Victron Energy Quattro 48/5000/70-100/100 120V VE.Bus Inverter/Charger – QUA485021100

Product Overview

The Victron Energy Quattro 48/5000/70-100/100 120V VE.Bus is a high-capacity inverter/charger designed for demanding 48V battery systems. Combining a pure sine wave inverter, a powerful 70A battery charger and an automatic transfer switch, it provides an integrated solution for marine electrical systems, off-grid installations, backup power and compatible energy storage applications.

With a 5,000VA inverter capacity and two independent AC inputs, the Quattro can manage external power sources such as shore power and a generator. It automatically selects an available AC source according to its configured priorities and switches to battery-powered inverter operation when external AC power is unavailable.

High-Capacity Pure Sine Wave Inverter

The integrated inverter converts 48V DC battery power into 120V AC electricity with a pure sine wave output. This is suitable for many compatible appliances, electronics and electrical equipment, provided their power requirements remain within the unit's operating limits.

The inverter is rated at 5,000VA, with continuous active power output of approximately 4,000W at 25°C. Its output capability reduces at higher temperatures, so the installation must account for ambient temperature, ventilation and expected electrical loads.

The 48V battery configuration helps reduce DC current compared with equivalent lower-voltage systems at similar power levels. A suitably sized battery bank, correctly rated DC cabling and appropriate overcurrent protection are essential for reliable performance.

Two Independent AC Inputs

A key advantage of the Quattro is its ability to connect to two independent AC sources. For example, a marine installation can use shore power as one source and a generator as the other.

The unit automatically connects to an available source according to its configuration. Its integrated transfer switch manages the changeover between incoming AC power and inverter operation, helping maintain the supply to connected loads when the external source becomes unavailable.

Each AC input has a 100A transfer path. Incoming supplies, protective devices and connected circuits must be designed to meet the manufacturer's specifications and applicable electrical regulations.

Integrated 70A Battery Charger

The built-in battery charger delivers up to 70A of charging current under the specified operating conditions. When connected to a suitable external AC supply, the Quattro can power connected loads while recharging the 48V battery bank.

Victron's adaptive charging technology manages the charging process through the appropriate stages. The charger must be configured for the installed battery chemistry and the battery manufacturer's recommended charging parameters.

Correct charging configuration helps support battery performance and service life. Compatible battery management equipment should be included where required by the battery system.

PowerControl and PowerAssist

PowerControl helps prevent a limited external AC source from being overloaded by allowing the maximum current drawn from that source to be configured. This is particularly useful when using a generator or shore-power connection with limited capacity.

PowerAssist provides an additional level of power management by supplementing the external AC supply with energy from the battery when demand temporarily exceeds the configured input-current limit. This helps accommodate short periods of higher electrical demand without relying entirely on the incoming source.

Together, these features help make effective use of available power in installations with changing loads and limited AC supply capacity.

Auxiliary AC Output

The Quattro includes a second AC output intended for loads that should operate only when external AC power is available. This output is switched off when the unit operates in inverter mode, helping prevent selected appliances from discharging the battery bank.

This can be useful for equipment such as water heaters or air-conditioning systems that are intended to run only when shore power or a generator is supplying the installation. The auxiliary output must be wired and configured according to the manufacturer's instructions.

VE.Bus Communication and System Integration

The VE.Bus communication interface supports configuration and integration with compatible Victron equipment. Depending on the installation design, multiple compatible units can be configured for parallel operation, split-phase systems or three-phase arrangements.

When paired with compatible monitoring equipment, the Quattro can provide greater visibility of system operation and support remote monitoring and control. This makes it suitable for installations ranging from individual off-grid systems to larger, more sophisticated power networks.

Any expanded system must use compatible equipment and be correctly configured and commissioned.

Applications

The Victron Energy Quattro 48/5000/70-100/100 120V is suitable for compatible marine electrical systems, boats using 120V AC equipment, off-grid properties, remote power installations and backup-power systems built around 48V batteries.

Its dual AC inputs make it particularly useful where two external power sources are available. The combination of inverter, battery charger, automatic transfer switching and power-assistance functions helps simplify system design while providing flexible power management.

Important: This model provides 120V AC output and is intended for compatible electrical systems. It is not a direct replacement for the 230V version typically used in UK and European installations.

Technical Specifications

Product name: Victron Energy Quattro 48/5000/70-100/100 120V VE.Bus.

Product code: QUA485021100.

Product type: Inverter/charger with integrated automatic transfer switch.

Nominal battery voltage: 48V DC.

DC input voltage range: 38–66V.

Inverter capacity: 5,000VA.

Continuous active power at 25°C: Approximately 4,000W.

AC output voltage: 120V AC.

Output frequency: 60Hz.

Maximum battery charging current: 70A.

Number of AC inputs: Two independent inputs.

AC transfer paths: Two 100A paths.

Maximum inverter efficiency: Approximately 95%.

Communication interface: VE.Bus.

Key functions: Pure sine wave inversion, adaptive battery charging, PowerControl, PowerAssist, automatic AC source selection and auxiliary AC output.

Installation and Compatibility

The Quattro must be installed in accordance with Victron's instructions and applicable electrical regulations. Confirm that the battery bank is suitable for a 48V system and can deliver the current required by the inverter under expected operating conditions.

Installation should include correctly rated DC cables, appropriate battery-side overcurrent protection, suitable AC circuit protection, proper earthing and adequate ventilation. Both incoming AC sources must be installed and protected correctly, and connected loads must remain within the unit's ratings.

Battery charging settings must match the installed battery type. Parallel or split-phase configurations require compatible equipment, suitable system design and correct commissioning. Professional installation is recommended, particularly for marine, commercial and permanently wired systems.

Before purchasing, verify that the 120V AC output and dual-input arrangement are appropriate for your intended application.

Product Summary

The Victron Energy Quattro 48/5000/70-100/100 120V VE.Bus combines a 5,000VA pure sine wave inverter, 70A battery charger and automatic transfer switching in one integrated unit. Its two independent AC inputs, PowerControl, PowerAssist and auxiliary output make it a versatile choice for compatible 48V battery installations requiring high-capacity 120V AC power.