Victron Energy Inverter/Charger 4kW Quattro 24/5000/120-100/100 120V QUA245023110

The Victron Energy Quattro 24/5000/120-100/100 120V is a 5,000VA pure sine wave inverter charger for 24VDC systems that sets itself apart from single-input competitors with two independent AC inputs, two AC outputs, and the PowerAssist function that lets a generator or shore power supply supplement—rather than replace—battery-backed inverter output. Designed for installations where two AC sources must be managed intelligently and loads require uninterrupted power, it is the core of Victron's most capable inverter charger line.

Key specifications

• Continuous output power: 5,000VA / 4,000W at 77°F (25°C); 3,700W at 104°F (40°C); 3,000W at 149°F (65°C)
• Peak power: 10,000W
• AC output voltage / frequency: 120VAC ±2%; 60Hz ±0.1%
• DC input voltage: 24V nominal (19–33VDC operating range)
• AC inputs: 2 independent inputs; 90–140VAC; 45–65Hz; 2×100A maximum feed-through current; power factor 1
• Battery charger: 120A house battery; absorption 28.8VDC; float 27.6VDC; storage 26.4VDC; battery temperature sensor included
• Maximum efficiency: 94%
• Zero load power: 30W (on); 25W (AES mode); 10W (search mode)
• Auxiliary output: 50A (live only when AC input is present)
• Programmable relays: 3× (alarm, DC undervoltage, generator start/stop)
• Communication: VE.Bus (parallel/split-phase/three-phase, remote monitoring); 2× general purpose ports; remote on/off
• Operating temperature: −40°F to 149°F (−40°C to 65°C); humidity max. 95% non-condensing
• Enclosure: IP21; aluminium (blue RAL 5012)
• Safety certifications: EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1
• Dimensions: 18.5 H × 14.0 W × 11.2 D in. (470 × 350 × 280 mm); 66 lbs. (30 kg)

Two AC inputs: grid and generator, managed automatically

Most inverter chargers accept a single AC source—either grid or generator, never both simultaneously. The Quattro accepts two independent AC inputs and automatically connects to whichever source is active, switching between them without manual intervention. This allows a utility grid connection and a standby generator to be wired permanently, with the Quattro selecting the active source and transferring between them seamlessly. The PowerControl function sets a current limit on each AC input so the Quattro accounts for other running loads before using remaining capacity for battery charging—preventing the generator or utility supply from being overloaded when other appliances are drawing current.

PowerAssist: battery supplements limited AC sources

PowerAssist inverts the conventional logic of an inverter charger. Rather than the battery being a backup that kicks in only when AC fails, PowerAssist allows the battery to actively supplement an AC source that is too small for the current load—drawing from both simultaneously. When a generator rated below peak demand is connected, the Quattro pulls the shortfall from the battery in real time, preventing the generator from overloading. When peak demand passes, the spare generator capacity recharges the battery. This allows smaller, quieter, more fuel-efficient generators to be used in installations that would otherwise require a larger unit.

Two AC outputs with no-break main output

The Quattro provides two separate AC output circuits. The main output transfers to battery-backed inverter power in under 20ms when AC input fails—fast enough that computers, UPS-dependent equipment, and sensitive electronics continue operating without interruption. The second auxiliary output is live only when AC power is present on one of the inputs, making it the correct connection point for loads that should never draw from the battery—water heaters, resistance heating elements, and other high-consumption appliances that would deplete storage unnecessarily during an outage.

Application scenarios

• Marine and shore power: Shore power on AC input 1, onboard generator on AC input 2; PowerControl prevents shore breaker trips while PowerAssist handles peak load demands.
• Off-grid with generator backup: Solar-charged 24V bank as primary source with generator backup auto-selected when battery is low, with no manual switching required.
• Critical load protection: Sub-20ms transfer keeps sensitive electronics and communications equipment online through grid outages on the main output, while non-critical loads on the auxiliary output are shed automatically.
• Scalable three-phase systems: Three Quattro units configure for three-phase output via VE.Bus; up to four sets of three units (12 total) parallel for up to 120kVA and 1,440A of charging capacity.

VE.Bus ecosystem and remote monitoring

The Quattro integrates natively into Victron's VE.Bus architecture, enabling parallel operation, split-phase and three-phase configuration, and full system integration with GX devices such as the Cerbo GX or Ekrano GX. When a GX device is connected, the system is accessible through Victron's VRM (Victron Remote Management) portal for free remote monitoring, remote settings changes, and alarm notifications by email or push. On-site control options include the Digital Multi Control Panel, VE.Bus Smart Dongle for Bluetooth access via the VictronConnect app, and the Interface MK3-USB for configuration via VEConfigure software. Three programmable relays support general alarm, DC undervoltage signaling, and automatic generator start/stop.

System compatibility

The Quattro 24/5000/120-100/100 operates on a 24V battery bank across 19–33VDC and includes a battery temperature sensor for charge compensation. AC wiring uses M6 bolt terminals; battery connections use four M8 bolts (two positive, two negative) supporting large-gauge cabling for the 120A charge current. It is compatible with the full range of Victron MPPT solar chargers, GX monitoring devices, battery monitors (BMV-712, SmartShunt), and Victron lithium battery systems. Off-grid, grid-interactive, and self-consumption configurations involving MPPT solar chargers can be set up using Victron's Assistant software framework.

Why choose the Victron Energy Quattro 24/5000/120-100/100?

The Victron Energy Quattro 24/5000/120-100/100 120V is the right choice for 24V installations that need more than a basic inverter charger: dual AC source management, PowerAssist generator supplementation, two independently switched AC outputs, and deep integration with Victron's VE.Bus and VRM ecosystem. For marine, off-grid, and critical backup applications where a single AC input is not enough and load management must be automatic and precise, the Quattro delivers a level of flexibility and system intelligence that single-input inverter chargers cannot match.