Victron energy MultiPlus 2kVA 120V User manual

MultiPlus 2kVA 120V
rev 00 - 2021
ENGLISH

Table of Contents
1. Safety Instructions ................................................................................................................... 1
2. Description ............................................................................................................................ 2
2.1. General ....................................................................................................................... 2
2.2. Battery charger .............................................................................................................. 2
2.3. Self consumption – solar energy storage systems ...................................................................... 3
3. Operation .............................................................................................................................. 4
3.1. On / Off / Charger-only Switch ............................................................................................. 4
3.2. Remote control .............................................................................................................. 4
3.3. LED Indications .............................................................................................................. 4
4. Installation ............................................................................................................................. 6
4.1. Location ...................................................................................................................... 6
4.2. Connection of the Battery cables .......................................................................................... 6
4.3. Connection of the AC cabling .............................................................................................. 6
4.4. Optional Connections ....................................................................................................... 7
4.4.1. Second Battery .................................................................................................... 7
4.4.2. Temperature Sensor .............................................................................................. 7
4.4.3. Remote Control .................................................................................................... 7
4.4.4. Programmable relay .............................................................................................. 7
4.4.5. Parallel Connection (see appendix C) .......................................................................... 7
4.4.6. Three-phase operation (see appendix D) ...................................................................... 8
5. Configuration ......................................................................................................................... 9
5.1. Standard settings: ready for use ........................................................................................... 9
5.2. Explanation of settings ...................................................................................................... 9
5.3. Configuration of the MultiPlus ............................................................................................ 11
5.3.1. VE.Bus Quick Configure Setup ................................................................................ 12
5.3.2. VE.Bus System Configurator .................................................................................. 12
5.4. Configuration with DIP switches ......................................................................................... 12
5.4.1. DIP switch 1 to 3 ................................................................................................ 12
5.4.2. Exemplary settings .............................................................................................. 12
6. Maintenance ......................................................................................................................... 14
7. Trouble Shooting Table ........................................................................................................... 15
8. Technical Data ...................................................................................................................... 17
9. APPENDIX ........................................................................................................................... 19
9.1. Appendix A: overview connections ...................................................................................... 19
9.2. Appendix B: installation information ..................................................................................... 19
9.3. Appendix C: parallel connection ......................................................................................... 20
9.4. Appendix D: three-phase connection ................................................................................... 21
9.5. Appendix E: charge algorithm ............................................................................................ 21
9.6. Appendix F: temperature compensation ................................................................................ 22
9.7. Appendix G: dimensions .................................................................................................. 22
MultiPlus 2kVA 120V

1. Safety Instructions
General
Please familiarize yourself with the safety features and instructions by first reading the documentation supplied with this product
before using the equipment. This product has been designed and tested in accordance with international standards. The
equipment must be used exclusively for the purpose for which it was designed.
ELECTRIC SHOCK HAZARD
The product is used in conjunction with a permanent energy source (battery). Input and/or output terminals may still be
dangerously energized, even when the equipment is switched off. Always switch off the AC supply and the battery before carrying
out maintenance or servicing the product.
The product has no internal user-serviceable components. Do not remove the front plate or operate the product if any panels
have been removed. All servicing must be undertaken by qualified personnel.
Never use the product where there is a risk of gas or dust explosions. Consult the battery manufacturer's information to ascertain
that the product is intended for use in conjunction with the battery. Always comply with the battery manufacturer's safety
instructions.
Never try to charge non-rechargeable - or frozen batteries.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance
Do not lift heavy loads without assistance.
Installation
Read the installation instructions in the installation manual before installing the equipment.
This is a Safety Class I product (supplied with a protective grounding terminal). Uninterruptible protective grounding must be
provided at the AC input and/or output terminals. Alternatively, the grounding point located externally on the product
may be used. Whenever it is likely that the grounding protection has been damaged, the product must be turned off and secured
against unintended operation; please contact qualified service staff.
Ensure that the DC and AC input cables are fused or fitted with circuit breakers.
Ensure that the equipment is used under the correct ambient conditions. Never operate the product in a wet or dusty
environment. Ensure there is adequate free space for ventilation around the product and check that the ventilation vents are not
blocked.
Ensure that the required system voltage does not exceed the product's capacity.
Transport and Storage
Ensure that the mains power and battery leads have been disconnected before storing or transporting the product.
No liability can be accepted for any transport damage if the equipment is shipped in non-original packaging.
Store the product in a dry environment; the storage temperature must be between -40°C and 70°C.
Consult the battery manufacturer's manual in respect of transport, storage, charging, recharging and disposal of the battery.
MultiPlus 2kVA 120V
Page 1 Safety Instructions

2. Description
2.1. General
Multifunctional
The MultiPlus gets its name from the multiple functions it can perform. It is a powerful true sine wave inverter, a sophisticated
battery charger that features adaptive charge technology and a high-speed AC transfer switch in a single enclosure. Beside these
primary functions, however, the MultiPlus has several advanced features that provide a range of new applications as outlined
below.
Uninterrupted AC power
In the event of a grid failure, or shore or generator power being disconnected, the inverter within the MultiPlus is automatically
activated and takes over supply to the connected loads. This happens so fast (less than 20 milliseconds) that computers and
other electronic equipment will continue to operate without disruption.
Parallel and 3-phase operation capability
Up to 6 inverters can operate in parallel to achieve higher power output.
Operation in 3-phase configuration is also possible.
PowerControl – Dealing with limited generator or shore side power
With a Multi Control Panel a maximum generator or shore current can be set. The MultiPlus will then take account of other AC
loads and use whatever is extra for charging, thus preventing the generator or shore supply from being overloaded.
PowerAssist – Boosting the capacity of shore or generator power
This feature takes the principle of PowerControl to a further dimension allowing the MultiPlus Compact to supplement the capacity
of the alternative source. Where peak power is so often required only for a limited period, it is possible to reduce the size of
generator needed or conversely enable more to be achieved from the typically limited shore connection. When the load reduces,
the spare power is used to recharge the battery.
Programmable relay
The MultiPlus is equipped with a programmable relay that by default is set as an alarm relay. The relay can be programmed for all
kinds of other applications however, for example as a starter relay for a generator.
2.2. Battery charger
Adaptive 4-stage charging characteristics: bulk – absorption – float – storage
The microprocessor-driven adaptive battery management system can be adjusted for various types of batteries. The adaptive
function automatically adapts the charging process to battery use.
The right amount of charge: variable absorption time
In the event of slight battery discharge, absorption is kept short to prevent overcharging and excessive gas formation. After deep
discharging, the absorption time is automatically extended in order to fully charge the battery.
Preventing damage due to excessive gassing: the Battery Safe mode
If, in order to quickly charge a battery, a high charge current in combination with a high absorption voltage has been chosen,
damage due to excessive gassing will be prevented by automatically limiting the rate of voltage increase once the gassing voltage
has been reached.
Less maintenance and aging when the battery is not in use: the Storage mode
The Storage mode kicks in whenever the battery has not been subjected to discharge during 24 hours. In the Storage mode float
voltage is reduced to 2,2V/cell (13,2V for 12V battery) to minimise gassing and corrosion of the positive plates. Once a week the
voltage is raised back to the absorption level to ‘equalize’ the battery. This feature prevents stratification of the electrolyte and
sulphation, a major cause of early battery failure.
Two DC outputs for charging two batteries
The main DC terminal can supply the full output current. The second output, intended for charging a starter battery, is limited to
1A and has a slightly lower output voltage.
Increasing service life of the battery: temperature compensation
The temperature sensor (supplied with the product) serves to reduce charging voltage when battery temperature rises. This is
particularly important for maintenance-free batteries, which could otherwise dry out by overcharging.
MultiPlus 2kVA 120V
Page 2 Description

More on batteries and charging
Our book ‘Energy Unlimited’ offers further information on batteries and battery charging, and is available free of charge on our
website (see www.victronenergy.com → Support & Downloads’ → General Technical Information). For more information on
adaptive charging, please also refer to the General Technical Information on our website.
2.3. Self consumption – solar energy storage systems
When the MultiPlus is used in a configuration in which it will feed back energy to the grid it is required to enable grid code
compliance by selecting the grid code country setting with the VEConfigure tool.
Once set, a password will be required to disable grid code compliance or change grid code related parameters.
If the local grid code is not supported by the MultiPlus an external certified interface device should be used to connect the
MultiPlus to the grid.
Special note for Australian customers: IEC62109.1 certification and CEC approval for off-grid use does NOT imply approval for
grid-interactive installations. Additional certification to IEC 62109.2 and AS 4777.2.2015 are required before grid-interactive
systems can be implemented. Please check Clean Energy Council website for current approvals.
MultiPlus 2kVA 120V
Page 3 Description

3. Operation
3.1. On / Off / Charger-only Switch
When switched to ‘on’, the product is fully functional. The inverter will come into operation and the LED ‘inverter on’ will light up.
An AC voltage connected to the ‘AC in’ terminal will be switched through to the ‘AC out’ terminal, if within specifications. The
inverter will switch off, the ‘Charger’ LED will light up and the charger commences charging. If the voltage at the ‘AC-in’ terminal is
not within specifications, the inverter will switch on.
When the switch is switched to ‘charger only’, only the battery charger of the MultiPlus will operate (if mains voltage is present). In
this mode input also is switched through to the ‘AC out’ terminal.
When only the charger function is required, ensure that the switch is switched to ‘charger only’. This prevents
the inverter from being switched on if the mains voltage is lost, thus preventing the batteries from running flat.
3.2. Remote control
Remote control is possible with a switch or with a Multi Control panel. The Multi Control panel has a simple rotary knob with which
the maximum current of the AC input can be set: see PowerControl in Section 2.
3.3. LED Indications
LED off
LED flashes
LED illuminated
Inverter/Charger
On / Off / Charger-only switch = On
The inverter is switched on and supplies power to the load.
On / Off / Charger-only switch = Charger only
The inverter is switched on and supplies power to the load.
Pre-alarm: overload, or
battery voltage low, or
inverter temperature high
On / Off / Charger-only switch = On
The inverter is switched off due to one of the following alarms:
overload, or
battery voltage low, or
inverter temperature high, or
DC ripple voltage too high.
MultiPlus 2kVA 120V
Page 4 Operation

On / Off / Charger-only switch = On
The AC input voltage is switched through and the charger operates in float mode.
On / Off / Charger-only switch = On. PowerControl and PowerAssist:
The AC input is switched through and the charge current is zero.
The inverter is switched on and, in case of PowerAssist, assists the AC input by supplying
additional power to the load (see section 2.1).
On / Off / Charger-only switch = On. Energy Storage System (ESS):
The AC input voltage is switched through. The inverter is switched on and supplies power to the
load, or excess power to the mains.
Charger only
On / Off / Charger-only switch = Charger only
The AC input voltage is switched through and the charger operates in bulk or absorption mode.
On / Off / Charger-only switch = Charger only
The AC input is switched through and the charger operates in float or storage mode.
The MultiPlus will shut down if four abnormal events occur within 30 seconds. The MultiPlus can be reset by
switching to Off and then to On.
MultiPlus 2kVA 120V
Page 5 Operation

4. Installation
This product should be installed by a qualified electrician.
4.1. Location
The product must be installed in a dry and well-ventilated area, as close as possible to the batteries. There should be a clear
space of at least 10cm around the appliance for cooling.
1. Excessively high ambient temperature will result in the following:
• Reduced service life
• Reduced charging current.
• Reduced peak capacity, or shutdown of the inverter.
2. Never mount the product directly above the batteries.
For mounting see G
For safety purposes, this product should be installed in a heat-resistant environment. Prevent the presence of
e.g. chemicals, synthetic components, curtains or other textiles, etc., in the immediate vicinity.
4.2. Connection of the Battery cables
NO internal DC Fuses.
In order to fully utilize the full capacity of the product, batteries with sufficient capacity and battery cables with sufficient cross
section should be used. See table below:
12/2000/80 24/2000/50 48/2000/25
Recommended battery capacity (Ah) 350-1000 200–500 100-250
Recommended DC fuse 300A 200A 100A
Recommended cross section (mm2)
per + and - connection terminal
0 – 5 m 70mm-2 35 mm2 25 mm2
5 – 10 m 95mm2 70 mm2 50mm2
Remark: Internal resistance is the important factor when working with low capacity batteries. Please consult your supplier or the
relevant sections of our book ‘Energy Unlimited’, downloadable from our website.
Procedure
Proceed as follows to connect the battery cables:
Use a torque wrench with insulated box spanner in order to avoid shorting the battery.
Recommended torque: 12 Nm (M8 nut)
Avoid shorting the battery cables.
• Undo the two screws at the bottom of the enclosure and remove the service panel.
• Connect the battery cables: see Appendix A.
• Tighten the nuts well for minimal contact resistance.
All servicing must be undertaken by qualified personnel.
4.3. Connection of the AC cabling
This is a Safety Class I product (supplied with a protective grounding terminal). Uninterruptible protective
grounding must be provided at the AC input and/or output terminals and/or chassis grounding point
located externally on the product.
MultiPlus 2kVA 120V
Page 6 Installation

The MultiPlus is provided with a ground relay (relay H, see appendix B) that automatically connects the Neutral output to the
chassis if no external AC supply is available. If an external AC supply is provided, the ground relay H will open before the input
safety relay closes. This ensures the correct operation of an earth leakage circuit breaker that is connected to the output.
• In a fixed installation, uninterruptable grounding can be secured by means of the grounding wire of the AC input. Otherwise the
casing must be grounded.
• In a mobile installation, interrupting the shore connection will simultaneously disconnect the grounding connection. In that case,
the casing must be connected to the chassis (of the vehicle) or to the hull or grounding plate (of the boat).
• In case of a boat, direct connection to the shore ground is not recommended because of potential galvanic corrosion. The
solution to this is using an isolation transformer.
The mains input & output terminal connector can be found on the bottom of the MultiPlus, see appendix A. The shore or mains
cable must be connected to the connector with a three-wire cable. Use a three-wire cable with a flexible core and a cross section
of at least 6 mm². Recommended torque: 1,6 Nm
Procedure (see appendix A) Do not invert neutral and phase when connecting the AC.
The inverter does incorporate a mains frequency isolating transformer. This precludes the possibility of DC current at any AC port.
Therefore type A RCD’s can be used.
•AC-in
The AC input cable can be connected to the terminal block ‘AC–in’.
From right to left: “N” (neutral), “PE” (earth) and “L” (phase)
The AC input must be protected by a fuse or magnetic circuit breaker rated at 50A, and cable cross-section must be
sized accordingly. If the input AC supply is rated at a lower value, the fuse or magnetic circuit breaker should be down sized
accordingly.
•AC-out
The AC output cable can be connected directly to the terminal block ‘AC-out’.
From left to right: “L” (neutral), “PE” (earth) and “N” (phase)
With its PowerAssist feature the MultiPlus can add up to 2kVA (that is 2000 / 120 = 16A) to the output during periods of peak
power requirement. Together with a maximum input current of 50A this means that the output can supply up to 50 + 16 = 66 A.
An earth leakage circuit breaker and a fuse or circuit breaker rated to support the expected load must be included in series with
the output, and cable cross-section must be sized accordingly.
4.4. Optional Connections
A number of optional connections are possible:
Undo the four screws at the front of the enclosure and remove the front panel.
4.4.1. Second Battery
The Multi has a connection (+) for charging a starter battery. For connection see appendix A.
Trickle charge output is protected by automatic overcurrent & overload protection (trip current 1A Imax= 5,5A)
4.4.2. Temperature Sensor
The temperature sensor supplied with the product may be used for temperature-compensated charging. The sensor is insulated
and must be mounted on the battery minus pole. Default output voltages for Float and Absorption are at 25°C. In adjust mode
temperature compensation is disabled.
4.4.3. Remote Control
The product can be remotely controlled in two ways:
• With an external on/off switch (Remove Link “Remote Switch connector H”)
• With a Multi Control Panel
Please see section 5.4 for appropriate DIP switch settings.
4.4.4. Programmable relay
The MultiPlus is equipped with a multi-functional relay that by default is programmed as an alarm relay. The relay can be
programmed for all kinds of other applications however, for example to start a generator (VEConfigure software needed).
4.4.5. Parallel Connection (see appendix C)
The MultiPlus can be connected in parallel with several identical devices. To this end, a connection is established between the
devices by means of standard RJ45 UTP cables. The system (one or more MultiPlus units plus optional control panel) will require
subsequent configuration (see Section 5).
MultiPlus 2kVA 120V
Page 7 Installation

In the event of connecting MultiPlus units in parallel, the following requirements must be met:
• A maximum of six units connected in parallel.
• Only identical devices may be connected in parallel.
• The DC connection cables to the devices must be of equal length and cross-section.
• If a positive and a negative DC distribution point is used, the cross-section of the connection between the batteries and the DC
distribution point must at least equal the sum of the required cross-sections of the connections between the distribution point
and the MultiPlus units.
• Place the MultiPlus units close to each other, but allow at least 10 cm for ventilation purposes under, above and beside the
units.
• A battery-temperature sensor need only be connected to one unit in the system. If the temperature of several batteries is to be
measured, you can also connect the sensors of other MultiPlus units in the system (with a maximum of one sensor per
MultiPlus). Temperature compensation during battery charging responds to the sensor indicating the highest temperature.
• Only one remote can be connected to the system.
4.4.6. Three-phase operation (see appendix D)
The MultiPlus can also be used in 3-phase wye (Y) configuration. To this end, a connection between the devices is made by
means of standard RJ45 UTP cables (the same as for parallel operation). The system (MultiPlus units plus an optional control
panel) will require subsequently configuration (see Section 5).
Pre-requisites: see Section 4.4.5.
MultiPlus 2kVA 120V
Page 8 Installation

5. Configuration
Settings may only be changed by a qualified engineer.
Carefully read the instructions before changes are made.
Batteries should be placed in a dry and well-ventilated area during charging.
5.1. Standard settings: ready for use
On delivery, the MultiPlus is set to standard factory values. In general, these settings are suitable for single-unit operation.
Possibly, the standard battery charging voltage is not suitable for your batteries! Refer to the manufacturer's
documentation or to your battery supplier!
Standard MultiPlus factory settings
Inverter frequency 60 Hz
Input frequency range 45 - 65 Hz
Input voltage range 94 - 143 VAC
Inverter voltage 120 VAC
Stand-alone / parallel / 3-phase stand-alone
Search mode off
Ground relay on
Charger on/ off on
Battery charge algorithm four-stage adaptive with BatterySafe mode
Charge current 100% of the maximum charge current
Battery type Victron Gel Deep Discharge (also suitable for Victron AGM Deep Discharge)
Automatic equalisation charging off
Absorption voltage 14.4 / 28.8 / 57,6V
Absorption time up to 8 hours (depending on bulk time)
Float voltage 13.8 / 27.6 / 55,2V
Storage voltage 13.2 / 26.4 / 52,8V (not adjustable)
Repeated absorption time 1 hour
Absorption repeat interval 7 days
Bulk protection off
AC input current limit 30A (= adjustable current limit for PowerControl and PowerAssist functions)
UPS feature on
Dynamic current limiter off
WeakAC off
BoostFactor 2
Programmable relay alarm function
5.2. Explanation of settings
Settings that are not self-explanatory are described briefly below. For further information, please refer to the help files in the
software configuration programs (see Section 5.3).
Inverter frequency
Output frequency if no AC is present at the input.
Adjustability: 60Hz; 50Hz
Input frequency range
MultiPlus 2kVA 120V
Page 9 Configuration

Input frequency range accepted by the MultiPlus. The MultiPlus synchronises within this range with the AC input frequency. The
output frequency is then equal to the input frequency.
Adjustability: 45 – 65Hz; 55 – 65Hz; 45 – 55Hz
Input voltage range
Voltage range accepted by the MultiPlus. The MultiPlus synchronises within this range with the AC input voltage. The output
voltage is then equal to the input voltage.
Adjustability:
Lower limit: 94 - 120V
Upper limit: 120 - 143V
Inverter voltage
Output voltage of the MultiPlus in battery operation.
Adjustability: 95 – 128V
Stand-alone / parallel operation / 2-3 phase setting
Using several devices, it is possible to:
increase total inverter power (several devices in parallel)
create a split-phase system
create a 3-phase system.
The standard product settings are for standalone operation. For parallel, or three phase operation see section 4.4.5 and 4.4.6.
Search mode
If search mode is ‘on’, the power consumption in no-load operation is decreased by approx. 70%. In this mode the MultiPlus,
when operating in inverter mode, is switched off in case of no load or very low load, and switches on every two seconds for a
short period. If the output current exceeds a set level, the inverter will continue to operate. If not, the inverter will shut down again.
Search Mode can be set with a DIP switch.
Search Mode ‘shut down’ and ‘remain on’ load levels can be set with VEConfigure.
The standard settings are:
Shut down: 40 Watt (linear load)
Turn on: 100 Watt (linear load)
AES (Automatic Economy Switch)
Instead of the search mode, the AES mode can also be chosen (with help of VEConfigure only).
If this setting is turned ‘on’, the power consumption in no-load operation and with low loads is decreased by approx. 20%, by
slightly 'narrowing' the sinusoidal voltage.
Ground relay (see appendix B)
With this relay (H), the neutral conductor of the AC output is grounded to the chassis when the back-feed safety relay is open.
This ensures the correct operation of earth leakage circuit breakers in the output.
If a non-grounded output is required during inverter operation, this function must be turned off. (Use VEConfigure)
The standard setting is ‘Four-stage adaptive with BatterySafe mode’. See Section 2 for a description.
This is the recommended charge curve. See the help files in the software configuration programs for other features.
Battery type
The standard setting is the most suitable for Victron Gel Deep Discharge, Gel Exide A200, and tubular plate stationary batteries
(OPzS). This setting can also be used for many other batteries: e.g. Victron AGM Deep Discharge and other AGM batteries, and
many types of flat-plate flooded batteries. Four charging voltages can be set with DIP switches.
Automatic equalisation charging
This setting is intended for tubular plate traction batteries. During absorption the voltage limit increases to 2,83V/cell (34V for a
24V battery) once the charge current has tapered down to less than 10% of the set maximum current.
Absorption time
The absortion time depends on the bulk time (adaptive charge curve), so that the battery is optimally charged. If the ‘fixed’
charging characteristic is selected, the absorption time is fixed. For most batteries, a maximum absorption time of eight hours is
MultiPlus 2kVA 120V
Page 10 Configuration

suitable. If an extra high absorption voltage is selected for rapid charging (only possible for open, flooded batteries!), four hours is
preferable. With DIP switches, a time of eight or four hours can be set. For the adaptive charge curve, this determines the
maximum absorption time.
Storage voltage, Repeated Absorption Time, Absorption Repeat Interval
See Section 2.
Bulk Protection
Default setting: off. When this setting is ‘on’, the bulk charging time is limited to 10 hours. A longer charging time could indicate a
system error (e.g. a battery cell short-circuit).
AC input current limit
These are the current limit settings at which PowerControl and PowerAssist come into operation. The factory setting is 30A.
See Section 2, the book 'Energy Unlimited', or the many descriptions of this unique feature on our website
www.victronenergy.com .
Remark: lowest allowable current setting for PowerAssist: 4,4A.
(4,4A per unit in case of parallel operation)
UPS feature
If this setting is ‘on’ and AC on the input fails, the MultiPlus switches to inverter operation practically without interruption. The
MultiPlus can therefore be used as an Uninterruptible Power Supply (UPS) for sensitive equipment such as computers or
communication systems. The output voltage of some small generator sets is too unstable and distorted for using this setting* –
the MultiPlus would continually switch to inverter operation. For this reason, the setting can be turned off. The MultiPlus will then
respond less quickly to AC input voltage deviations. The switchover time to inverter operation is consequently slightly longer, but
most equipment (most computers, clocks or household equipment) is not adversely impacted. Recommendation: Turn the UPS
feature off if the MultiPlus fails to synchronise, or continually switches back to inverter operation.
*In general, the UPS setting can be left ‘on’ if the MultiPlus is connected to a generator with a ‘synchronous AVR regulated
alternator’.
The UPS mode may have to be set to ‘off’ if the MultiPlus is connected to a generator with a ‘synchronous capacitor regulated
alternator’ or an asynchronous alternator.
Dynamic current limiter
Intended for generators, the AC voltage being generated by means of a static inverter (so-called ‘inverter’ generators). In these
generators, rpm is down-controlled if the load is low: this reduces noise, fuel consumption and pollution. A disadvantage is that
the output voltage will drop severely or even completely fail in the event of a sudden load increase.
More load can only be supplied after the engine is up to speed.
If this setting is ‘on’, the MultiPlus will reduce charge current until the set current limit is reached. This allows the generator engine
to get up to speed.
This setting is also often used for ‘classic’ generators that respond slowly to sudden load variation.
WeakAC
Strong distortion of the input voltage can result in the charger hardly operating or not operating at all. If WeakAC is set, the
charger will also accept a strongly distorted voltage, at the cost of greater distortion of the input current.
Recommendation: Turn WeakAC on if the charger is hardly charging or not charging at all (which is quite rare!). Also turn on the
dynamic current limiter simultaneously and reduce the maximum charging current to prevent overloading the generator if
necessary.
BoostFactor
Change this setting only after consulting with Victron Energy or with an engineer trained by Victron Energy!
Programmable relay
By default, the programmable relay is set as an alarm relay, i.e. the relay will de-energise in the event of an alarm or a pre-alarm
(inverter almost too hot, ripple on the input almost too high, battery voltage almost too low).
VEConfigure software
With VEConfigure software the relay can also be programmed for other purposes, for example to provide a generator starting
signal.
5.3. Configuration of the MultiPlus
The following hardware is required:
MultiPlus 2kVA 120V
Page 11 Configuration

A MK3-USB (VE.Bus to USB) interface.
Alternatively, the Interface MK2.2b (VE.Bus to RS232) can be used (RJ45 UTP cable needed).
5.3.1. VE.Bus Quick Configure Setup
VE.Bus Quick Configure Setup is a software program with which systems with a maximum of three MultiPlusses (parallel or
three phase operation) can be configured in a simple manner. The software can be downloaded free of charge at
www.victronenergy.com.
5.3.2. VE.Bus System Configurator
For configuring advanced applications and/or systems with four or more MultiPlusses, VE.Bus System Configurator software
must be used. The software can be downloaded free of charge at www.victronenergy.com
5.4. Configuration with DIP switches
Some settings can be changed with DIP switches.
Procedure:
a) Turn the MultiPlus on, preferably without load and without AC voltage on the input. The MultiPlus will then operate in inverter
mode.
b) Set the DIP switches as required.
c) Store the settings by toggling DIP switch 3 one time.
5.4.1. DIP switch 1 to 3
These DIP switches can be used to set:
• Battery charge voltage and Absorption time
• Search mode
Ds1-ds2: Setting the charge algorithm (For more system settings use VEConfigure)
Ds1-ds2 Absorption
voltage
Float voltage Storage
Voltage
Absorption
Time (hours)
Suitable for
Ds1=off
Ds2=off
(default)
14.4
28.8
57.6
13.8
27.6
55.2
13.2
26.4
52.8
8 Gel Victron Deep Discharge
Gel Exide A200
AGM Victron Deep Discharge
Ds1=on
Ds2=off
14.1
28.2
56.4
13.8
27.6
55.2
13.2
26.4
52.8
8 Gel Victron Long Life (OPzV)
Gel Exide A600 (OPzV)
Gel MK battery
Li-ion (LiFePO4)
Ds1=off
Ds2=on
14.7
29.4
58.8
13.8
27.6
55.2
13.2
26.4
52.8
5 AGM Victron Deep Discharge
Tubular plate or
OPzS batteries in semi-float
mode AGM spiral cell
Ds1=on
Ds2=on
15.0
30.0
60.0
13.8
27.6
55.2
13.2
26.4
52.8
6 Tubular plate or
OPzS batteries in cyclic mode
DS3 double function.
Ds3: Search Mode and store off = off on = on
Store the settings by toggling DIP switch 3 one time.
5.4.2. Exemplary settings
Example 1 is the factory setting (since factory settings are entered by computer, all DIP switches of a new product are set to ‘off’).
MultiPlus 2kVA 120V
Page 12 Configuration

DS-1
Charge
voltage
off
DS-2
Charge
voltage
off
DS-3
Charge
voltage
off
DS-1 off
DS-2 on
DS-2 off
DS-1 on
DS-2 on
DS-3 on
Example 1: (factory setting)
1.2 GEL 14.4 V
3 Search mode off
3 Store setting: off→ on→ off
Example 2
1.2 Gel Victron Long Life
Li-ion (LiFePO4)
3 Search mode off
3 Store setting: off→ on→ off
Example 3
1.2 Tubular plate 15V
3 Search mode off
3 Store setting: off→ on→ off
Store the settings by toggling DIP switch 3 one time.
The LEDs ‘charger’ and ‘alarm’ will flash to indicate acceptance of the settings.
MultiPlus 2kVA 120V
Page 13 Configuration

6. Maintenance
The MultiPlus does not require specific maintenance. It will suffice to check all connections once a year. Avoid moisture and oil/
soot/vapours, and keep the device clean.
MultiPlus 2kVA 120V
Page 14 Maintenance

7. Trouble Shooting Table
Proceed as follows for quick detection of common faults.
DC loads must be disconnected from the batteries and the AC loads must be disconnected from the inverter before the inverter
and/or battery charger is tested.
Consult your Victron Energy dealer if the fault cannot be resolved.
Problem Cause Solution
The inverter fails to operate
when switched on
The battery voltage is too high or too
low
Ensure that the battery voltage is within the
correct value.
The inverter fails to operate Processor in no function-mode Disconnect mains voltage. Switch front switch
off, wait 4 seconds.
Switch front switch on.
The alarm LED flashes Pre-alarm alt. 1. The DC input voltage
is low
Charge the battery or check the battery
connections.
The alarm LED flashes Pre-alarm alt. 2. The ambient
temperature is too high
Place the inverter in a cool and well-ventilated
room, or reduce the load.
The alarm LED flashes Pre-alarm alt. 3. The load on the
inverter is higher than the nominal load
Reduce the load.
The alarm LED flashes Pre-alarm alt. 4. Voltage ripple on the
DC input exceeds 1.25Vrms
Check the battery cables and terminals.
Check the battery capacity; increase if
necessary.
The alarm LED flashes
intermittantly
Pre-alarm alt. 5. Low battery voltage
and excessive load
Charge the batteries, reduce the load or install
batteries with a higher capacity. Use shorter
and/or thicker battery cables.
The alarm LED is on The inverter did cut out following a pre-
alarm
Check the table for the appropriate course of
action.
The charger is not
functioning
The AC input voltage or frequency is
out of range
Ensure that the input voltage is between
185Vac and 265Vac, and that the frequency
matches the setting.
The battery is not being
charged fully
Incorrect charging current Set the charging current at between 0.1 and
0.2x battery capacity.
A defective battery connection Check the battery terminals.
The absorption voltage has been set to
an incorrect value
Adjust the absorption voltage to the correct
value.
The float voltage has been set to an
incorrect value
Adjust the float voltage to the correct value.
The internal DC fuse is defective Inverter is damaged.
The battery is overcharged The absorption voltage has been set to
an incorrect value
Adjust the absorption voltage to the correct
value.
The float voltage has been set to an
incorrect value
Adjust the float voltage to the correct value.
A defective battery Replace the battery.
The battery is too small Reduce the charging current or use a battery
with a higher capacity.
The battery is too hot Connect a temperature sensor.
Battery charge current drops
to 0 when the absorption
voltage is reached
Alt. 1: Battery overtemperature (>
50°C)
• Allow battery to cool down
• Place battery in a cool environment
• Check for shorted cells
MultiPlus 2kVA 120V
Page 15 Trouble Shooting Table

Problem Cause Solution
Alt 2: Battery temperature sensor faulty Unplug battery temperature sensor from the
MultiPlus.
Reset the MultiPlus by switching it off, then
wait for 4 seconds and switch it on again.
If the MultiPlus now charges normally, the
battery temperature sensor is faulty and
needs to be replaced.
MultiPlus 2kVA 120V
Page 16 Trouble Shooting Table

8. Technical Data
MultiPlus 12/2000/80
MultiPlus 24/2000/50
MultiPlus 48/2000/25
PowerControl / PowerAssist Yes
Transfer switch 50A
INVERTER
Input voltage range 9,5 – 17V 19 – 33V 38– 66V
Output Output voltage: 120VAC ± 2% Frequency: 60Hz ± 0,1% (1)
Cont. output power at 25°C (3) 2000VA
Cont. output power at 25°C 1600W
Cont. output power at 40°C 1400W
Cont. output power at 65°C 1000W
Peak power 3500W
Maximum efficiency in % 93 / 94 / 95
Zero-load power 10 / 11 / 11W
Zero-load power search mode 3 / 4 / 4W
CHARGER
AC Input Input voltage range: 95-140 VAC
Input frequency: 45 – 65 Hz
Charge voltage 'absorption' 14,4 / 28,8 / 57,6V
Charge voltage 'float' 13,8 / 27,6 / 55,2V
Storage mode 13,2 / 26,4 /52,8V
Charge current house battery (4) 80 / 50 / 25A
Charge current starter battery 1 A (12V and 24V models only)
Battery temperature sensor Yes
GENERAL
Programmable relay (5) Yes
Protection (2) a – g
Common Characteristics Operating temp. range: -40 to +65°C (fan assisted cooling)
Humidity (non-condensing): max 95%
ENCLOSURE
Common Characteristics Material & Colour: Steel/ABS (blue RAL 5012) Protection category: IP 21
Battery-connection M8 bolts
230V AC-connection Screw terminals 13 mm² (6 AWG)
Weight 15,2kg
Dimensions (h x w x d) 506 x 234 x 146 mm
STANDARDS
Safety EN-IEC 60335-1, EN-IEC 60335-2-29, EN 62109-1
Emission / Immunity EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3
IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3
Road vehicles ECE R10-4
MultiPlus 2kVA 120V
Page 17 Technical Data

MultiPlus 12/2000/80
MultiPlus 24/2000/50
MultiPlus 48/2000/25
1) Can be adjusted to 60Hz and to 240V
2) Protection
a. Output short circuit
b. Overload
c. Battery voltage too high
d. Battery voltage too low
e. Temperature too high
f. 230VAC on inverter output
g. Input voltage ripple too high
3) Non-linear load, crest factor 3:1
4) At 25°C ambient
5) Programmable relay which can be set for:
general alarm, DC under voltage or generator start/stop signal function
AC rating: 230V/4A
DC rating: 4A up to 35VDC, 1A up to 60VDC
MultiPlus 2kVA 120V
Page 18 Technical Data