Victron Energy MultiPlus-II 24/3000/70-50 2x120V 24VDC 120VAC 3000W Inverter 70A Charger

The Multiplus-II 24/3000/120-50 2x120V is a sophisticated 24-Volt 3000-Watt pure sine wave inverter with an adaptive 70A battery charger and a high-speed 50A transfer switch. A UL-certified Multiplus-II 2x120V 24V model is also available.

The Multipluls-II 2x120V offers a 240V split-phase 50A pass-through when the power is supplied by an external AC source such as shore power or a generator. The MultiPlus switches to 120V single-phase inverter mode when no AC source is detected. The inverter’s output feeds L1 and L2, so both sides of your electric service panel are powered. Note that the 240V split phase is only available from external sources; this prevents the batteries from being drained by your large loads.

Additionally, in the 2x120V inverter/charger, you will find the great features of the standard Multiplus-II, including PowerControl, PowerAssist, Input Current Limit, double AC outputs, as well as parallel and three-phase configuration for large VE.Bus systems. It is configurable for LiFePO4 batteries and a variety of other battery technologies.

Here is a table with other 24V Multiplus and Multiplus-II inverter models (see difference between Multiplus vs. Multiplus-II below):

Multiplus-II inverters have two AC outputs. The main output features a 20-millisecond no-break transfer switch allowing computers and electronic equipment to operate without interruption in the event the grid or the generator disconnect. By default, the second AC output runs only when an AC input is available; it is intended for non-critical loads that should not discharge the batteries, for example, a water heater. However, the auxiliary AC output can be configured for many other scenarios.

240V Split Phase and 3-Phase Operation

Stack two Multiplus-II inverters to build your 240V split phase system, or configure three inverters for a 3-phase system. You can have up to six inverters in parallel per phase, significantly increasing the system’s capacity. 

An alternative configuration for a split-phase 240V power source is connecting a Victron autotransformer to a 230V (European version) Multiplus-II inverter. 

Robust and Configurable AC Charger

The main output of the Multiplus-II inverters uses advanced adaptive charge software with a fine-tuned three-stage automatic charging; it has a fourth stage for long periods of float charging. 

The Multiplus-II allows you to set a maximum input current (AC) from the generator or shore power; the charger will then prioritize the loads (AC output) and use the remaining energy to charge your batteries. 

Multiplus-II inverters are also equipped with a PowerAssit feature that will take energy from the batteries to assist the generator when its capacity is not enough to run the loads during high demand (peak) periods; once the loads are back to normal, the charger will use the generators excess energy to recharge the batteries. 

Easy System Configuration

The Multiplus-II will operate out of the box without any additional configuration. The factory settings can be modified using the inverter’s DIP switches. VE.Net can be used instead of the DIP switches and the VE.Bus software is available for more sophisticated settings and features. 

Difference Between Multiplus and Multiplus-II Inverters

One main difference between the Multiplus and the Multipluss II models is that the Mukltiplus-II features a double-acting AC input anti-islanding relay allowing compliance for grid connectivity. 

Additionally, the Multiplus-II has other features that allow Victron to reduce manufacturing costs without compromising performance. 

• Steel enclosure instead of aluminum. 
• A new circuit deposition technique, smaller chips with fewer integrated circuit components, using less silicon overall.
• A single larger toroidal transformer, rather than two smaller ones, results in a slightly decreased peak surge power rating but higher efficiency.
• Physically smaller, increasing units per container and reducing shipping and warehousing costs.