Victron MultiPlus-II 48V/4500VA/55A-32/230V GX Inverter Charger

The Victron MultiPlus-II 48V/4500VA/55A-32/230V GX Inverter Charger is a high-performance, all-in-one power solution for professional off-grid, backup and energy storage systems. It combines a 4.5 kVA pure sine wave inverter, a 55 A smart battery charger and a 32 A automatic transfer switch, wrapped in a robust enclosure with an integrated GX device for advanced monitoring and control. 

For installers, the big difference with the GX version is that the communications and control hardware are built in. The unit can directly communicate with solar chargers, batteries, meters and other Victron devices, giving you a single, intelligent hub to manage grid-connected, off-grid or remote power systems. This reduces wiring complexity, saves panel space and eliminates the need for a separate Cerbo GX or similar controller in many projects.

On the AC side, the MultiPlus-II GX delivers reliable 230 V power for homes, small commercial sites, boats and specialist vehicles. The main output offers uninterrupted power with transfer times typically under 20 ms, so IT loads and sensitive electronics ride through grid failures cleanly. A second AC output can be used for non-essential loads, ensuring that immersion heaters, HVAC or other large consumers do not drain the battery bank during backup operation. 

Core Victron features such as PowerControl and PowerAssist help you work around limited grid or generator capacity. You can cap the input current to avoid tripping breakers, while the inverter automatically tops up short-term peaks from the battery and then recharges once demand falls. This is particularly useful on rural supplies, temporary power or generator-backed sites.

The MultiPlus-II GX integrates cleanly into ESS (Energy Storage System) designs, supporting both DC-coupled MPPT solar and AC-coupled PV inverters. With appropriate metering it can optimise self-consumption, limit export where required and provide whole-home or partial-backup functionality, giving your customers better energy independence and bill control. 

Scalability is built in: units can be paralleled for higher power or configured in three-phase systems, allowing you to standardise on one platform and grow with your customer’s needs over time. Remote access via the built-in GX device, VRM portal and Victron apps enables ongoing monitoring, firmware updates and diagnostics—ideal if you offer service contracts or long-term support. 

With its combination of inverter/charger hardware, integrated GX networking and proven Victron reliability, the Victron MultiPlus-II 48V/4500VA/55A-32/230V GX Inverter Charger gives installers a compact, high-end building block for modern storage, backup and off-grid projects.