Mastervolt PowerCombi 12V/1200W-50A 120V Operating manual

PowerCombi
12V/1200W 50A 120V, 12V/2000W 100A 120V
PURE SINE WAVE INVERTER/CHARGER
USER AND INSTALLATION MANUAL
10000015114/05

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PowerCombi Inverter/Charger
TABLE OF CONTENTS
1SAFETY INSTRUCTIONS 3
1.1 General......................................... 3
1.2 Warnings regarding the use of
batteries ....................................... 4
1.3 Location........................................ 5
1.4 Connections.................................. 5
1.5 Warning regarding life support
applications.................................. 5
2GENERAL INFORMATION 6
2.1 Intended use................................. 6
2.2 Liability.......................................... 6
2.3 Warranty....................................... 6
2.4 Identification label ......................... 6
2.5 Correct disposal of this product..... 6
3PRODUCT DESCRIPTION 7
3.1 Dimensions................................... 7
3.2 Overview of AC side ..................... 7
3.3 Overview of DC side ..................... 8
3.4 Operating modes .......................... 8
3.5 Remote control.............................. 9
4INSTALLATION INSTRUCTIONS 10
4.1 Unpacking................................... 10
4.2 Location...................................... 10
4.3 Batteries...................................... 10
4.4 Wiring ......................................... 11
4.4.1 AC Safety grounding............ 11
4.4.2 AC wiring............................. 11
4.4.3 DC wiring............................. 11
4.4.4 Auxiliary DC output wiring.... 12
4.5 Things you need ......................... 12
4.6 Connection example ................... 13
4.7 Installation step-by-step.............. 13
4.8 PowerCombi Remote Panel
(optional).................................... 15
4.9 Dry contacts (optional)................ 15
5SETTINGS 16
5.1 DIP switch setting .......................16
5.2 MasterBus settings...................... 17
6OPERATING INSTRUCTIONS 18
6.1 General.......................................18
6.2 Main switch................................. 18
6.3 Status LEDs................................18
6.4 3-step charge process.................20
6.5 Protections.................................. 21
6.6 Maintenance ............................... 22
6.7 Decommissioning........................ 22
6.8 Storage and transportation..........22
7TROUBLESHOOTING 23
8TECHNICAL DATA 25
8.1 Specifications.............................. 25
8.2 De-rating Curve........................... 27

PowerCombi Inverter/Charger
3
1 SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
1.1 General
1. This manual contains important safety and operating instructions for the following models:
Model
Part number
PowerCombi 12V/1200W-50A 120V
36211200
PowerCombi 12V/2000W-100A 120V
36212000
These models are further mentioned as “PowerCombi Inverter/Charger“.
2. CAUTION –To reduce risk of injury, the PowerCombi Inverter/Charger may only be used
for charging Lead-acid type (flooded, Gel, AGM) or Mastervolt Lithium Ion rechargeable
batteries and the supply of users attached to these batteries, in permanent systems.
Other types of batteries may burst causing personal injury and damage.
3. Do not expose the PowerCombi Inverter/Charger to rain, snow, spray, moisture,
excessive pollution, aggressive environments, ammonia, salt or condensing circumstances.
4. Use of an attachment not recommended or sold by Mastervolt may result in a risk of fire,
electric shock, or injury to persons.
5. Except for making the electrical connections, the PowerCombi Inverter/Charger may not
be opened. There are no serviceable parts inside the casing. Do not disassemble the
PowerCombi Inverter/Charger; take it to a qualified serviceman when service or repair is
required. Incorrect reassembly may result in a risk of electric shock or fire.
6. To reduce risk of electric shock, disconnect the PowerCombi Inverter/Charger from both
AC and DC electrical system before attempting any maintenance or cleaning. Turning off
controls will not reduce this risk. Be sure that third parties cannot reverse the measures
taken.
7. The PowerCombi Inverter/Charger is not ignition protected. Avoid serious injury or death
from fire or explosion. Do not install in compartment containing gasoline-fueled engines or
gasoline tanks, or in areas where ignition protected equipment is required.
8. The PowerCombi Inverter/Charger is not to be used by children or persons with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction.
9. In case of fire, you must use the fire extinguisher which is appropriate for electrical
equipment.

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PowerCombi Inverter/Charger
1.2 Warnings regarding the use of batteries
1. WARNING –RISK OF EXPLOSIVE GASES
i. WORKING IN VICINITY OF A LEAD-ACID BATTERY IS DANGEROUS. BATTERIES
GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION. FOR
THIS REASON, IT IS OF UTMOST IMPORTANCE THAT EACH TIME BEFORE
SERVICING THE POWERCOMBI INVERTER/CHARGER IN THE VICINITY OF THE
BATTERY, YOU READ THIS MANUAL AND FOLLOW THE INSTRUCTIONS
EXACTLY.
ii. To reduce risk of battery explosion, follow these instructions and those published by
battery manufacturer and manufacturer of any unit you intend to use in vicinity of
battery. Review cautionary marking on these products and on engine.
2. PERSONAL PRECAUTIONS
i. Someone should be within range of your voice or close enough to come to your aid
when you work near a lead-acid battery.
ii. Have plenty of fresh water and soap nearby in case battery acid contacts skin,
clothing, or eyes.
iii. Wear complete eye protection and clothing protection. Avoid touching eyes while
working near battery.
iv. If battery acid contacts skin or clothing, wash immediately with soap and water. If acid
enters eye, immediately flood eye with running cold water for at least 10 min and get
medical attention immediately.
v. NEVER smoke or allow a spark or flame in vicinity of battery or engine.
vi. Do not short circuit battery! Be extra cautious to reduce risk of dropping a metal tool
onto battery. It might spark or short-circuit battery or other electrical part that may
cause explosion.
vii. Remove personal metal items such as rings, bracelets, necklaces, and watches when
working with a lead-acid battery. A lead-acid battery can produce a short-circuit
current high enough to weld a ring or the like to metal, causing a severe burn.
viii. NEVER charge a frozen battery.
ix. If necessary to remove battery from a vessel or vehicle, always remove grounded
terminal from battery first. Make sure all accessories in the vessels or vehicle are off,
so as not to cause an arc.
x. Be sure that the area around battery is well ventilated.
xi. Clean battery terminals. Be careful to keep corrosion from coming in contact with
eyes.
xii. Study all battery manufacturer’s specific precautions such as removing or not
removing cell caps while charging and recommended rates of charge.
xiii. Add distilled water in each cell until battery acid reaches level specified by battery
manufacturer. This helps purge excessive gas from cells. Do not overfill. For a battery
without cell caps (e.g. AGM, Gel or Li-ion batteries), carefully follow manufacturer’s
recharging instructions.
xiv. A battery is heavy! It may become a projectile if it is involved in an accident! Ensure
adequate and secure mounting and always use suitable handling equipment for
transportation.

PowerCombi Inverter/Charger
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1.3 Location
1. POWERCOMBI INVERTER/ CHARGER LOCATION
i. Locate the PowerCombi Inverter/Charger away from battery in a separate, well
ventilated compartment.
ii. Never place marine converter or inverter directly above battery; gases from battery will
corrode and damage marine converter.
iii. Never allow battery acid to drip on the PowerCombi Inverter/Charger when reading
gravity or filling battery.
iv. Do not operate the PowerCombi Inverter/Charger in a closed-in area or restrict
ventilation in any way. To reduce risk of fire hazard, do not cover or obstruct the
ventilation openings.
1.4 Connections
1. DC CONNECTION PRECAUTIONS
i. Connect and disconnect DC output connections only after setting any switches of the
PowerCombi Inverter/Charger to off position and removing AC connections or opening
AC disconnect switch.
ii. Short circuiting or reversing polarity will lead to serious damage to batteries, the
PowerCombi Inverter/Charger, wiring as well as accessories. Fuses cannot prevent
damage caused by reversed polarity and the warranty will be void.
2. EXTERNAL CONNECTIONS TO CHARGER SHALL COMPLY WITH THE UNITED
STATES COAST GUARD ELECTRICAL REGULATIONS (33CFR183, SUB PART I).
3. GROUNDING INSTRUCTIONS –The PowerCombi Inverter/Charger should be
connected to a grounded, metal, permanent wiring system; or an equipment-grounding
conductor should be run with circuit conductors and connected to equipment-grounding
terminal or lead on unit. Connections to the PowerCombi Inverter/Charger should comply
with all local codes and ordinances.
1.5 Warning regarding life support applications
Mastervolt products are not designed to be used as component of medical equipment, unless
negotiated in the form of a written agreement between customer and/or manufacturer and
Mastervolt. Such agreement will require the equipment manufacturer either to contract
additional reliability testing of the Mastervolt parts and/or to commit to undertake such testing
as a part of the manufacturing process. In addition the manufacturer must agree to indemnify
and not hold Mastervolt responsible for any claims arising from the use of the Mastervolt parts
in the life support equipment.

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PowerCombi Inverter/Charger
2 GENERAL INFORMATION
2.1 Intended use
Use the PowerCombi Inverter/Charger only observing the instructions in this user and installation
manual.
2.2 Liability
Mastervolt can accept no liability for:
•Consequential damage resulting from the use of the PowerCombi Inverter/Charger;
•Possible errors in the included manual and the consequences of these;
•Use that is inconsistent with the purpose of the product.
Disclaimer: Our products are subject to continual development and improvement. Therefore,
additions or modifications to the products may cause changes to the technical data and functional
specifications. No rights can be derived from this document. Please consult our most current Terms
& Conditions of Sale.
2.3 Warranty
Mastervolt assures the product warranty of the PowerCombi Inverter/Charger during two years after
purchase, on the condition that the product is installed and used according to the instructions in this
manual. Installation or use not according to these instructions may result in under performance,
damage or failure of the product and may void this warranty. The warranty is limited to the cost of
repair and/or replacement of the product. Costs of labor or shipping are not covered by this
warranty.
2.4 Identification label
Part and Serial number
Important information required for service or maintenance can
be derived from the identification label. The identification label
is located at the rear side of the PowerCombi Inverter/Charger.
CAUTION!
Never remove the identification label.
Figure 1: Identification label
2.5 Correct disposal of this product
This product is designed and manufactured with high quality materials and components,
which can be recycled and reused. Please be informed about the local separate collection
system for electrical and electronic products. Please act according to your local rules and
do not dispose of your old products with your normal household waste. The correct disposal of your
old product will help prevent potential negative consequences to the environment and human
health.

PowerCombi Inverter/Charger
7
3 PRODUCT DESCRIPTION
3.1 Dimensions
Figure 2: Dimensions PowerCombi in mm [inch]
3.2 Overview of AC side
A
AC Output
B
AC Input
C
Chassis ground
D
Main switch
E
DIP switches
F
Status LEDs
See section 6.3.
G
AC input breaker
Figure 3: AC side –exterior

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PowerCombi Inverter/Charger
A
AC Output terminal (L/N)
B
AC Input terminal (L/N)
C
AC Input / Output ground
terminal
Figure 4: AC side –interior
3.3 Overview of DC side
A
DC input connector
B
Auxiliary DC output Fuse (20A)
C
Auxiliary DC output
D
RJ11 Battery Temp. sensor port
(optional, 41500700)
E
Remote port (RJ11)
F
Dry contacts; Remote switch
input and Alarm output
G
Fan
Figure 5: DC side
3.4 Operating modes
•Inverter mode
When there is no external AC power available, the inverter provides AC power on the AC
outputs. If energy saving mode is enabled, battery power consumption will be reduced when
there is no (i.e. less than 20W for 10 seconds) load on AC OUT. Please note that small loads
such as wifi routers, satellite receivers or digital clocks are most likely not to work in this mode.
•Charger mode
When external AC power is available on the
AC input, the battery will be charged and the
AC output is supplied by the external power.
Negative Positive
AC
DC
AC IN AC OUT
BATTERIES

PowerCombi Inverter/Charger
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•Power sharing mode
If the available power at the AC IN is limited, and the load connected to AC OUT increases, the
external AC circuit breaker may trip if nothing is done. To avoid this, the unit can automatically
reduce the battery charger output, and thus the AC power consumption.
The Power Sharing level (adjustable from the PowerCombi Remote Panel or a laptop/notebook
connected via the MasterBus PowerCombi Interface) should be set to match the value of the
external circuit breaker, which protects AC IN.
Load on AC OUT < power sharing level
Load on AC OUT ≥ power sharing level
•Mains support mode
If the demand for AC power still increases,
the external AC circuit breaker may still trip if
nothing is done. This problem can be solved
by the Mains support mode. If the total
demand for energy exceeds the maximum
external power supply, energy can be added
to AC OUT by means of the inverter. This
means that the inverter adds energy from the
batteries, in parallel with the external power
source.
Note: Under no circumstances AC power from the inverter can be fed back into the AC grid.
Different countries have different regulations regarding AC sources operating in
parallel with the AC grid. This may mean that in some situations mains support mode is
not allowed! Familiarize yourself with local regulations on this issue.
3.5 Remote control
Mastervolt offers several possibilities for remote monitoring and control of the PowerCombi
Inverter/Charger. See www.mastervolt.com for all available options.
•PowerCombi Remote Control (77010700).
•MasterBus PowerCombi Interface (77032900); enables configuration (of voltage levels for
example) from a notebook/laptop which is obligatory if the installation comprises the Mastervolt
MLI battery.
AC
DC
AC IN
6A 4A
AC OUT
BATTERIES
2A
AC
DC
AC IN
6A 6A
AC OUT
BATTERIES
0A
AC
DC
AC IN AC OUT
BATTERIES
6A 9A
3A

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PowerCombi Inverter/Charger
4 INSTALLATION INSTRUCTIONS
During installation and commissioning of the unit, the Safety Instructions are applicable at all times.
See chapter 1 of this manual.
4.1 Unpacking
The delivery includes:
•PowerCombi Inverter/Charger
•Two cable lugs for the DC input connection
•User and installation manual and accessory labels.
After unpacking, check the contents for possible damage. Do not use the PowerCombi
Inverter/Charger if it has received a sharp blow, been dropped, or otherwise damaged in any way. If
in doubt, Contact your supplier or Mastervolt.
Check from the identification label (see section 2.4) whether the battery voltage is the same as the
nominal output voltage of the PowerCombi Inverter/Charger (e.g. 12V battery set for a 12V battery
charger). Also check that the AC output voltage and output power of the PowerCombi
Inverter/Charger complies with your system and loads.
4.2 Location
•The PowerCombi Inverter/Charger is designed for indoor use only (IP 21).
•Ambient temperature: 14 to 140°F [-10°C to 60°C], power derating above 104°F [40°C].
•Humidity max 93%, non-condensing
•The PowerCombi Inverter/Charger requires a minimum of 4" of clearance on every side to
ensure safety and proper ventilation.
•If the PowerCombi Inverter/Charger is installed in the immediate vicinity of living areas, take into
account that the fan of the PowerCombi Inverter/Charger can produce noise when operating.
•Although the PowerCombi Inverter/Charger fully complies with all applicable EMC limits, it may
still cause harmful interference to radio communication equipment. If such interference appears,
it is recommended to increase the separation between the PowerCombi Inverter/Charger and
the equipment, to relocate the receiving antenna or to connect the equipment to a circuit
different from that to which the PowerCombi Inverter/Charger is connected.
•The PowerCombi Inverter/Charger can be mounted horizontally as well as vertically (see section
4.7 on page 13).
4.3 Batteries
Model
Recommended battery capacity
Data based on Mastervolt Gel
batteries. If other batteries are used,
make sure the manufacturer's
recommendations are met.
12V/1200W-50A
120 –360 Ah
12V/2000W-100A
200 –600 Ah

PowerCombi Inverter/Charger
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4.4 Wiring
WARNING!
Make sure that all wiring is properly installed, in good condition and correctly sized to
match the current ratings of the PowerCombi Inverter/Charger. The wire sizes stated in
this manual are only guidelines. Always comply with all local rules and regulations.
4.4.1 AC Safety grounding
The ground connection (item C in Figure 3) accepts CU/AL conductors from #14 to #2 AWG (2.5 to
35 mm2).
WARNING!
For safety reasons Ground Fault Circuit Interrupters (GFCIs), also known as Residual
Current Devices (RCDs), must be integrated in the AC input and AC output of the
PowerCombi Inverter/Charger. Always comply with all local rules and regulations.
WARNING!
The ground wire offers protection only if the case of the unit is connected to the safety
ground. Connect the chassis ground terminal to the hull or the chassis of the boat or
vehicle that this PowerCombi Inverter/Charger is equipped on.
In inverter state, the AC OUT neutral (N) is automatically connected to the AC ground. In charger
state, i.e. when external AC power is available, the PowerCombi Inverter/Charger disconnects the
neutral AC from the AC ground. Refer to local regulations on these issues!
4.4.2 AC wiring
WARNING!
On first connecting to power, make sure the PowerCombi Inverter/Charger is in a well-
ventilated area as it might spark.
For a safe installation the correct wire cross section must be applied. Do not use a cross section that
is smaller than indicated. Recommended cross section for the AC wiring:
Model
AC cable cross section
12V/1200W-50A
10AWG [6mm2]
12V/2000W-100A
10AWG [6mm2]
Recommended wire colors (refer to local rules):
Wire color
Meaning
Must be connected to:
Black
Hot or Line
L
White
Neutral
N
Green
Earth
PE / GND
4.4.3 DC wiring
Keep in mind that high current will pass through the DC wiring. Keep the cable length as short as
possible, this will keep the system efficiency as high as possible.

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PowerCombi Inverter/Charger
Model
DC cable cross section < 6ft [2m]
12V/1200W-50A
1/0AWG [50mm2]
12V/2000W-100A
3/0AWG [95mm2]
Recommended wire colors (refer to local rules):
Wire color
Meaning
Connect to:
Red
Positive
+ (POS)
Black or yellow
Negative
–(NEG)
Run the cables next to each other to limit the electromagnetic field around the cables. The negative
cable should be connected directly to the negative post of the battery bank or the ground side of a
current shunt. Do not use the chassis frame as the negative conductor. The positive battery cable
must be fused and connected to the positive post of the battery bank. Use a fuse that matches the
applied wire size. The fuse with fuse-holder is available from your local Mastervolt distributor.
4.4.4 Auxiliary DC output wiring
The Auxiliary DC output can be used for charging a small second battery set like a starter battery.
When enabled, this output is active when external AC power is available on AC IN. The maximum
current is 20A. Use 10 to 12 AWG wire for the connection.
Step 1.Connect the negative of the 2nd battery to the minus of the main
battery.
Step 2.Connect the positive of the 2nd battery to the auxiliary DC OUTPUT of
the PowerCombi Inverter/Charger. Place a small screwdriver in the
rectangular opening and drive down to open up the clamp. Place the
wire in the round opening and remove the screwdriver.
Step 3.Integrate a 20A slow blow fuse in the plus cable.
The Auxiliary DC output fuse protects the 2nd battery from overcharging.
Figure 6: Auxiliary DC Ouput connector block
4.5 Things you need
Make sure you have all the parts you need to install a PowerCombi Inverter/Charger:
•PowerCombi Inverter/Charger (included).
•Optional: Battery temperature sensor with cable and plug (not included).
Note: Lithium-ion batteries require no temperature sensor as they have built-in intelligence that
monitors the internal temperature.
•DC cables to connect the PowerCombi Inverter/Charger to the batteries and common negative.
See section 4.4.3 for specifications.
•DC fuse holder with a DC fuse, to be integrated in the positive DC cable.
•Screws/bolts (Ø ¼" / 6mm) with plugs to mount the PowerCombi Inverter/Charger to a surface.
Use mounting materials which are suited to carry the weight of the PowerCombi
Inverter/Charger.
•AC cable to connect the AC input to an AC power source. See section 4.4.1 for specifications.
•Batteries. See section 4.3 for specifications.
•Appropriate and reliable cable terminals, cable lugs, battery terminals and cord end terminals.

PowerCombi Inverter/Charger
13
We recommend as a minimum tool kit:
•Socket wrench to fix the main DC cables (½” / 13mm).
•Socket wrench to fix the Safety ground connection (3/8” / 10mm).
•Flat blade screw driver to fix the screw terminals of the AC wiring.
•Tools to fix the screws / bolts (Ø ¼”/ 6mm) with plugs to mount the PowerCombi
Inverter/Charger to a surface.
•Philips screw driver to open the connection compartment.
4.6 Connection example
This schematic illustrates the general placement of the PowerCombi Inverter/Charger in a circuit. It
is not meant to provide detailed wiring instructions for any particular electrical installation.
Figure 7: Installation drawing PowerCombi Inverter/Charger
4.7 Installation step-by-step
Step 1. Disconnect power supplies.
Step 2. Mount the PowerCombi with four screws to a solid surface.
Ceiling Mount
Use the screws to mount the product on the wall, and the product mounting requirement is
as follows: the mounting height from the ground to product requires at least 28”[70cm].

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PowerCombi Inverter/Charger
Wall Mount
1. Use the screws to mount the Drip shield and the product on the wall.
2. Please make sure the height from the ground to product at least 70 cm (28”).
The bulkhead size requires at least 4" (100mm) clearance each side of the inverter.
Step 3. Connect the chassis ground terminal to the central grounding point.
Step 4. Connect the AC wiring to the screw terminals. Fasten the cables with a clip.
Step 5. Integrate a fuse holder in the positive battery wire but do not place the fuse yet!
Step 6. Fit crimp-on ring terminals (5/16" / M8) to the DC cables. Connect the DC cabling of the
battery bank; positive to +, negative to –.
70cm [28 ]
6mm [1/4 ]
100mm [4 ]100mm [4 ]

PowerCombi Inverter/Charger
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Step 7. Optional: Attach the battery temperature sensor to the casing of the battery bank. Then
plug the RJ11 temperature sensor cable into the Battery Temp. sensor port (item D in
Figure 5).
Step 8. Use a small screw driver to change DIP switch settings. See section 5.1.
Step 9. Option: connect external alarm or remote switch input. See section 4.9.
Step 10. Check all wiring. If all wiring is OK: Place the inverter fuse.
WARNING!
When the fuse is placed, internal capacitors may cause a spark. This is
normal
Step 11. Close the connection compartment and fix the screws at the bottom.
Step 12. Switch on the PowerCombi Inverter/Charger.
Step 13. Optional: Set the desired output voltage and other configuration settings from the
PowerCombi Remote Panel or laptop/notebook connected via the MasterBus PowerCombi
Interface, see chapter 5.
4.8 PowerCombi Remote Panel (optional)
Optionally the PowerCombi Remote Panel is connected to the RJ-11remote port (REMO) on the DC
input side. Before using the PowerCombi Remote Panel, make sure the main switch is in the
Remote (═) position before startup.
4.9 Dry contacts (optional)
The 6 pin terminal (item F in Figure 5) at the DC side offers two functions:
•Alarm output;
The alarm contact switches when a fault occurs.
•Remote switch
Install a switch for remote operation. Make sure the main switch is at Remote (═) position.
Alarm contact (maximum load 250VAC / 24VDC / 1A)
1
Normally Open (NO)
2
Common
3
Normally Closed (NC)
Remote control
4
Enable +(ENB)
5
Enable −(ENB)
6
Ground (GND)
(same polarity with negative battery input)
Use 20 ~ 24 #AWG [0.50 ~ 0.20 mm2] wire to connect the remote control terminals.

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PowerCombi Inverter/Charger
5 SETTINGS
Adjustment of the settings of the PowerCombi Inverter/Charger can be made in three different ways:
•By means of DIP switches.
•From the PowerCombi Remote Panel, see the PowerCombi Remote Panel user manual.
•From a laptop/notebook connected via the MasterBus PowerCombi Interface.
CAUTION!
Invalid settings of the PowerCombi Inverter/Charger can cause serious damage to your
batteries and/or the connected load! Adjustment of settings must be carried out by
authorized personnel only.
5.1 DIP switch setting
Open the connection compartment to access the DIP switches (item E in Figure 3) and use a small
screwdriver to carefully set the required settings.
WARNING!
Never open the connection compartment when the PowerCombi Inverter/Charger is
connected to a power source.
Output Voltage
S1
S2
100V
OFF
OFF
110V
ON
OFF
115V
OFF
ON
120V
ON
ON
Frequency
S3
50HZ
OFF
60HZ (default)
ON
AC Input Current Limit
S4
S5
S6
3A
OFF
OFF
OFF
6A
ON
OFF
OFF
9A
OFF
ON
OFF
12A
ON
ON
OFF
15A (default)
OFF
OFF
ON
20A
ON
OFF
ON
25A
OFF
ON
ON
30A
ON
ON
ON

PowerCombi Inverter/Charger
17
Battery Type
S7
S8
* When using a Mastervolt MLI Lithium Ion
battery, select the the Custom type and set the
voltage levels in MasterAdjust. Note that this
requires the PowerCombi Interface.
GEL
OFF
OFF
Flooded (default)
ON
OFF
AGM
OFF
ON
Custom*
ON
ON
Max. Charger Current (%)
S9
S10
See chapter 8.1 on page 25 for charge profile
voltages.
25%
OFF
OFF
50%
ON
OFF
75%
OFF
ON
100% (default)
ON
ON
Auxiliary DC output
S11
OFF (default)
OFF
ON
ON
Energy Saving mode
S12
OFF (default)
OFF
ON
ON
5.2 MasterBus settings
MasterBus is a CAN based data network for communication between Mastervolt devices. When the
PowerCombi Inverter/Charger is connected, open MasterAdjust on a Windows laptop or notebook
connected to the MasterBus network. MasterAdjust software is available as free to download
software on the Mastervolt website: www.mastervolt.com. This tool runs on a Windows laptop or
notebook connected via the MasterBus PowerCombi Interface.
How to set the values for a Mastervolt MLI battery
1. Open MasterAdjust.
2. Select the PowerCombi Inverter/Charger.
3. Go to the Configuration tab.
4. As Battery type, select Custom from the drop-down list.
5. Enter the following values:
Bulk voltage
14.25 V
Max bulk time
480 min
Absorption voltage
14.25 V
Max abs. time
240 min
Float voltage
13.50 V
Note: Please refer to the manual of the MLI-Ultra for more information about the configuration and
installation of an MLI-Ultra battery.

18
PowerCombi Inverter/Charger
6 OPERATING INSTRUCTIONS
6.1 General
WARNING!
The PowerCombi Inverter/Charger must be properly assembled in accordance with the
Installation Instructions before it is used.
6.2 Main switch
The main switch on the PowerCombi Inverter/Charger has three positions: On (▬), Off () and
Remote (═).
WARNING!
Switching to Off or Remote does not cut off the connection to the batteries or the AC
source. This means that voltages are still present inside the apparatus!
Notes: - Provided that the main switch is not in the Remote position, the PowerCombi
Inverter/Charger will switch on when a battery is connected and external AC power is
available, even if the switch is in the off position!
- If external AC power is unavailable or outside the specified limits, the PowerCombi
Inverter/Charger operates as an inverter.
- When using a PowerCombi Remote Control, switch to Remote.
6.3 Status LEDs
Battery Input voltage indicator
LED status
Voltage
Red
< 11.0 V or >15.5 V
Orange
11.0~ 11.5 V or 15.0 ~ 15.5 V
Green
11.5 ~ 15.0 V
Output Load indicator
LED status
Voltage
Red
> 115%
Orange
100 - 115%
Green
0 - 100%

PowerCombi Inverter/Charger
19
Charger State indicator
Led status
Meaning
Off
Inverter mode
Green
Float Mode
Orange
Absorption Mode
Orange, slow blinking
Bulk mode
Alarm indicator
Led status
Meaning
What to do?
Green
Power OK
Normal operation
Green, slow blinking
Internal temp.
too high
1. Improve ventilation. Make sure
ventilation openings in the unit are
not obstructed.
2. Reduce ambient temperature.
3. Reduce load.
Green, fast blinking
Internal temp.
too low
Increase ambient temperature.
Red
Over load /
short circuit
protection
1. Reduce load if restart failed.
2. Reset the unit manually with the
main switch (item D in Figure 3).
Red, slow blinking
Battery under
voltage
protection,
DC-input
voltage too low
Check if DC cables are too long /
narrow. Reduce DC cable lengths
or use cables with a larger gauge.
Loose or corroded connections:
Tighten the connections; correct
damaged cables immediately.
Flat battery: Disconnect the load
and recharge the battery
Red, fast blinking
DC-input
voltage too high
Check battery voltage and switch
off other chargers (Battery Over
Voltage Protection).
Orange
Phase/fre-
quency failure
Make sure AC input frequency
matches the Unit output frequency.
Orange, slow blinking
Gridover/under
voltageprotection
Make sure AC input is within
90VAC ~ 132VAC

20
PowerCombi Inverter/Charger
Orange, fast blinking
Grid over
current
protection
1. Turn off the load and make sure
there is no short circuit at AC OUT.
2. Check the AC input current limit
(DIP switches S4, S5 and S6).
3. Reset the unit manually with the
main switch.
6.4 3-step charge process
The PowerCombi can connect many types of batteries (default setting is Flooded). Parameters can
be adjusted, by software, to meet the battery charging characteristics.
The PowerCombi includes an automatic 3-stage charging process: Bulk, Absorb, and Float Charge.
The automatic 3-stage charge process provides complete recharging and monitoring of the batteries
without damage due to overcharging.
Figure 8: Three step charge system
•Bulk charging; the initial stage of charging. While bulk charging, the charger supplies the
battery with controlled constant current. The charger will remain in bulk charge until the
absorption charge voltage (determined by the Battery Type selection) is achieved and charging
time is 0.5~20 hours (configurable, see section 5.2), then switches to absorption charging.
•Absorbtion charging; the second charging stage and begins after the absorbtion voltage has
been reached. Absorbtion charging provides the batteries with a constant voltage and reduces
the DC charging current in order to maintain the absorbtion voltage setting. Charging for 0.5~10
hours (configurable, see section 5.2), then switches to final charging.
•Float charging; the third charging stage occurs at the end of the absorbtion charging time.
While final charging, the charge voltage is reduced to the final charge voltage (determined by
the battery type). In this stage, the batteries are kept fully charged and ready if needed by the
inverter. The float charging stage reduces battery gassing, minimizes watering requirements (for
flooded batteries), and ensures the batteries are maintained at optimum capacity.
•Temperature compensated charging; by installing the battery temperature sensor (for Lead
Acid batteries only) the charge voltages are automatically adapted for deviating temperatures.
When the battery temperature is low, the charge voltage increases. On the other hand, when the
battery temperature is high, the charge voltage is decreased. Overcharge and gassing are
prevented this way. This will extend the life of your batteries.