Victron Energy Products

Victron Energy Products – MultiPlus, Quattro: what are the differences?

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Victron Energy, founded in 1975 by Reinout Vader, designs, manufactures and sells power conversion equipment. Without going into too much detail, Victron Energy’s products enable energy independence regardless of the application.

For this purpose, several inverters exist, including the MultiPlus and Quattro ranges. What are the differences?


On we can read:

As its name suggests, the MultiPlus is a device combining a converter and a charger in a single box. Among its many functions, it includes a pure sine wave converter, an adaptive load, a hybrid PowerAssist technology, as well as multiple system integration functions.

Among its many functions, we find:


  1. Two AC outputs

The main output has an uninterrupted power function. In case of network failure or disconnection of the shore power or the group, the MultiPlus takes over the supply of connected loads. This transfer is so fast (less than 20 milliseconds) that the operation of computers or other sensitive electronic equipment connected will not be disturbed. The second output is energized only when AC power is available at the MultiPlus input. Charges that would not discharge the battery, such as a water heater for example, can be connected to this output (second output available on models of 3 kVA and more).


  1. Virtually unlimited power thanks to parallel operation

Up to 6 Multi can operate in parallel to get more power output. For example, six 24/3000/70 units will provide 15 kW / 18 kVA output and 420 A load capacity.


  1. Three phase configuration

In addition to the parallel connection, three units can be configured for three-phase output. But that’s not all: with three chains of six units in parallel, a 45 kW / 54 kVA three-phase converter and a 1260 A charger can be installed.


  1. Half-phase options

Two units can be stacked to provide 120-0-120V, and additional units can be connected in parallel to a total of 6 units per phase to power up to 30kW / 36kVA of half power supply phase. Otherwise, a half-phase AC source can be obtained by connecting our autotransformer (see data sheet on to a “European” converter programmed to power 240 V / 60 Hz.


  1. PowerControl: adapt to the limits of a group, the dock or the sector

The MultiPlus features a very powerful battery charger that requires intensive intensities at shore or generator connections (around 20 from 3 kVA to 120 VAC). The control panel Multi Control limits the power to be supplied by the dock or the generator. The MultiPlus then considers the other AC loads and is not used for the charge, thus avoiding any overload of the battery or the generator.


  1. PowerAssist – More power provided by the dock or the group

This function adds an extra dimension to the PowerControl principle by allowing the MultiPlus to supplement the capacity of the alternative source. In the event of a peak power demand, often required for a short period of time, the MultiPlus will ensure that insufficient generator or dock power will be compensated for by additional power from the battery. And when the demand goes down, the excess power is used to recharge the batteries.


  1. Adaptive charging in four steps and charging of two banks of batteries

The main output provides a powerful charge to the battery system through advanced “adaptive load” software. The software adjusts the three steps of the automatic process to fit the battery condition and adds a fourth for long float charging periods. The adaptive charging process is detailed in the Phoenix Charger datasheet and on our website in the Technical Information section. In addition, the MultiPlus will charge a second battery using a compensation charge output provided for a main engine or a generator starter battery.


  1. System configuration has never been easier

Once installed, the MultiPlus is ready for use. If parameters need to be changed, this is done in a few minutes with a procedure for setting DIP switches. Even parallel or three-phase operation can be programmed with DIP switches: no computer is needed! Otherwise, VE.Net can be used instead of the DIP switches. Sophisticated software (VE.Bus Quick Configure and VE.Bus System Configurator) are available to configure several new and advanced features.



Like the MultiPlus, the Quattro also combines a converter and charger assembly. In addition, it can accommodate two AC inputs and automatically connect the active source. Among its many functions, it includes a pure sine wave converter, an adaptive load, a hybrid PowerAssist technology, as well as multiple system integration functions such as three-phase, split-phase and parallel operation.

So, in summary, the Quattro has 2 Alternating Current inputs, allowing for example to connect to Hydro and a backup generator.

The Quattro also comes in addition to models offering power up to 10 kVA output 120 Vac.



As indicated in the previous paragraph, the major technical difference between the MultiPlus and the Quattro is the number of Alternating Current inputs.

Another big difference is the two products: The 3000W version of the MultiPlus is certified UL1741 and CSA C22.2, and can therefore be installed on installations connected to the Hydro Quebec network.


By Ronan Le Guillouzic