Victron Quattro-II 48/5000/70-50/50 230V Inverter Charger — QUA482504010

The Victron Quattro-II 48/5000/70-50/50 is a 5000VA combined inverter and charger designed for 48V battery systems operating at 230V AC. It accepts two independent AC inputs, making it suited to installations where both shore power or grid and a generator are present. This is a professional-grade unit for off-grid, backup and hybrid energy systems where reliable AC output and flexible charging are required.

Key Features

• 5000VA continuous inverter output at 230V AC from a 48V DC battery bank.
• Two AC inputs allow simultaneous connection of grid (or shore power) and a generator, with automatic transfer switching between them.
• 70A battery charger built in, with adaptive charging to suit lead-acid and lithium battery chemistries.
• Two 50A AC pass-through outputs allow load management across separate circuits.
• PowerControl and PowerAssist functions limit total AC draw and supplement mains or generator power with battery power when demand exceeds the input current limit.
• Compatible with Victron VE.Bus for system integration, remote monitoring and configuration via VictronConnect or Venus OS devices.
• Supports parallel and three-phase operation when multiple units are used together.

Product Overview

The Quattro-II replaces the original Quattro range with updated internals while retaining the same proven dual-AC-input architecture. The two AC inputs are not simply redundant: the unit can be configured to prioritise one source over the other, and the transfer switch operates without interruption to connected loads. This matters in practice for installations where a generator is used as a backup to grid, or where shore power and a generator are both available on a vessel or remote site.

The 70A charger is a full multi-stage adaptive charger. It adjusts charge current based on battery temperature (with optional sensor) and battery state, which extends battery life compared to fixed-rate chargers. PowerAssist is particularly useful where the AC input is current-limited, such as a small generator or a restricted shore power supply: the unit draws from the battery to supplement the AC source rather than overloading it. This allows a smaller, more economical generator to run larger loads.

The Quattro-II communicates over VE.Bus, which means it integrates directly with Victron GX devices (Cerbo GX, CCGX and others) for full system monitoring and control. It can be configured in parallel for higher power output or in split-phase and three-phase arrangements using multiple units. At 28.35 kg, installation requires two people and appropriate mounting provisions.

Technical Specifications

Applications

• Off-grid residential and commercial systems with a 48V battery bank and generator backup.
• Marine and narrowboat installations requiring dual AC source management (shore power and onboard generator).
• Remote telecoms, agricultural or industrial sites where grid power is unreliable or unavailable.
• Critical backup power systems where uninterrupted AC output is required during mains failure.
• Multi-unit parallel or three-phase installations requiring higher output capacity.
• Hybrid solar systems integrated with a Victron GX device for full energy management.

What Is Included

• 1 x Victron Quattro-II 48/5000/70-50/50 230V inverter charger unit

Installation Notes

This unit operates at 48V DC and 230V AC and must be installed by a qualified electrician or accredited installer. DC cabling, fusing and battery connections must be sized correctly for the current ratings involved. For any grid-connected application in the UK, compliance with G98 or G99 (depending on export capacity and connection type) is required, and the relevant Distribution Network Operator must be notified. Generator and shore power connections must be made in accordance with applicable wiring regulations. Due to the unit's weight of 28.35 kg, two-person installation is recommended. Configuration should be carried out using Victron's VEConfigure software or VictronConnect via a compatible interface.