Victron Energy Quattro-II Inverter/Charger 230V (Euro 50Hz) - 5kVA

Note: This is a 230V / 50Hz (European standard) model with a single-phase output, most often used as a like-for-like replacement on a European-built boat. For US-standard 120/240V split phase you have three options: (1) configure the Quattro-II for 60Hz and pair it with a Victron Autotransformer also set to 60Hz, which splits the 230V/60Hz output into 120/240V; (2) use a Quattro-II 2x120V single-box split-phase unit; or (3) wire two Quattro 120V units in parallel (one per leg).

The Victron Quattro-II is an inverter/charger with two AC inputs and built-in ESS functionality. Connect both shore power and a generator (or two generators) directly to one unit - it automatically selects the active source - while delivering clean pure sine wave power, a fast adaptive charger, anti-islanding for energy storage systems, and PowerAssist, all from a single 5 kVA enclosure.

Available in 230V / 50Hz at 24V or 48V DC. Choose your battery voltage from the variant selector above.

Who the Quattro-II is built for

• European-built boats with shore power and a generator - the Quattro-II auto-selects between the dock and the genset with a seamless changeover.
• Energy Storage Systems (ESS) - anti-islanding, external current-sensor support, and grid-code approvals make it a natural fit for grid-parallel solar-plus-battery systems.
• Off-grid homes and cabins with a backup generator - solar and a genset both feed the same unit.
• Installers and electricians - VE.Bus communication, VEConfigure, and parallel/three-phase scaling.

Why this is the Quattro-II

Two AC inputs with an integrated transfer switch

Connect both shore power and a generator (or two generators) directly. The Quattro-II detects which source is live and switches automatically - no external transfer switch, no relays to size, no second enclosure on the wall.

No-break AC output and two AC outputs

The main output rides through any source loss in under 20 milliseconds, fast enough that computers and other electronics keep running. The second (auxiliary) output, rated 32 A, is live only when an AC source is present - so non-critical loads like a water heater can't drain the battery overnight.

PowerControl and PowerAssist

Set a maximum shore or generator current and the unit uses only the leftover capacity for charging, so the inlet breaker never trips (PowerControl). When a peak load exceeds the inlet rating, it supplements from the battery and recharges once the peak passes (PowerAssist).

ESS-ready with built-in anti-islanding

Built-in anti-islanding and grid-code approvals (see Victron's certificates) let the Quattro-II run a Victron Energy Storage System - self-consumption, peak-shaving, or grid backup - alongside SmartSolar MPPTs or a grid-tie PV inverter and a lithium bank.

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, fully programmable for lithium, AGM, gel, and flooded banks. Maximum charge current is 120 A (24V) or 70 A (48V).

Scales with your system

Up to six units run in parallel on a single VE.Bus for higher output, and three units configure for three phase.

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 VEConfigure (via the MK3-USB interface) or the VictronConnect app over Bluetooth (via the VE.Bus Smart dongle).

Available variants

All variants are sold on this page - choose your battery voltage from the variant selector above. Both are 5,000 VA / 4,000 W continuous, 9,000 W peak.

Model	Battery	Cont. output at 25 C	Peak power	House charger	AC inputs
Quattro-II 24/5000/120-50 230V	24 VDC	4,000 W (5,000 VA)	9,000 W	120 A	Two
Quattro-II 48/5000/70-50 230V	48 VDC	4,000 W (5,000 VA)	9,000 W	70 A	Two

Not sure which fits your bank? 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

AC inputs

• Two AC inputs with integrated transfer switch and automatic source selection
• Input voltage range: 187 - 265 VAC, 45 - 65 Hz, power factor 1
• Transfer switch: 50 A
• Maximum AC input current: 50 A

Inverter

• DC input voltage range: 19 - 33 V (24V), 38 - 66 V (48V)
• Output voltage: 230 VAC +/- 2%
• Output frequency: 50 Hz +/- 0.1% (adjustable to 60 Hz)
• Waveform: pure sine
• Continuous output at 25 C: 4,000 W (5,000 VA)
• Continuous output at 40 C: 3,700 W
• Continuous output at 65 C: 3,000 W
• Maximum apparent feed-in power: 5,000 VA
• Peak power: 9,000 W
• Maximum efficiency: 96%

Charger

• Adaptive 4-stage charging: bulk, absorption, float, storage
• Lithium-ion compatible
• Absorption voltage: 28.8 V (24V) / 57.6 V (48V)
• Float voltage: 27.6 V / 55.2 V
• Storage voltage: 26.4 V / 52.8 V
• Maximum charge current: 120 A (24V) / 70 A (48V)
• Battery temperature sensor included

System and communication

• Auxiliary AC output: 32 A (default: switches off in inverter mode)
• VE.Bus port for parallel and three phase operation, remote monitoring, and system integration
• Two general-purpose communication ports
• One programmable relay - general alarm, DC under-voltage, or genset start/stop (AC 230 V / 4 A; DC 4 A up to 35 V, 1 A up to 60 V)
• Remote on/off input
• Compatible with Cerbo GX, Ekrano GX, Digital Multi Control panel, VE.Bus Smart Dongle (Bluetooth), and MK3-USB interface

Protection

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

Enclosure and environment

• Material: steel, 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: 68 lb / 31 kg (24V), 64 lb / 29 kg (48V)
• Dimensions (h x w x d): 607 x 329 x 149 mm (24V); 565 x 320 x 148 mm (48V)

Standards and certifications

• Safety: EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1, EN-IEC 62109-2
• 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
• UPS and anti-islanding: see Victron's certificates

Recommended accessories

• Victron Autotransformer - derive US 120/240V split phase from this 230V unit (both set to 60Hz)
• Cerbo GX or Ekrano GX - system controller and VRM gateway
• SmartShunt or BMV-712 Smart - battery state-of-charge monitoring
• MK3-USB interface - configure the Quattro-II from a laptop via VEConfigure
• Compatible lithium battery banks from Victron, Epoch, and MG Energy Systems
• Victron SmartSolar MPPT - pair to build a full ESS system

Installation and sizing help

Wiring a Quattro-II isn't plug-and-play. Battery cable sizing, fusing, both AC inlet ratings, and bonding all need to match the variant 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 Quattro-II and the MultiPlus-II?

The MultiPlus-II has one AC input. The Quattro-II has two AC inputs with a built-in transfer switch and automatic source selection. Choose the Quattro-II if you run both shore power and a generator (or two generators).

Can I use this 230V unit on US 120/240V power?

Not directly - its output is 230V / 50Hz (European standard). To run on US power, configure the Quattro-II for 60Hz and pair it with a Victron Autotransformer also configured for 60Hz. Alternatively, the Quattro-II 2x120V or two Quattro 120V units in parallel give US split phase directly.

Is it 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.

What warranty does it 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 Quattro-II 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.