Multiplus Inverter Owner's Manual

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 BatterySafe 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 4A 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.
• Battery voltage sense: the correct charge voltage: Voltage loss due to cable resistance can be compensated by using the voltage sense facility to measure voltage directly on the DC bus or on the battery terminals.
• 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 our website.

Self consumption – solar energy storage systems

For more information see our white paper Self Consumption or Grid independence with the Victron Energy Storage Hub. The appropriate software can be downloaded from our website.

When the Multi/Quattro 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. This way the Multi/Quattro can comply to the local rules. 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 Multi/Quattro an external certified interface device should be used to connect the Multi/Quattro to the grid.

The Multi/Quattro can also be used as a bidirectional inverter operating parallel to the grid, integrated into a customer designed system (PLC or other) that takes care of the control-loop and grid measurement, see http://www.victronenergy.com/live/sy..._grid_parallel

Special note for Australian customers: IEC62109.1 certification and CEC approval for off-grid use does NOT imply approval for gridinteractive 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.

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 "mains on" LED will light up and the charger commences charging. The "bulk", "absorption" or "float" LEDs will light up, depending on the charger mode. If the voltage at the "AC-in" terminal is rejected, the inverter will switch on. When the switch is switched to "charger only", only the battery charger of the Multi will operate (if mains voltage is present). In this mode input voltage also is switched through to the "AC out" terminal.

Remote control 

Remote control is possible with a 3-way 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 and PowerAssist in Section 2.

Equalisation and forced absorption

• Equalisation: Traction batteries require regular additional charging. In the equalisation mode, the MultiPlus will charge with increased voltage for one hour (1V above the absorption voltage for a 12V battery, 2V for a 24V battery). The charging current is then limited to 1/4 of the set value. The “bulk” and “absorption” LEDs flash intermittently.

• Forced absorption: Under certain circumstances, it can be desirable to charge the battery for a fixed time at absorption voltage level. In Forced Absorption mode, the MultiPlus will charge at the normal absorption voltage level during the set maximum absorption time. The “absorption” LED lights.
• Activating equalisation or forced absorption: The MultiPlus can be put into both these states from the remote panel as well as with the front panel switch, provided that all switches (front, remote and panel) are set to “on” and no switches are set to “charger only”. In order to put the MultiPlus in this state, the procedure below should be followed. If the switch is not in the required position after following this procedure, it can be switched over quickly once. This will not change the charging state.

Procedure:

1. Check whether all switches (i.e. front switch, remote switch or remote panel switch if present) are in the “on” position.
2. Activating equalisation or forced absorption is only meaningful if the normal charging cycle is completed (charger is in 'Float').
3. To activate:

• Switch rapidly from “on” to “charger only” and leave the switch in this position for ½ to 2 seconds.
• Switch rapidly back from “charger only” to “on” and leave the switch in this position for ½ to 2 seconds.
• Switch once more rapidly from “on” to “charger only” and leave the switch in this position.

4. On the MultiPlus (and, if connected, on the MultiControl panel) the three LEDs “Bulk”, “Absorption” and “Float” will now flash 5 times.
5. Subsequently, the LEDs “Bulk”, “Absorption” and “Float” will each light during 2 seconds.

• If the switch is set to “on” while the “Bulk” LED lights, the charger will switch to equalisation.
• If the switch is set to “on” while the “Absorption” LED lights, the charger will switch to forced absorption.
• If the switch is set to “on” after the three LED sequence has finished, the charger will switch to “Float”.
• If the switch has not been moved, the MultiPlus will remain in ‘charger only’ mode and switch to “Float”.

LED Indications

Inverter
The inverter is on and supplies power to the load.	The nominal output of the inverter is exceeded. The “overload” LED flashes
The inverter is switched off due to overload or short circuit.	The battery is almost fully exhausted.
The inverter has switched off due to low battery voltage.	The internal temperature is reaching a critical level.
The inverter has switched off due to the electronics temperature being too high.	If the LEDs are flashing alternately, the battery is nearly exhausted and the nominal output is exceeded. If "overload" and "low battery" flash simultaneously, the ripple voltage on the battery terminals is too high.
The inverter switched off due to excess ripple voltage on the battery terminals.
Battery Charger
The AC input voltage is switched through and the charger operates in bulk mode.	The mains voltage is switched through and the charger is on. The set absorption voltage, however, has not yet been reached. (BatterySafe mode)
The mains voltage is switched through and the charger operates in absorption mode.	The mains voltage is switched through and the charger operates in float mode.
The mains voltage is switched through and the charger operates in equalize mode.
Special Indications
The AC input is switched through. The AC output current is equal to the preset maximum input current. The charge current is reduced to 0.	The AC input is switched through but the load requires more current than the preset maximum input current. The inverter is switched on to supply the required additional current.

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.

Excessively high ambient temperature will result in the following:

• Reduced service life.
• Reduced charging current.
• Reduced peak capacity, or shutdown of the inverter.
• Never position the appliance directly above the batteries.

The MultiPlus is suitable for wall mounting. For mounting purposes, a hook and two holes are provided at the back of the casing (see appendix G). The device can be fitted either horizontally or vertically. For optimal cooling, vertical fitting is preferred. Try and keep the distance between the product and the battery to a minimum in order to minimize cable voltage loss.

Connection of battery cables

In order to utilize the full capacity of the product, batteries with sufficient capacity and battery cables with sufficient cross section should be used. See table.

Procedure

Proceed as follows to connect the battery cables:

• Undo the four screws at the front of the enclosure and remove the front panel.
• Connect the battery cables: see Appendix A.
• Tighten the nuts well for minimal contact resistance.

Connection of the AC cabling

The MultiPlus is a safety class I product (supplied with a ground terminal for safety purposes). Its AC input and/or output terminals and/or grounding point on the outside of the product must be provided with an uninterruptible grounding point for safety purposes.

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, an 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 (for example, with a shore current plug), 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 terminal blocks can be found on the printed circuit board, see Appendix A. The shore or mains cable must be connected to the Multi with the aid of a three-wire cable.

Recommended torque: 1,6 Nm

• AC-in (see appendix A) The AC input cable can be connected to the terminal block “AC–in”. From left to right: “PE” (earth), “N” (neutral) and “L” (phase). The AC input must be protected by a fuse or magnetic circuit breaker rated at 50A or less, 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-1 (see appendix A) The AC output cable can be connected directly to the terminal block "AC-out". From left to right: “PE” (earth), “N” (neutral) and “L” (phase). With its PowerAssist feature the Multi can add up to 3kVA (that is 3000 / 120 = 25A) 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 + 25 = 75A. 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. The maximum rating of the fuse or circuit breaker is 75A.
• AC-out-2 (see appendix A) A second output is available that disconnects its load in the event of battery operation. On these terminals, equipment is connected that may only operate if AC voltage is available on AC-in, e.g. an electric boiler or an air conditioner. The load on AC-out-2 is disconnected immediately when the MultiPlus switches to battery operation. After AC power becomes available on AC-in, the load on AC-out-2 will be reconnected with a delay of approximately 2 minutes. This to allow a genset to stabilise. AC-out-2 can support loads of up to 25A. An earth leakage circuit breaker and fuse rated at max. 32A must be connected in series with AC-out-2.

Optional Connections

A number of optional connections are possible:

• Second Battery: The MultiPlus has a connection for charging a starter battery. For connection see Appendix A.
• Voltage Sense: For compensating possible cable losses during charging, two sense wires can be connected with which the voltage directly on the battery or on the positive and negative distribution points can be measured. Use wire with a cross-section of 0,75mm². During battery charging, the MultiPlus will compensate the voltage drop over the DC cables up to a maximum of 1 Volt (i.e. 1V over the positive connection and 1V over the negative connection). If the voltage drop threatens to become larger than 1V, the charging current is limited in such a way that the voltage drop remains limited to 1V.
• Temperature Sensor: The temperature sensor supplied with the product may be used for temperature-compensated charging (see Appendix A). The sensor is isolated and must be mounted on the batteries minus pole.
• Remote Control: The product can be remotely controlled in two ways.
  • With an external switch (connection terminal H, see appendix A). Operates only if the switch on the MultiPlus is set to “on”.
  • With a Multi Control panel (connected to one of the two RJ48 sockets B, see appendix A). Operates only if the switch on the MultiPlus is set to “on”.
• Programmable relays: The relays can be programmed for all kinds of applications, for example as a starter relay for a generating set.
• Programmable analog/digital input/output ports: These ports can be used for several purposes. One application is communication with the BMS of a lithium-ion battery.
• Auxiliary AC output (AC-out-2): Besides the usual uninterruptable output, a second output (AC-out-2) is available that disconnects its load in the event of battery operation. Example: an electric boiler or air conditioner that is allowed to operate only if the genset is running or shore power is available. In case of battery operation, AC-out-2 is switched off immediately. After the AC supply has become available, AC-out-2 is reconnected with a delay of 2 minutes, this to allow a genset to stabilise prior to connecting a heavy load.
• Parallel Connection: 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 Multis plus optional control panel) will require subsequent configuration (see Section 5). 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 10cm for ventilation purposes under, above and beside the units.
  • UTP cables must be connected directly from one unit to the other (and to the remote panel). Connection/splitter boxes are not permitted.
  • 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.
  • Voltage sensing must be connected to the master (see Section 5.5.1.4).
  • Only one remote control means (panel or switch) can be connected to the system.
• Three-phase operation: 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 (Multis plus an optional control panel) will require subsequently configuration (see Section 5).

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: 50Hz; 60Hz
• Input frequency range
  • 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; 45 – 55Hz; 55 – 65Hz
• 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 by stacking (only for MultiPlus units with 120V output voltage)
    • create a split-phase system with a separate autotransformer: see VE autotransformer datasheet and manual
    • create a 3-phase system.
  • The standard product settings are for standalone operation. For parallel, three phase or split phase operation see sections 5.3 / 5.4 and 5.5.
• AES (Automatic Economy Switch)
  • 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. Applicable in stand-alone configuration only.
• Search Mode
  • Instead of the AES mode, the search mode can also be chosen (with help of VEConfigure only). 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. The 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) Not adjustable with DIP switches. Applicable in stand-alone configuration only.
• 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, see appendix A. Not adjustable with DIP switches.
    • Models with 50A transfer capacity only: if required an external ground relay can be connected (for a split-phase system with a separate autotransformer). See appendix A.
• Battery charge curve
  • The standard setting is ‘Four-stage adaptive with BatterySafe mode’. See Section 2 for a description. This is the best charging characteristic. See the help files in the software configuration programs for other features. ‘Fixed’ mode can be selected with DIP switches.
• 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 open batteries. Four charging voltages can be set with DIP switches. With VEConfigure the charge curve can be adjusted to charge any battery type (Nickel Cadmium batteries, Lithium-ion batteries)
• Automatic equalisation charging
  • This setting is intended for flooded tubular plate traction or OPzS 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. Not adjustable with DIP switches. See ’tubular plate traction battery charge curve’ in VEConfigure.
• 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 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. Not adjustable with DIP switches.
• Bulk Protection
  • 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). Not adjustable with DIP switches.
• AC input current limit
  • These are the current limit settings for which PowerControl and PowerAssist come into operation. PowerAssit setting range: From 7,5A* to 50A. Factory setting: the maximum value (50A).
• AC input current limit
  • These are the current limit settings for which PowerControl and PowerAssist come into operation. PowerAssit setting range: From 5,3A to 50A for models with 50A transfer capacity Factory setting: the maximum value (50A).
• 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.
• 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 start supplying extra power at a low generator output level and gradually allow the generator to supply more, until the set current limit is reached. This allows the generator engine to get up to speed. This setting is also often used for ‘classical’ 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. Note: when WeakAC is on, the maximum charge current is reduced by approximately 20%. Not adjustable with DIP switches.
• BoostFactor
  • Change this setting only after consulting with Victron Energy or with an engineer trained by Victron Energy! Not adjustable with DIP switches.
• Three programmable relays
  • The MultiPlus is equipped with 3 programmable relays. The relays can be programmed for all kinds of other applications, for example as a starter relay for a generating set. The default setting of the relay in postion I (see appendix A, upper right corner) is ‘alarm’. Not adjustable with DIP switches.
• Auxiliary AC output (AC-out-2)
  • Besides the uninterruptable output, a second output (AC-out-2) is available that disconnects its load in the event of battery operation. Example: an electric boiler or air conditioner that is allowed to operate only if the genset is running or shore power is available. In case of battery operation, AC-out-2 is switched off immediately. After the AC supply has become available, AC-out-2 is reconnected with a delay of 2 minutes, this to allow a genset to stabilise prior to connecting a heavy load.

Configuration by computer

All settings can be changed by means of a computer or with a VE.Net panel (except for the multi-functional relay and the VirtualSwitch when using VE.Net). The most common settings can be changed by means of DIP switches (see Section 5.5).

For changing settings with the computer, the following is required:

• VEConfigure3 software: can be downloaded free of charge at www.victronenergy.com.
• A MK3-USB (VE.Bus to USB) interface, and a RJ45 UTP cable. Alternatively, the Interface MK2.2b (VE.Bus to RS232) and a RJ45 UTP cable can be used.

VE.Bus Quick Configure Setup

• VE.Bus Quick Configure Setup is a software program with which systems with a maximum of three Multis (parallel or three phase operation) can be configured in a simple manner. VEConfigure3 forms part of this program. The software can be downloaded free of charge at www.victronenergy.com.

VE.Bus System Configurator

• For configuring advanced applications and/or systems with four or more Multis, VE.Bus System Configurator software must be used. The software can be downloaded free of charge at www.victronenergy.com . VEConfigure3 forms part of this program.

More software

• Several other software tools are available:
  • Assitants: to configure Multis and Quattros for particular applications (such as self-consumption applications).
  • apps: to help managing and monitoring a system with a smart phone or tablet (see Support►Software on our website, ColorControl panel needed).
  • VRM (Victron Remote Monitoring website): numerical and graphical display of system parameters and history (ColorControl or Venux GX needed).
  • Remote VE Configure: to configure or change settings of a system remotely (ColorControl or Venus GX needed).
  • The Multi/Quattro can also be used as a bidirectional inverter operating parallel to the grid, integrated into a customer designed system (PLC or other) that takes care of the control-loop and grid measurement, see http://www.victronenergy.com/live/sy..._grid_parallel

Configuration with a VE.Net panel

• To this end, a VE.Net panel and the VE.Net to VE.Bus converter is required. With VE.Net all parameters are accessible, with the exception of the multi-functional relay and the VirtualSwitch.

Configuration with DIP switches

A number of settings can be changed using DIP switches (see appendix A, position M).

A note on used terminology: A system in which more than one Multi is used to create a single AC phase is called a parallel system. In this case one of the Multis will control the whole phase, this one is called the master. The others, called slaves, will just listen to the master to determine their action.

It is also possible to create more AC phases (split-phase or 3-phase) with 2 or 3 Multis. In this case the Multi in phase L1 is called the Leader. The Multis in phase L2 (and L3 if available) will generate the same AC frequency but will follow L1 with a fixed phase shift. These Multis are called followers.

If more Multis are used per phase in a split-phase or 3-phase system (for instance 6 Multis used to build a 3-phase system with 2 Multis per phase) then the Leader of the system is also the Master of phase L1. The Followers in phase L2 and L3 will also take the Master role in phase L2 and L3. All others will be slaves.

Setting up parallel or split-phase/3-phase systems should be done by software, see paragraph 5.3.

General procedure: Turn the Multi on, preferably without load and without AC voltage on the input. The Multi will then operate in inverter mode.

• Step 1: Set the DIP switches for:
  • the required current limitation of the AC input (not relevant for slaves)
  • AES (Automatic Economy Switch) (only relevant in systems with 1 Multi per phase)
  • limitation of the charging current (only relevant for Master/Leader)

Press the 'Up' button for 2 seconds (upper button to the right of the DIP switches, see appendix A, position K) to store the settings after the required values have been set. You can now re-use the DIP switches to apply the remaining settings (step 2).

• Step 2: other settings, set the dipswitches for:
  • Charge voltages (only relevant for Master/Leader)
  • Absorption time (only relevant for Master/Leader)
  • Adaptive charging (only relevant for Master/Leader)
  • Dynamic current limiter (not relevant for slaves)
  • UPS function (not relevant for slaves)
  • converter voltage (not relevant for slaves)
  • converter frequency (only relevant for Master/Leader)

Press the 'Down' button for 2 seconds (lower button to the right of the DIP switches) to store the settings after the DIP switches have been set in the correct position. You can now leave the DIP switches in the selected positions, so that the ’other settings’ can always be recovered.

Remarks: The DIP switch functions are described in 'top to bottom' order. Since the uppermost DIP switch has the highest number (8), descriptions start with the switch numbered 8. For parallel or 3-phase mode, read the whole setting procedure and make a note of the required DIP switch settings before actually implementing them.

VE.Bus LED indications

Equipment included in a VE.Bus system (a parallel or 3-phase arrangement) can provide so-called VE.Bus LED indications. These LED indications can be subdivided into two groups: OK codes and error codes.

VE.Bus OK codes

If the internal status of a device is in order but the device cannot yet be started because one or more other devices in the system indicate an error status, the devices that are in order will indicate an OK code. This facilitates error tracing in a VE.Bus system, since devices not requiring attention are easily identified as such.

• A flashing "bulk" LED indicates that the device can perform inverter operation.
• A flashing "float" LED indicates that the device can perform charging operation.

• The special LED indications above can occur together with the OK codes.
• The "low battery" LED can function together with the OK code that indicates that the device can charge.

VE.Bus error codes

A VE.Bus system can display various error codes. These codes are displayed with the "inverter on", "bulk", "absorption" and "float" LEDs.

To interpret a VE.Bus error code correctly, the following procedure should be followed:

1. The device should be in error (no AC output).
2. Is the "inverter on" LED flashing? If not, then there is no VE.Bus error code.
3. If one or more of the LEDs "bulk", "absorption" or "float" flashes, then this flash must be in phase opposition to the "inverter on" LED, i.e. the flashing LEDs are off if the "inverter on" LED is on, and vice versa. If this is not the case, then there is no VE.Bus error code.
4. Check the "bulk" LED, and determine which of the three tables below should be used.
5. Select the correct column and row (depending on the "absorption" and "float" LEDs), and determine the error code.
6. Determine the meaning of the code in the tables below.

Bulk LED Absorption LED Float LED	Code	Meaning:	Cause/solution:
	1	Device is switched off because one of the other phases in the system has switched off.	Check the failing phase.
	3	Not all, or more than, the expected devices were found in the system.	The system is not properly configured. Reconfigure the system.
			Communication cable error. Check the cables and switch all equipment off, and then on again.
	4	No other device whatsoever detected.	Check the communication cables.
	5	Overvoltage on AC-out.	Check the AC cables.
	10	System time synchronisation problem occurred.	Should not occur in correctly installed equipment. Check the communication cables.
	14	Device cannot transmit data.	Check the communication cables (there may be a short circuit).
	17	One of the devices has assumed ‘master’ status because the original master failed.	Check the failing unit. Check the communication cables.
	18	Overvoltage has occurred.	Check AC cables.
	22	This device cannot function as ‘slave’.	This device is an obsolete and unsuitable model. It should be replaced.
	24	Switch-over system protection initiated.	Should not occur in correctly installed equipment. Switch all equipment off, and then on again. If the problem recurs, check the installation.
	25	Firmware incompatibility. The firmware of one the connected devices is not sufficiently up to date to operate in conjunction with this device.	Switch all equipment off. Switch the device returning this error message on. Switch on all other devices one by one until the error message reoccurs. Update the firmware in the last device that was switched on.
	26	Internal error.	Should not occur. Switch all equipment off, and then on again. Contact Victron Energy if the problem persists.