Victron Energy MultiPlus Inverter/Charger 120V - 500VA, 800VA & 1200VA

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 enclosure. Connect one shore-power or generator inlet, your battery bank, and your loads to one device - and when the AC source drops, the MultiPlus takes over the load in milliseconds, so connected electronics keep running without interruption.

This listing covers the smaller 120V / 60Hz MultiPlus models - 500VA, 800VA, and 1200VA, all at 12V DC. They are lithium and lead-acid compatible and can be paralleled or three-phased as your system grows. Choose your power class from the variant selector above.

Who these MultiPlus models are built for

• Boats and RVs - quiet, reliable shore-power support and inverter operation for smaller AC loads like electronics, lighting, and small appliances.
• Off-grid cabins and backup power - a compact inverter/charger that pairs with MPPT solar and a modest battery bank, with room to scale by paralleling.
• Sensitive electronics - near-instant switchover keeps computers, routers, and AV gear running when shore or generator power drops.
• Installers and DIYers - VE.Bus communication, DIP-switch setup, and full configurability via VictronConnect and VEConfigure.

Why this is the MultiPlus

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 16 A 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. The main output is no-break, so the changeover happens fast enough that sensitive electronics keep running. (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, so the pedestal breaker stops popping and the generator stops lugging.

PowerAssist - borrow from the battery when the load spikes

When a load 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 recharges the battery. You can run loads larger than your inlet rating.

High start-up power and Search Mode

High inrush capability starts demanding loads such as power converters for LED or halogen lamps, and electric tools. When idle, Search Mode cuts no-load consumption by roughly 70% - the inverter shuts off under no/very low load and wakes every two seconds to check for demand.

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, suitable for lithium, AGM, gel, and flooded batteries. House-battery charge current is 20 A (500VA), 35 A (800VA), or 50 A (1200VA), plus a 1 A trickle output to keep an engine or generator starter battery topped up.

Scales with your system: parallel and three phase

Up to six MultiPlus units can run in parallel for higher output, and three units configure for three phase. Parallel and three-phase operation use an RJ45 splitter (Victron part ASS030065510).

Monitor and control from anywhere

Add a Cerbo GX or Ekrano GX and your 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 power class from the variant selector above.

Model	Battery	Cont. output at 25 C	Peak power	House charger	Weight
MultiPlus 12/500/20-16 120V	12 VDC	430 W (500 VA)	900 W	20 A	9.7 lb (4.4 kg)
MultiPlus 12/800/35-16 120V	12 VDC	700 W (800 VA)	1,600 W	35 A	14.1 lb (6.4 kg)
MultiPlus 12/1200/50-16 120V	12 VDC	1,000 W (1,200 VA)	2,400 W	50 A	18.1 lb (8.2 kg)

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

• DC input voltage range: 9.5 - 17 V
• Output voltage: 120 VAC +/- 2%
• Output frequency: 60 Hz +/- 0.1%
• Waveform: pure sine
• Continuous output at 25 C: 430 W / 700 W / 1,000 W (500 / 800 / 1200 VA)
• Continuous output at 40 C: 400 W / 650 W / 900 W
• Continuous output at 65 C: 300 W / 400 W / 600 W
• Peak power: 900 W / 1,600 W / 2,400 W
• Maximum efficiency: 90% / 92% / 93%
• Zero-load draw: 2-4 W in search mode

Charger

• AC input voltage range: 95 - 140 VAC, 55 - 65 Hz
• Adaptive 4-stage charging: bulk, absorption, float, storage
• Battery types: lithium, AGM, gel, and flooded
• Absorption voltage: 14.4 VDC
• Float voltage: 13.8 VDC
• Storage voltage: 13.2 VDC
• House-battery charge current: 20 A / 35 A / 50 A (500 / 800 / 1200 VA)
• Starter-battery output: 1 A trickle
• Battery temperature sensor included

System and communication

• High-speed AC transfer switch: 16 A
• VE.Bus port (1x RJ45) for remote monitoring and system integration; parallel and three-phase operation use RJ45 splitter ASS030065510
• One programmable relay - general alarm, DC under-voltage, or genset start/stop
• Remote on / off / charger-only input
• DIP-switch setup for remote behavior, charge voltage, and search mode
• Compatible with Cerbo GX, Ekrano GX, Digital Multi Control panel, VE.Bus Smart Dongle (Bluetooth), and MK3-USB interface
• Configurable via DIP switches, VictronConnect, and VEConfigure

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

• Material: steel / ABS, RAL 5012 blue
• Protection category: IP21
• Operating temperature: -40 C to +65 C (fan-assisted cooling)
• Humidity (non-condensing): 95% max
• Internal DC fuse: 125 A / 150 A / 200 A (500 / 800 / 1200 VA)
• Battery connection: 16 mm2 / 25 mm2 / 35 mm2
• AC connection: G-ST18i connector
• Dimensions (h x w x d): 12.24 x 7.17 x 3.94 in (311 x 182 x 100 mm, 500VA); 14.17 x 9.45 x 3.94 in (360 x 240 x 100 mm, 800VA); 15.98 x 9.84 x 3.94 in (406 x 250 x 100 mm, 1200VA)

Standards and certifications

• Safety: EN-IEC 60335-1, EN-IEC 60335-2-29, EN 62109-1
• EMC: EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3
• Road vehicles: ECE R10-4

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 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.

Are these models lithium battery compatible?

Yes. The adaptive charger supports lithium (LiFePO4), AGM, gel, and flooded batteries, with custom voltage and current profiles set in VictronConnect or VEConfigure.

Do these MultiPlus models have a second AC output?

No. The second (non-critical) AC output is a feature of the larger 3 kVA and up MultiPlus models. These 500-1200VA units have a single AC output.

Can I run these in split phase 120/240V?

These models support parallel and three-phase operation but are intended for 120V service. For 120/240V split phase, the larger 2 kVA / 3 kVA MultiPlus (stacked in pairs) or a Victron Autotransformer is the usual approach. Ask us and we'll help you choose.

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.