A Quattro, plus ESS (Energy Storage System) functionality

The Quattro-II can be connected to two independent AC sources, for example, the public grid and a generator, or two generators. The Quattro-II will automatically connect to the active source. Similar to the Victron Energy MultiPlus-II, the Quattro-II is also a combined inverter and charger. Additionally, it can accept two AC inputs and automatically connect to the active source. Its many features include a true sine wave inverter, adaptive charging, hybrid PowerAssist technology plus multiple system integration features such as three or split phase operation and parallel operation.

Two AC Inputs & two AC Outputs

The Quattro-II can be connected to two independent AC sources, for example, shore-side power and a generator, or two generators. The Quattro-II will automatically connect to the active source. The main output has no-break functionality. In the event of a grid failure, or shore or generator power being disconnected, the Quattro-II takes over the supply to the connected loads. 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 one of the inputs of the Quattro-II. Loads that should not discharge the battery, such as air-conditioning or a water heater can be connected to this output.

Unique PowerAssist and PowerControl feature

The Quattro-II will prevent overload of a limited AC source, such as a generator or shore power connection. First, battery charging will automatically be reduced when otherwise an overload would occur. The second level will boost the output of a generator or shoreside supply with power taken from the battery. To implement PowerControl and
PowerAssist and to optimise self-consumption with external current sensing, a Current Transformer Sensor 100A:50mA is required.

A maximum grid or generator current can be set. The Quattro-II will then take account of other AC loads and use whatever is extra for battery charging, thus preventing the generator or grid from being overloaded (PowerControl function). PowerAssist takes the principle of PowerControl to a further dimension. Where peak power is so often required only for a limited period, the Quattro-II will compensate insufficient generator, shore or grid power with power from the battery. When the load reduces, the spare power is used to recharge the battery.

Virtually unlimited power thanks to parallel operation

Up to 6 Quattros-II can operate in parallel to achieve higher power output. Three phases or split phase operation is also possible.

Parallel and 3 Phase operation

Up to 6 Quatros can operate in parallel to achieve higher power output. Six 24/5000/120 units, for example, will provide 25 kW / 30 kVA output power with 720 Amps charging capacity. In addition to parallel connection, three units of the same model can be configured for three-phase output, and up to 6 sets of three units can be parallel connected per phase for a 75 kW / 90 kVA inverter and more than 2100 Amps charging capacity.

Solar energy: AC power available even during a grid failure

The Quattro-II can be used in off-grid as well as grid-connected PV and other alternative energy systems. It is compatible with both solar charger controllers and grid-tie inverters.

On-site system configuring, monitoring and control

Settings can be changed in a matter of minutes with VEConfigure software (computer or laptop and MK3-USB interface needed). Several monitoring and control options are available such as Victron Energys' Cerbo GX, Bluetooth (with the optional VE.Bus Smart dongle), Battery Monitor, Digital Multi Control Panel.

Remote configuring and monitoring

Install a Cerbo GX or other GX product to connect to the internet. Operational data can be stored and displayed on Victron's VRM (Victron Remote Management) website, free of charge. When connected to the internet, systems can be accessed remotely, and settings can be changed.

Standard Marine, Mobile or Off-grid application

Loads that should shut down when AC input power is not available can be connected to a second output. These loads will be taken into account by the PowerControl and  PowerAssist function in order to limit AC input current to a safe value when AC power is available.


Application with MPPT Solar Charge Controller


Quattro-II 24/5000/120-50
PowerControl & PowerAssist Yes
Transfer switch 50 A
Maximum AC input current 50 A
DC Input voltage range 19–33 V
Output Output voltage: 230 VAC ± 2% Frequency: 50 Hz ± 0,1% (1)
Cont. output power at 25°C (3) 5000 VA
Cont. output power at 25°C 4000 W
Cont. output power at 40°C 3700 W
Cont. output power at 65°C 3000 W
Maximum apparent feed-in power 5000 VA
Peak power 9000 W
Maximum efficiency 96%
Zero load power 18 W
Zero load power in AES mode 12 W
Zero load power in Search mode 2 W
AC Input Input voltage range: 187-265 VAC
Input frequency: 45 – 65 Hz power factor: 1
Charge voltage 'absorption' 28.8 V
Charge voltage 'float' 27.6 V
Storage mode 26.4 V
Max. battery charge current (4) 120 A
Battery temperature sensor Yes
Auxiliary output Yes (32A) Default setting: switches off when in inverter mode
External AC current sensor
Programmable relay (5) Yes
Protection (2) a – g
VE.Bus communication port For parallel and three phase operation, remote monitoring and system integration
General purpose com. port Yes, 2x
Remote on-off Yes
Operating temperature range -40 to +65°C (fan assisted cooling)
Humidity (non-condensing) max 95%
Material & Colour Steel, blue RAL 5012
Protection category IP22
Battery-connection M8 bolts
230 V AC-connection Screw terminals 13 mm² (6 AWG)
Weight 30 kg
Dimensions (hxwxd) 560 x 328 x 148 mm
Safety EN-IEC 60335-1, EN-IEC 60335-2-29,
EN-IEC 62109-1, EN-IEC 62109-2
Emission, Immunity 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
Uninterruptible power supply Please consult the certificates on Victrons website.
Anti-islanding Please consult the certificates on Victrons website.
1) Can be adjusted to 60 Hz 3) Non-linear load, crest factor 3:1
2) Protection key: 4) At 25°C ambient
a) output short circuit 5) Programmable relay which can be set for general alarm, DC under voltage or
b) overload genset start/stop function. AC rating: 230V / 4A, DC rating: 4A up to 35VDC and 1A
c) battery voltage too high up to 60VDC
d) battery voltage too low
e) temperature too high
f) 230 VAC on inverter output
g) input voltage ripple too high
SKU VIC.QUA242505010
Model # QUA242505010
UPC/EAN 8719076052920
Brand Victron Energy
Shipping Weight 33.0000kg
Shipping Width 0.340m
Shipping Height 0.440m
Shipping Length 0.530m
Shipping Cubic 0.079288000m3

Purchase with confidence knowing your product is covered by the Victron 5-year manufacturer warranty.

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