How to program Victron Inverter/Chargers in 2024

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So, you just bought this expensive and powerful big blue box to power your solar renewable or off-grid application. Well, what’s next? The first step is definitely to put a system together. You can learn how to do it from our Solar power bank wiring post. However, the system must be appropriately configured before commissioning and utilizing it. Therefore, to program Victron inverter/chargers with the correct settings is essential. We believe that our configuration guide will make your journey electrifying. Of course, in a positive sense.


Victron Inverter/Chargers Overview

Victron Multiplus or Quattro inverter/chargers are a great power solution that plays a big part in any off-grid and grid-tied solar systems. It presents distinctive and handy features to meet your energy needs efficiently. Victron Inverter/Charger programming is a breeze due to its user-friendly interface and intuitive configuration. It empowers you to customize and optimize your power system effortlessly to meet your unique requirements. Moreover, Victron inverters excel at converting DC to usable pure sine wave AC power. It can cope with the most sensitive electronics. A built-in charger features an intelligent multi-stage charging algorithm ensuring efficient and proper charging for lithium-ion and lead-acid batteries. Therefore, it is vital to program Victron inverter/chargers with appropriate settings. It will prolong the equipment lifespan, such as expensive batteries, and make off-grid system operation stable throughout the year. Unlock the full potential of your Victron Inverter/Charger through convenient programming.


Vicron Inverter/Chargers features

Power Assist allows the inverter to seamlessly supplement your existing power supply during peak demand while connected to shore power. It ensures a consistent and uninterrupted flow of electricity, regardless of sudden surges in energy usage. The Multiplus inverters can be a reliable, Uninterruptible Power Supply (UPS), safeguarding your critical systems and equipment from power outages or fluctuations. Moreover, this versatile inverter offers virtually unlimited power potential through parallel operation, enabling you to combine multiple units to meet even the most demanding energy requirements. And to top it off, the Multiplus provides convenient Remote Monitoring and Control via Victron cloud, allowing you to monitor and manage your power system from a distance effortlessly. With its innovative technology, the Victron Multiplus inverter is an indispensable and reliable choice for any renewable power system.


System Voltage

When it comes to off-grid inverters, there are a few commonly used voltage options. The most prevalent DC voltages are 12, 24, and 48 VDC. The 12V Victron inverter finds extensive use in smaller devices that a 12V lithium-ion battery bank typically powers. Alternatively, 24V and 48V inverters are commonly employed in larger off-grid applications and home energy systems. If you’re unsure about which system voltage to choose, consider the following guidelines: for a solar array up to 1000W, opt for a 12V system; if the solar array falls within the range of 1000W to 3000W, go with 24V; and if the solar array ranges from 3000W to 6000W, select 48V. Additionally, remember that the size of the loads determines the required DC voltage of the battery bank. Therefore, it is crucial to choose the appropriate model, as a 12V inverter will not function with a 24V battery bank.


Wire Multiplus Units

Important:
Before wiring up inverters, ensure the main DC bus bars are not connected to the power supply and/or batteries. In other words, power up the system upon pre-wiring the components.

Before we proceed to configuration, let’s ensure the wires are hooked up correctly. We expect that you know the significance of correctly connecting the wires, whereby negative cables should be connected to the negative post and positive cables to the positive post of the Multiplus inverter/charger. Avoid reverse polarity! Don’t let the magic smoke to indicate this issue. Here are some helpful tips when wiring:


MPPT SettingsBefore wiring and programming Multiplus inverter/charger, verify all the breakers, both DC and AC are in the off position
MPPT SettingsTorque negative and positive Multiplus battery connections to 11nm
MPPT SettingsTorque all Multiplus AC terminals to 1.6N-m/14.1 Inch Pounds
MPPT SettingsInstall bushings into the pass-throughs on the Victron Multiplus unit

Programming Victron Multiplus

Victron Multiplus programming requires some tools, including PC and Victron apps, to set the proper system parameters. Victron offers a wide range of apps and tools that, at times, make it hard to wrap your head around the configuration process. However, SunnyWell has crafted a step-by-step guide on how to program Victron Multiplus inverter/charger settings quickly.


Required Materials

Victron MK3-USB interface

Use the MK3-USB to connect the following products to a computer for configuration: Multi, MultiGrid, MultiPlus, Quattro inverter/chargers

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Check MK3-USB

For configuring Multiplus or Quattro, Connect the MK3-USB to a laptop with the USB port following by ethernet connection to Multiplus or Quattro. The RJ45 cable connects to any of the two VE.Bus ports on the units. On top of that, you can use any Cat5 or Cat6 regular ethernet cable .

program Victron Inverter/Chargers using MK3-USB interface

What app to use for programming Victron inverter/charger?

There are two apps available for setting up Victron inverter/charger units. Although the VE.Configure app has been more widely used in the past, the Victron Energy team is actively working towards replacing it with the newer Victron Connect software. This transition aims to offer enhanced functionality and a more streamlined user experience. Until recently VictronConnect app has been running only via Bluetooth, however, now it also works vie VE.Bus connection (via MK3-USB interface). On the other hand, it does not have some capabilities of VE.Configure (for example, you can’t change the inverter grid code using VictronConnect or enable Assist function).


Victron inverter/chargers configuration using VictronConnect

VictronConnect software

Now, let’s get you set up with the VictronConnect app. It’s super easy, we promise! Just head over here and download the app first.

Once you install the app, select Victron inverter/charger from the list of available devices. To proceed to settings click on the top right gear. The standard password is zzz.


Before proceeding to any configuration, ensure Victron inverter/charger runs on the latest firmware. To update firmware, find “product info”, then “update” if a firmware update is available.


Multiplus/Quattro General settings programming

Set 60Hz for North American market and 50Hz for the rest of the world. Enable battery monitor toggle if you have the BMV battery monitor installed. Into the “battery capacity”, input the size of the battery bank you have.


Victron Connect General Settings

AC input current limit – set the maximum available AC grid input. For instance, if the maximum shore power capacity is 30A, it is necessary to input this value as the threshold AC input limit.


Current limit overruled by remote – enable if using the Victron Energy Digital Multi Control panel. An AC limiter value will override the AC input current limit parameter configured through VictronConnect.


State of charge when bulk finished – For a lead-acid battery, including sealed and AGM, the value is typically set to 80%, and the Charge efficiency will be between 0.75 or 0.8. For lithium-ion batteries, such as Battler Born or Renogy, the bulk finishes at around 95%, and the Charge efficiency will be approximately 0.97.


Multiplus/Quattro Grid configuration

Keep settings for the 120V as is. For the 230V grid, ensure the lower and higher voltage disconnect threshold is within +-20% range.


Victron Multiplus grid settings

Essential Inverter Programming Settings for Optimal Performance on VictronConnect

When programming Victron inverter/chargers on VictronConnect, the output voltage is essential as it determines the level of electrical power delivered to your devices. Another critical setting that demands attention is the low DC cutoff voltage.


Victron Multiplus or Quattro inverter settings

Inverter output voltage – set the average AC grid ouput. For instance, it must be set at 120V for North America and 230V for the rest of the world .


Ground relay – enable this setting as the system will automatically close or open Neutral to PE depending on the presence of AC input.


DC input low-shutdown – for lead-acid batteries set it to 10.3V. For lithium-ion batteries this value should be around 11V. For 24V and 48V systems, it will be 20.6V and 41.2V for lead-acid power banks, and 22V and 44V for lithium systems accordingly.


DC input low restart and DC input low pre-alarm – we will keep them tied together, therefore, for 12V systems using lead-acid bank, the values should be set to 10.9V, in 24V -> 21.8V, and in 48V -> 43.6V. For 12V systems using lithium bank, the values should be set to 11.3V, in 24V -> 22.6V, and in 48V -> 45.2V


Low SOC shut-down – when setting Victron inverter/chargers, it is important to use the settings to extend battery lifespan. Based on our experience, we recommend using the following values while having lead-acid batteries to shut down at 30% state of charge and reconnect at 38%. On the other hand, the lithium battery bank can withstand a lower threshold at 10% to shut down and 15% to restart.


Maximizing Battery Lifespan: Optimal Victron inverter Charger Settings for Lead-Acid and Lithium Batteries via VictronConnect

Charger current – be aware when setting this value. Higher currents can potentially damage the battery bank. We highly recommend opting for a slower charging rate to prevent irreversible damage to the battery storage. As a general guideline, it is crucial to avoid charging lead-acid batteries at a rate higher than 0.2 times the battery’s capacity (0.2C) under any circumstances. For instance, if your battery bank has a total of 400Ah, the charging rate should not exceed 80A (considering all other charging sources as well) If your solar system incorporates a 20A MPPT charge controller, we suggest setting the inverter charging rate to 60A. Additionally, we encourage you to review our article on Victron MPPT charging settings for different power banks.


Program Victron Inverter/Chargers in 120V/240V Split Phase for North America

Firstly, you will need to install VE.Bus System Configurator (on PC only or PC Emulator on Mac) to program two Multiplus or Quattor in the 120/240V Split Phase.


Step 1

Keep inverters off. Interconnect inverter/chargers using a manufactured RJ45 cable and VE.Bus port.


Step 2

Ensure no other accessories are connected to the inverter/chargers (including Digital Multi Control, Cerbo GX, VE). Bus Smart Dongle)


Step 3

Turn on both inverter/chargers units at the same time or in close proximity.


Step 4

Connect MK3-USB adapter with VE.Bus port from one inverter/charger (choose any) to your computer.


Step 5

Run through VictronConnect tool with keeping defaults as is. As you open the application it should detect inverters automatically, if it doesn’t, click “Refresh” Button in the bottom right corner.

Step 6

After running Rerfresh, one of the inverter/chargers should appear in the main screen. Select the inverter from the device list


Step 7

Once it’s connected Victron should detect that there are two inverters in the system. It will prompt to the window below. Click “Next”.


Victron split phase programming

Step 8

In order to proceed for configuration of Victron inverter/charger, you will need to insert the password. The default password should be zzz. Proceed to the next page.

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Step 9

Ensure the inverter/chargers are in daisy chain using Cat5 cables. Switch ON all the units.


Step 10

After detecting two inverter if you look at the icons at the top. Program Victron inverter/chargers in split phase 180 degrees. This is what it will give us 120/240V split-phase system used in North America. Click “Next”.


Program Victron inverter/chargers in split phase 180 degrees

Step 11

The next step might ask you to update the inverter. You should update them you haven’t done it yet.


Step 12

In the next step you should assign the inverter to the correct phase. The order doesn’t matter, either of them can be assigned to Phase 1 or Phase 2. Check which unit has the LEDs blinking and assign to the phase.


Victron assigning the inverter/charger to the correct phase in split phase system

Step 13

After assigning phases, the VE.Bus split-phase configuration should be done.


the VE.Bus split-phase configuration

Step 14

At this point both inverters should be in the ON mode. Measure the voltage on the outputs of both inverters should be 120V and between the hot legs of the inverters it should 240V.


FAQ

What is the difference between MultiPlus and MultiPlus-II?

The Multiplus II is essentially identical to the regular Multiplus, except for its dual AC input disconnect relays. These relays ensure compliance with grid code standards for grid feedback. However, if grid feedback isn’t necessary, both models are virtually indistinguishable. It allows you to choose the Multiplus II for grid-tied purposes or stick with the standard Multiplus, depending on your specific requirements.

Does Victron Multiplus or Quattro have Bluetooth?

The Multiplus or Quattro inverter doesn’t come with Bluetooth. Therefore, for configuring some usefull Victron Multiplus parameters on the phone, you will need to purchase VE.Direct Bluetooth Smart dongle


Author

  • Vlad Vakulenko

    Hey, I'm Vlad, a Renewable Energy expert with 7+ years in solar battery storage and EV charging. At SunnyWell Energy, I'm sharing top industry knowledge and practical expertise. My goal is to help both DIY enthusiasts and professionals make the most of this valuable information.

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