Mastervolt MASS COMBI ULTRA User manual

MULTIPLE UNITS
MASS COMBI ULTRA & MASS COMBI PRO
Parallel or three-phase configurations
INSTALLATION MANUAL
10000007117/03

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
TABLE OF CONTENTS:
1GENERAL INFORMATION..............................................................................................................................................3
1.1 Use of this manual..............................................................................................................................................3
1.2 Validity of this manual.........................................................................................................................................3
1.3 Purpose of a multiple configuration ....................................................................................................................3
1.4 General installation guidelines............................................................................................................................3
1.5 Overview of the Mass Combi..............................................................................................................................4
2FLOWCHART ..................................................................................................................................................................5
3PARALLEL CONFIGURATION WITH MASTERADJUST...............................................................................................6
3.1 Materials needed................................................................................................................................................6
3.2 Preparations.......................................................................................................................................................6
3.3 DC wiring of parallel units...................................................................................................................................7
3.4 AC wiring of parallel units...................................................................................................................................7
3.5 Network wiring of parallel units...........................................................................................................................8
3.6 Configuration with MasterAdjust.........................................................................................................................8
3.7 Initial start-up....................................................................................................................................................10
4PARALLEL CONFIGURATION WITH DIP SWITHES...................................................................................................11
4.1 Materials needed..............................................................................................................................................11
4.2 Preparation.......................................................................................................................................................11
4.3 DC wiring of parallel units.................................................................................................................................11
4.4 AC wiring of parallel units.................................................................................................................................12
4.5 Network wiring of parallel units.........................................................................................................................12
4.6 Configuration with DIP switches.......................................................................................................................13
4.7 Initial start-up....................................................................................................................................................13
5THREE-PHASE CONFIGURATION WITH MASTERADJUST......................................................................................14
5.1 Materials needed..............................................................................................................................................14
5.2 Preparations.....................................................................................................................................................14
5.3 DC wiring of three-phase units.........................................................................................................................15
5.4 AC wiring of three-phase units .........................................................................................................................15
5.5 Network wiring of three-phase units .................................................................................................................16
5.6 Configuration with MasterAdjust.......................................................................................................................16
5.7 Initial start-up....................................................................................................................................................18
5.8 General remark on three-phase public power grids..........................................................................................18
6TROUBLESHOOTING................................................................................................................................................... 20

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
3
1 GENERAL INFORMATION
1.1 Use of this manual
This installation manual must be read in combination with the standard user manual that is supplied with each unit.
CAUTION!
Read chapter SAFETY GUIDELINES AND WARNINGS of the user manual
that comes with the unit.
Every person who works with the Mass Combi Ultra or Mass Combi Pro should be familiar with the contents of this manual and
must carefully follow the instructions contained herein.
1.2 Validity of this manual
This installation manual serves as a guideline for the safe and effective installation and commissioning of the Mass Combi Ultra
or Mass Combi Pro in a multiple unit configuration. This can be a parallel configuration, a three-phase configuration, or a
combined three-phase and parallel configuration.
This manual is valid for the following models:
Product code
Model
38013000
Mass Combi Ultra 12/3000-150
CAUTION!
Check the identification label
for the device version. The
hardware must be version D
or later.
38023500
Mass Combi Ultra 24/3500-100
38043500
Mass Combi Ultra 48/3500-50
38513000
Mass Combi Pro 12/3000-150
38523500
Mass Combi Pro 24/3500-100
Note: Most procedures described in this manual are based on the Mass Combi Ultra (MCU). Some of the instructions may not
be relevant, or slightly different, for a Mass Combi Pro (MCP).
1.3 Purpose of a multiple configuration
There are several reasons for a multiple unit configuration:
•If more output power is needed than one unit can supply, two up to ten MCU or MCP units can be installed in parallel.
•If redundancy is required, units can be installed in parallel to maintain reliable power supply. If one of the units should fail,
the remaining units continue.
•Three MCU or MCP units can be installed in a 3-phase configuration to supply three-phase AC power for high-power loads
like air-conditioning. By connecting more units in parallel as well, virtually unlimited three-phase power can be made
available.
1.4 General installation guidelines
When using units in a multiple unit configuration, the following requirements are applicable in addition to the requirements
mentioned in the relevant user manual:
•Use identical MCU or MCP units (with the same product codes) in a multiple unit configuration. Provided that they use the
same DC voltage, also a mix of MCU and MCP units can be used.
•Maximum number of units in parallel: 10.
•Maximum number of units in a three-phase parallel configuration: 3 x 3.
•Installation and commissioning of multiple units requires configuration of MasterBus settings in MasterAdjust from a
Windows PC connected to a unit via a MasterBus USB Interface. MasterAdjust software is available as free to download
software on the Mastervolt website: www.mastervolt.com. The installer must be familiar with the configuration tool.
•Allow sufficient ventilation to prevent build-up of hot air. When installing multiple units either side by side or vertically above
each other, at least 10 cm free space must be kept between the units. If necessary, adequate measures must be taken to
avoid one unit heating up the other.
•Keep DC cables to the units all the same length and size. Keep the cable lengths as short as possible!
WARNING!
High currents will pass through the wiring! The wire sizes stated in this manual are only
guidelines. Fusing is based on the size and length of the cable, which in turn depend on the load
connected to the unit. Always comply with all local rules and regulations.

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
1.5 Overview of the Mass Combi
1. Display with front switch
2. Main battery negative
3. Main battery positive
4. Secondary battery positive
5. Solar DC terminal *
6. Mains AC input terminal
7. Generator AC input terminal
8. AC output 1
9. AC output 2 (switched)
10. DIP switch units (2x8)
11. Fan (3x)
12. Ground stud
13. Sync connector (2x)
14. Temperature sensor connector
15. MasterBus connector (2x)
* MCU 12/3000-150 and 24/3500-100 only
Remove the cover by loosening these two screws:

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
5
2 FLOWCHART
Use the following flowchart to determine which installation procedure to use.
Click here (or go
to page 14) for
the
3-phase with
MasterAdjust
installation
procedure
Start
3-Phase?
More than 2
units?
Lithium Ion
Batteries?
Click here (or go
to page 6) for
the
parallel with
MasterAdjust
installation
procedure
YES
Parallel
configuration
3-Phase
configuration
NO
Click here (or go
to page 11) for
the
parallel with
DIP switches
installation
procedure
YES
NO
NO
YES
Setup via
DIP
switches?
NO
YES

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with MasterAdjust
3 PARALLEL CONFIGURATION WITH MASTERADJUST
Up to 10 units may be set in parallel with MasterAdjust. Either use identical MCU or MCP units, or a mix of MCU and MCP units
that use the same DC voltage. Basic knowledge of MasterAdjust is required.
3.1 Materials needed
Description
Quantity
Multiple units of the same type
n
Temperature sensor with cable and plug (included)
MasterBus Terminator (included but not always needed)
MasterBus cables between units (product code e.g. 3 meter: 77040300)
n-1
Sync cables to interconnect all units (product code e.g. 3 meter: 6502000030)
n-1
MasterBus USB Interface (product code: 77030100)
1
Windows based PC with the MasterAdjust configuration tool
1
DC + cable with fuse
n
DC –cable
n
AC cable to connect the AC input of the unit to an external power source
n
AC cable to connect the external load to OUTPUT 1
n
AC cable to connect the external load to OUTPUT 2
n
3.2 Preparations
-Make sure that all power sources (AC and DC) are switched off.
-Make sure that DIP switches A1 and A2 are off on all units.
DIP switch location
All other DIP switches (B1…B8 and A3…A8) on the Replica unit(s) must match the settings on the Primary unit. For an
overview of DIP switch settings, please see the user manual.

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with MasterAdjust
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3.3 DC wiring of parallel units
Note: Always use the same length positive and negative cables! Be aware that to keep the drawings in this chapter clear and
easy to read, the cable lengths have not been drawn in proportion to each other.
Power system
Minimum DC cable
cross section
Inline fuse
Recommended
battery bank
Indicated cable sizes are for cables from
unit to busbar and shorter than 3m. Cables
from busbar to battery bank should be
twice the diameter. When cables are
longer than 3m, the size should be
increased to compensate for cable losses.
12V
95 mm2
350 A
800 Ah
24V
50 mm2
175 A
400 Ah
48V
35 mm2
80 A
200 Ah
3.4 AC wiring of parallel units
* Neutral to ground bonding depending on local regulations
FUSE
FUSE
BUSBAR
BATTERY
SWITCH
® = Residual Current Device (RCD)
© = Circuit Breaker, no RCD!
Breaker AC OUT-2 = 50 A max
®
©
©
©
®
®
PRIMARY UNIT
REPLICA UNIT
BATTERY BANK

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with MasterAdjust
Generator power
AC cable cross section
Breaker size
Max 3.5 kW
2.5 mm2
20 A
3.6 –7 kW
4.0 mm2
40 A
7.1 –10 kW
6.0 mm2
50 A
> 10 kW
10.0 mm2
63 A
Mains power
AC cable cross section
Max 16 A
3x 2.5 mm2
Max 32 A
3x 4.0 mm2
3.5 Network wiring of parallel units
3.6 Configuration with MasterAdjust
Pre-commissioning
1. Make sure that the units are switched off.
2. Make sure that all connections are firmly tightened.
3. Install the DC fuses and close the battery switch.
4. Close the covers of all units.
5. Close the AC breaker in AC output 1 of each unit.
6. Switch on all units.
7. If not already available, connect a MasterBus USB Interface to the MasterBus network and to a PC, and open MasterAdjust.
Installation or configuration errors may come up in MasterAdjust while the configuration is in progress. This is normal.
Configuration
8. In MasterAdjust, check that the units are running the latest firmware (software version). See the Mastervolt Portal for more
information.
9. In the device list, in the left pane of MasterAdjust, right-click the Primary unit and select Login.
The Primary unit is the device that has the AC OUT-2 connection. The other units are called Replica units. Note that in the
older MCU and MCP dialog windows Primary is called Master and Replica is called Slave.
Battery
temperature
sensor
Sync cable
MasterBus cable
MasterBus
network or
terminator
MasterBus
network or
terminator
Battery
temp. sensor

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with MasterAdjust
9
10.Select Installer and enter the installer code.
11.Go to the Configuration tab and give the unit a logical name. For example, MCU Primary. Do the same for the Replica units.
It's good practice to label them Replica 1, Replica 2 etc.
Note: battery settings must be configured the same on all units.
12.Return to the Configuration tab of the Primary unit. All settings are done here. However, if Mastervolt Lithium-Ion batteries
are connected, all events, like Stop Discharge for example, must be configured for ALL units separately.
13.From the Cluster drop-down list, select Single Phase. You may need to maximize the MasterAdjust window or scroll all the
way to the right to see this.
14.From the Dev. Per phase drop-down list, select the number of units in parallel (Primary + Replica).
15.Click the Select devices button to be able to select the Replica unit(s).

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with MasterAdjust
16.Notice the Cluster topology and Cluster state. Topology monitors the size of the cluster (whether the selected number of
units is equal to the selected number of devices). State monitors the configuration state of the cluster.
Click the Activate cluster button to finish the cluster configuration.
In the device list, in the left pane of MasterAdjust, the Replica unit(s) will now be listed under the Primary unit.
3.7 Initial start-up
1. Switch all units off and on again.
2. Check that the units are working as inverter.
3. Close the AC breaker in the Mains Input of each unit.
4. Check that the units are working as charger when 230VAC is applied to the Mains Inputs.
5. If applicable repeat this procedure for the generator.

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with DIP switches
11
4 PARALLEL CONFIGURATION WITH DIP SWITHES
Two units can be set in parallel with DIP-switches. This can be two identical MCU or MCP units. Provided that they use the
same DC voltage, this can also be one MCU and one MCP.
4.1 Materials needed
Description
Quantity
Two units
2
Temperature sensor with cable and plug (included)
MasterBus Terminator (included but not always needed)
MasterBus cables between units (product code e.g. 3 meter: 77040300)
1
Sync cables to interconnect all units (product code e.g. 3 meter: 6502000030)
1
DC + cable with fuse
2
DC –cable
2
AC cable to connect the AC input of the unit to an external power source
2
AC cable to connect the external load to OUTPUT 1
2
AC cable to connect the external load to OUTPUT 2
2
4.2 Preparation
-Make sure that all power sources (AC and DC) are switched off.
4.3 DC wiring of parallel units
Note: Always use the same length positive and negative cables! Be aware that to keep the drawings in this chapter clear and
easy to read, the cable lengths have not been drawn in proportion to each other.
Power system
DC cable cross
section
Inline fuse
Recommended
battery bank
Indicated cable sizes are for cables from
unit to busbar and shorter than 3m. Cables
from busbar to battery bank should be
twice the diameter. When cables are
longer than 3m, the size should be
increased to compensate for cable losses.
12V
95 mm2
350 A
800 Ah
24V
50 mm2
175 A
400 Ah
48V
35 mm2
80 A
200 Ah
FUSE
FUSE
BUSBAR
BATTERY
SWITCH
BATTERY BANK

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with DIP switches
4.4 AC wiring of parallel units
* Neutral to ground bonding depending on local regulations
Generator power
AC cable cross section
Breaker size
Max 3.5 kW
2.5 mm2
20 A
3.6 –7 kW
4.0 mm2
40 A
7.1 –10 kW
6.0 mm2
50 A
> 10 kW
10.0 mm2
63 A
Mains power
AC cable cross section
Max 16 A
3x 2.5 mm2
Max 32 A
3x 4.0 mm2
4.5 Network wiring of parallel units
® = Residual Current Device (RCD)
© = Circuit Breaker, no RCD!
Breaker AC OUT-2 = 50 A max
®
©
©
©
®
®
PRIMARY UNIT
REPLICA UNIT
Battery
temperature
sensor
Sync cable
MasterBus cable
MasterBus
network or
terminator
MasterBus
network or
terminator
Battery
temp. sensor

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Parallel configuration with DIP switches
13
4.6 Configuration with DIP switches
Pre-commissioning
1. Make sure that the units are switched off.
2. Make sure that all connections are firmly tightened.
Configuration
3. Use a small screwdriver to carefully set the DIP switches of block A:
DIP switch location MCU & MCP
On the Primary unit set DIP switch A1 on (position 1) and keep A2 off (position 0).
On the Replica unit keep DIP switch A1 off (position 0) and set A2 on (position 1).
All other DIP switches (B1…B8 and A3…A8) on the Replica unit must match the settings on the Primary unit. For an
overview of DIP switch settings, please see the user manual.
4.7 Initial start-up
1. Install the DC fuses and close the battery switch.
2. Close the covers of all units.
3. Close the AC breaker in AC output 1 of each unit.
4. Switch on all units.
5. Check that the units are working as inverter.
6. Close the AC breaker in the Mains Input of each unit.
7. Check that the units are working as charger when 230VAC is applied to the Mains Inputs.
8. If applicable repeat this procedure for the generator.

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
5 THREE-PHASE CONFIGURATION WITH MASTERADJUST
Three identical MCU or MCP units can be set in a 3-phase star-configuration with MasterAdjust. Provided that they use the
same DC voltage, this can also be a mix of MCU and MCP units. Basic knowledge of MasterAdjust is required.
5.1 Materials needed
Description
Quantity
Three identical units or MCU & MCP with the same DC voltage
3
Temperature sensor with cable and plug (included)
MasterBus Terminator (included but not always needed)
MasterBus cables between units (product code e.g. 3 meter: 77040300)
2
Sync cables to interconnect all units (product code e.g. 3 meter: 6502000030)
2
MasterBus USB Interface (product code: 77030100)
1
Windows based PC with the MasterAdjust configuration tool
1
DC + cable with fuse
3
DC –cable
3
AC cable to connect the AC input of the unit to an external power source
3
AC cable to connect the external load to OUTPUT 1
3
AC cable to connect the external load to OUTPUT 2
3
5.2 Preparations
-Make sure that all power sources (AC and DC) are switched off.
-Make sure that DIP switches A1 and A2 are off on all units.
DIP switch location
All other DIP switches (B1…B8 and A3…A8) on the Replica units must match the settings on the Primary unit. For an
overview of DIP switch settings, please see the user manual.

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
15
5.3 DC wiring of three-phase units
Note: Always use the same length positive and negative cables! Be aware that to keep the drawings in this chapter clear and
easy to read, the cable lengths have not been drawn in proportion to each other.
Power system
DC cable cross
section
Inline fuse
Recommended
battery bank
Indicated cable sizes are for cables from unit to
busbar and shorter than 3m. Cables from busbar
to battery bank should be twice the diameter.
When cables are longer than 3m, the size should
be increased to compensate for cable losses.
12V
95 mm2
350 A
800 Ah
24V
50 mm2
175 A
400 Ah
48V
35 mm2
80 A
200 Ah
5.4 AC wiring of three-phase units
Mains power cable cross section: 2.5 mm2
Generator power
AC cable cross section
Breaker size
Max 10 kW
2.5 mm2
25 A
11 –20 kW
4.0 mm2
40 A
21 –30 kW
6.0 mm2
50 A
> 30 kW
10.0 mm2
63 A
FUSE
FUSE
BUSBAR
BATTERY
SWITCH
BATTERY BANK
L1
L2
L3
L1
L2
L3
* Neutral to ground bonding depending on local regulations

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
5.5 Network wiring of three-phase units
5.6 Configuration with MasterAdjust
Pre-commissioning
1. Make sure that the units are switched off.
2. Make sure that all connections are firmly tightened.
3. Install the DC fuses and close the battery switch.
4. Close the covers of all units.
5. Switch on all units.
6. If not already available, connect a MasterBus USB Interface to the MasterBus network and to a PC, and open MasterAdjust.
Installation or configuration errors may come up in MasterAdjust while the configuration is in progress. This is normal.
Configuration
7. In MasterAdjust, check that the units are running the latest firmware. See the Mastervolt Portal for more information.
8. In the device list, in the left pane of MasterAdjust, right-click the L1 unit and select Login.
9. Select Installer and enter the installer code.
10.Go to the Configuration tab and give the unit a logical name. For example, MCU L1, MCU L2 and MCU L3.
11.Return to the Configuration tab of the L1 unit. All settings are done here. However, if Mastervolt Lithium-Ion batteries are
connected, all events, like Stop Discharge for example, must be configured for ALL units separately.
12.In the Cluster pane, from the Phase System drop-down list, select Three Phase. You may need to maximize the
MasterAdjust window or scroll all the way to the right to see this.
L1
L2
L3
Battery
temperature
sensor
Sync cable
MasterBus cable
MasterBus
network or
terminator
Battery temp.
sensor
Battery temp.
sensor
Sync cable
MasterBus cable
MB
network
or term.

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
17
13.From the Dev. Per phase drop-down list, select PER PHASE the number of units in parallel (Primary + Replica)!
In our example this is 1.
14.Click the Select devices button to be able to select the L2 and L3 units.
In the Phase L2 section, from the Phase master (Primary) drop-down list, select the L2 unit.
In the Phase L3 section, from the Phase master (Primary) drop-down list, select the L3 unit.

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
15.Notice the Cluster topology and Cluster state. Topology monitors the size of the cluster (whether the selected number of
units is equal to the selected number of devices). State monitors the configuration state of the cluster.
Click the Activate cluster button to finish the cluster configuration. The Cluster state will change from "Incomplete" to
"Active".
16.In the device list, in the left pane of MasterAdjust, the L2 and L3 units will now be listed under the L1 unit.
5.7 Initial start-up
1. Switch all units off and on again.
2. Check that the units are working as inverter.
3. Close the AC breaker in the Mains Input of each unit.
4. Check that the units are working as charger when 230Vac is applied to the Mains Inputs.
5. If applicable repeat this procedure for the generator.
Note: in three-phase configuration the units will only switch over to charger mode if all three phases are present and accepted
(gen and/or mains)
5.8 General remark on three-phase public power grids
Depending on national guidelines, the rotation of the three-phase public grid can be different. The field-rotation of the configured
Combi-system is always L1-L2-L3-L1-L2-L3- ... etc. If the public grid has a –in respect to the Combi-rotation –reverse rotation
(L1-L3-L2-L1-L3-L2 etc.), then the grid power will not be accepted by the Combis and result in an error and/or units remaining in
inverter-mode. To overcome this situation, the incoming phase lines L2 and L3 on the mains-inputs of the Combis L2 and L3 the
must be swapped. There are several ways to achieve this:
•Use of three-phase inlets/sockets with integrated phase swapping. Plugs from Mennekes for example, can invert the phases
by simply rotating a swivel with a screwdriver.
-Phase inverter plug 32A (EAN: 4015394215530)
-Phase inverter plug 16A (EAN: 4015394201182)
-Panel mounted phase inverter inlet 16A (EAN: 4015394180630)
-Wall mounted phase inverter inlet 32A (EAN: 4015394215769)
-Wall mounted phase inverter inlet 16A (EAN: 4015394207450)

Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
Three-phase configuration with MasterAdjust
19
•Use of a double pole double throw switch of at least 32A / 400V)
•Use of an AC 1x6 relay controlled by MasterBus (product code: 77031500):
To control the relay, suitable events need to be configured. This can be done from an EasyView 5 for example. See the
relevant user manual for more information on events.
INCOMING THREE-PHASE +N
400/230
TO MASTERVOLT COMBI UNITS L1, L2,L3

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Mass Combi Ultra, Mass Combi Pro –Installation Manual Multiple Units
6 TROUBLESHOOTING
Errors in parallel configuration will be shown by the LED indicators in the display.
Note: An error also occurs if the AC OUT-1 of the units are not connected to each other (breakers!).
The "Mains" LED on the Replica unit will keep blinking while the same LED on the Primary unit will be solid on when the MAINS
AC input is accepted. This normal behavior. Likewise LED "GEN" on the Replica unit will keep blinking while the same LED on
the Primary unit will be solid on when the GEN AC input is accepted. This is also normal behavior.
LED 1 is MCU 12/3000-150 and 24/3500-100 only