The Perfect Combination Battery Charger/Inverter

Why is it a good idea to have an inverter/charger like the Victron Multiplus?

Besides the technical advantages that we’ll discuss below it takes up less space and reduces complexity of installation by combining these two important items into one enclosure and making communication between the two much simpler. The Victron MultiPlus 12/3000/120 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 compact enclosure. Next, to these primary functions, the MultiPlus has several advanced features, as outlined below. (click on image for specs and price)


The Perfect Combination Battery Charger/Inverter

Simple Configuration

After installation, the MultiPlus is ready to go. If settings have to be changed, this can be done in a matter of minutes with a DIP switch setting procedure. Even parallel and 3-phase operation can be programmed with DIP switches: no computer needed! Alternatively, VE.Net can be used instead of the DIP switches. And sophisticated software (VE.Bus Quick Configure and VE.Bus System Configurator) is available to configure several new, advanced, features. All the features of a sine wave inverter and charger in one compact enclosure. UPS functionality with a seamless transfer from external AC to inverter supply. This new model is more compact in size and features a 50-amp transfer switch. Ideal for marine or alternative energy installations.

Four stage adaptive charger and dual bank battery charging

The main output provides a powerful charge to the battery system by means of advanced ‘adaptive charge’ software. The software fine-tunes the three-stage automatic process to suit the condition of the battery and adds a fourth stage for long periods of float charging. In addition to this, the MultiPlus will charge a second battery bank using an independent trickle charge output intended for the main engine or generator starter battery.

PowerAssist - Boost the capacity of shore or generator power

This feature takes the principle of PowerControl to a further dimension. It allows the MultiPlus to supplement the capacity of the alternative source. Where peak power is so often required only for a limited period, the Victron MultiPlus will make sure that insufficient shore or generator power is immediately compensated for by power from the battery. When the load reduces, the spare power is used to recharge the battery.

PowerControl - Dealing with limited shoreside, generator or grid power

The Victron MultiPlus is a very powerful battery charger. It will therefore draw a lot of current from the generator or shore side supply (nearly 20 A per 3 kVA MultiPlus at 120 VAC). With the 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.

Split phase options

Two units can be stacked to provide 120-0-120 V, and additional units can be paralleled up to a total of 6 units per phase, to supply up to 30 kW / 36 kVA of split phase power. Alternatively, a split phase AC source can be obtained by connecting our autotransformer (see data sheet on to a ‘European’ inverter programmed to supply 240 V / 60 Hz.

Three phase capabilities

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

Why Two AC Outputs?

The main output has no-break functionality. The Victron MultiPlus takes over the supply to the connected loads in the event of a grid failure or when shore-/generator power is disconnected. This happens so fast (less than 20 milliseconds) that computers and other electronic equipment will continue to operate without disruption. The second output is live only when AC is available on the input of the MultiPlus. Loads that should not discharge the battery, like a water heater, for example, can be connected to this output (second output available on models rated at 3kVA and more).

Parallel operation means Virtually unlimited power

Up to six Multis can operate in parallel to achieve higher power output. Six 24/3000/70 units, for example, provide 15kW / 18kVA output power with 420 Amps of charging capacity.

Because of its versatility, durability, easy installation, and quality the Victron Multiplus is the Gold standard for marine and off-grid energy systems.

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