs
‘inverter on’, ‘charger on’ and
‘AC in’ are blinking red twice
per second (manual reset
needed)
Maximum AC transfer switch
current has been exceeded.
Reduce the AC output load
Mode indicator LED ‘inverter
on’ or ‘charger on’ or ‘AC in’ is
red continuously.
Either the inverter mode,
or the charger mode or the
AC transfer switch has been
disabled using Dashboard.
Enable again using Dashboard if required.
If only ‘inverter on’ is red
continuously.
ePRO Combi main switch is put into
‘charger only’ mode, meaning that the
inverter is disabled.
Output power bar is red
(inverter mode).
The inverter is overloaded
and will shut down after a
certain time (depending on
the amount of overload)
Reduce the AC output load
All mode indicator LEDs
‘inverter on’, ‘charger on’ and
‘AC in’ are blinking red four
times.
Device or connection fault. ePRO Combi is defective, return for
service.
External AC source is connected to the AC
output instead of the AC input.
Mode indicator LED ‘charger
on’ blinks five times.
Charge program error. User has selected an empty or invalid
charge program (‘custom’ charge program
is empty from factory).
Advanced user made charge program
contains ‘go-to error’ condition, for
example when a charge stage takes too
much time.
If none of the above remedies will help solving the problem you encounter, it’s best to contact your local
Enerdrive distributor for further help and/or possible repair of your ePRO Combi. Do not disassemble the ePRO
Combi yourselves, there are dangerously high voltages present inside and will also void your warranty.