Victron Energy MultiPlus Inverter/Charger 120V - 2kVA & 3kVA

The Victron MultiPlus is a true sine wave inverter, an adaptive multi-stage battery charger, and a high-speed AC transfer switch in a single compact aluminum enclosure. Connect one shore-power or generator inlet, your battery bank, and your loads to a single device - and when the AC source drops, the MultiPlus takes over the load in under 20 milliseconds, so navigation electronics, computers, and AV gear never reboot.

This listing covers the 120V / 60Hz MultiPlus in 2 kVA and 3 kVA sizes, at 12V or 24V DC. Every model is lithium-compatible, UL-listed, and built to be paralleled, split-phased, or three-phased as your system grows. Choose your battery voltage and power class from the variant selector above.

Who the MultiPlus is built for

• Cruising boats and yachts - one shore or generator inlet with a seamless, no-break changeover, plus PowerAssist so a modest inlet still runs real loads.
• RVs, vans, and overlanders - run a microwave, induction burner, or roof air conditioner off a small generator or a 30A pedestal without tripping breakers.
• Off-grid cabins and backup power - pair with MPPT solar and a battery bank for a self-consumption or backup system that still accepts a generator.
• Installers and electricians - VE.Bus communication, DIP-switch standalone setup, and full configurability via VictronConnect and VEConfigure.

Why this is the MultiPlus, not just another inverter/charger

Inverter, charger, and transfer switch in one box

The MultiPlus combines a low-distortion pure sine wave inverter, a smart adaptive charger, and an integrated AC transfer switch. One AC input feeds the unit - it charges the battery when shore or generator power is present and inverts from the battery when it is not. (If you need two AC inputs, for both shore power and a generator with automatic source selection, look at the Victron Quattro instead.)

PowerControl - never trip the dock pedestal or bog the generator

Set a current limit on the AC input. The MultiPlus accounts for everything else drawing on that circuit and uses only the leftover capacity for charging. The pedestal breaker stops popping and the generator stops lugging - no walking outside in the rain to reset anything.

PowerAssist - borrow from the battery when the load spikes

When a starting load (air-conditioner compressor, microwave, induction cooktop) momentarily exceeds the shore or generator capacity, the MultiPlus instantly supplements the shortfall from the battery bank. As soon as the peak passes, the spare power is used to recharge the battery. You can run loads larger than your inlet rating.

No-break AC output

The main output rides through any source loss in under 20 milliseconds, fast enough that computers, plotters, satellite gear, and CPAP machines stay running through the changeover. The 3 kVA models add a second AC output that is only live when an AC source is present - so non-critical loads like a water heater can't drain the battery overnight.

Adaptive multi-stage charging - lithium and lead-acid friendly

A four-stage charge profile (bulk, absorption, float, storage) with adaptive-charge software and an included battery temperature sensor, plus dedicated programming for lithium chemistries. The 2 kVA models charge a house bank at up to 80 A (12V) or 50 A (24V); the 3 kVA models charge at up to 120 A (12V) or 70 A (24V). Every model also includes a 4 A trickle output to keep an engine or generator starter battery topped up.

Scales with your system: parallel, split phase, three phase

Up to six MultiPlus units can run in parallel for higher output. Two units stack to provide 120/240V split phase (120-0-120), and three units configure for three phase - with up to six units per phase. Alternatively, a Victron Autotransformer can derive split-phase 120/240V from a single unit.

Monitor and control from anywhere

Add a Cerbo GX or Ekrano GX and your entire system is visible in the free VRM Portal from your phone, tablet, or laptop. Configure on-site with the VictronConnect app over Bluetooth (via the VE.Bus Smart dongle) or over USB with the MK3-USB interface. Read: Is the MultiPlus Smart?

Available variants

All variants are sold on this page - choose your battery voltage and power class from the variant selector above.

Model	Battery	Cont. output at 25 C	Peak power	House charger	2nd AC output	UL
MultiPlus Compact 12/2000/80-50 120V	12 VDC	1,600 W (2,000 VA)	4,000 W	80 A	No	UL listed
MultiPlus 12/3000/120-50 120V	12 VDC	2,400 W (3,000 VA)	6,000 W	120 A	Yes	UL listed
MultiPlus Compact 24/2000/50-50 120V	24 VDC	1,600 W (2,000 VA)	4,000 W	50 A	No	Standard
MultiPlus 24/3000/70-50 120V	24 VDC	2,400 W (3,000 VA)	6,000 W	70 A	Yes	UL listed

Not sure which MultiPlus is right for your boat, RV, or off-grid build? Get a custom quote from our Seattle team or book a system consultation and we'll size your inverter, charger, batteries, and cabling together.

Full technical specifications

Inverter

• Output voltage: 120 VAC +/- 2%
• Output frequency: 60 Hz +/- 0.1% (adjustable to 50 Hz)
• Waveform: pure sine
• Continuous output at 25 C: 1,600 W (2 kVA) or 2,400 W (3 kVA)
• Continuous output at 40 C: 1,450 W (2 kVA) or 2,200 W (3 kVA)
• Continuous output at 65 C: 1,100 W (2 kVA) or 1,700 W (3 kVA)
• Peak power: 4,000 W (2 kVA) or 6,000 W (3 kVA)
• Maximum efficiency: up to 94%
• Zero-load draw: as low as 3-8 W in search mode

Charger

• Input voltage range: 95-140 VAC, 45-65 Hz, power factor 1
• Adaptive 4-stage charging: bulk, absorption, float, storage
• Lithium-ion compatible
• Absorption voltage: 14.4 / 28.8 VDC (12V / 24V banks)
• Float voltage: 13.8 / 27.6 VDC
• Storage voltage: 13.2 / 26.4 VDC
• House-battery charge current: 80 A (12/2000), 50 A (24/2000), 120 A (12/3000), 70 A (24/3000)
• Starter-battery output: 4 A trickle
• Battery temperature sensor included

System and communication

• High-speed AC transfer switch: 50 A
• VE.Bus port for parallel, split phase, and three phase operation, remote monitoring, and system integration
• Auxiliary output: 32 A (3 kVA models only)
• Programmable relay: 1x (2 kVA) or 3x (3 kVA) - general alarm, DC under-voltage, or genset start/stop
• General-purpose communication ports: 2x (3 kVA models)
• Remote on/off input
• Compatible with Cerbo GX, Ekrano GX, Digital Multi Control panel, VE.Bus Smart Dongle (Bluetooth), and MK3-USB interface
• Configurable via DIP switches, VictronConnect, VEConfigure, and VE.Bus System Configurator

Protection

• Output short circuit
• Overload
• Battery voltage too high or too low
• Over-temperature
• 120 VAC on inverter output
• Excessive input voltage ripple

Enclosure and environment

• Aluminum enclosure, RAL 5012 blue
• Protection category: IP21
• Operating temperature: -40 C to +65 C (fan-assisted cooling)
• Humidity (non-condensing): 95% max
• Battery connection: M8 bolts
• AC connection: 6 AWG (13 mm2) screw terminals
• Weight: 28 lb / 13 kg (2 kVA Compact), 42 lb / 19 kg (3 kVA)
• Dimensions: 20.5 x 10.0 x 5.0 in / 520 x 255 x 125 mm (2 kVA Compact); 14.3 x 10.2 x 8.6 in / 362 x 258 x 218 mm (3 kVA)

Standards and certifications

• Safety: UL 458 and EN-IEC 60335-1 / 60335-2-29 (all models); UL 1741 (24V 3 kVA)
• EMC: EN-IEC 61000-3-2, 61000-3-3, 61000-6-1, 61000-6-2, 61000-6-3

Recommended accessories

• Cerbo GX or Ekrano GX - system controller and VRM gateway
• BMV-712 Smart or SmartShunt - battery state-of-charge monitoring over Bluetooth
• MK3-USB interface - configure the MultiPlus from a laptop via VEConfigure
• Compatible lithium battery banks from Victron, Epoch, and MG Energy Systems
• Victron MPPT solar charge controllers for hybrid solar systems

Installation and sizing help

Wiring a MultiPlus into a marine, RV, or off-grid system isn't plug-and-play. Battery cable sizing, fusing, and grounding all need to match the model you choose. Two free resources to start with:

• Victron Wiring Unlimited - the canonical reference for sizing the DC and AC sides of a Victron system.
• Our AWG to Metric Conversion chart.

If you want a second set of eyes on your one-line diagram, our certified technicians do system consultations and full custom quotes. Email support@bluemarine.com or call (800) 628-6306.

Frequently asked questions

What's the difference between the MultiPlus and the Quattro?

The MultiPlus has one AC input. The Quattro has two AC inputs with a built-in transfer switch. If you have both shore power and a generator (or two generators) and want automatic source selection, the Quattro saves you an external transfer switch. If you only ever connect one AC source, the MultiPlus is all you need.

What does the MultiPlus Compact mean?

The 2 kVA models in this listing are the MultiPlus Compact - a slimmer, lighter enclosure (520 x 255 x 125 mm, 13 kg) for tighter installs. They are full MultiPlus units electrically, but the 2 kVA Compact has a single programmable relay and no second AC output or auxiliary output (those features are on the 3 kVA models).

Can the MultiPlus do split phase 120/240V on its own?

No. A single MultiPlus is a 120 VAC inverter. To get split phase 120/240 VAC, stack two matched MultiPlus units over VE.Bus, or use a Victron Autotransformer with one unit. The stacked pair behaves as one split-phase inverter/charger.

Is the MultiPlus lithium battery compatible?

Yes. The charger supports custom voltage and current profiles for LiFePO4 and other lithium chemistries, and it communicates with Victron's VE.Bus BMS over the communication port.

Does the MultiPlus need a Cerbo GX?

Not strictly. You can configure and monitor it with DIP switches, a Digital Multi Control panel, or the VictronConnect app over Bluetooth (via the VE.Bus Smart dongle). A Cerbo GX or Ekrano GX adds remote monitoring through the free VRM Portal and is recommended for parallel or three-phase systems.

What warranty does the MultiPlus come with?

A 5-year limited warranty from Victron Energy, upgradable to 10 years for an additional 10% of the purchase price. Blue Marine handles the warranty claim process for you. Email support@bluemarine.com.

Why buy your MultiPlus from Blue Marine

• True Blue Victron Energy Distributor - we carry the full Victron line and know the products inside out.
• Certified technicians on the phone - (800) 628-6306 for sizing, troubleshooting, and warranty support.
• Free shipping over $49 from our Seattle warehouse.
• 60-day hassle-free returns.
• Local pickup available in Seattle, WA.
• Custom quotes and full system design - we'll spec the inverter, batteries, MPPTs, cabling, and monitoring as one package.
• Dealer and installer program with trade pricing. Apply here.