Multifunction Inverter Victron Energy MultiPlus-II GX 48V 5000/70-50

Victron Energy MultiPlus-II GX 48V 5000/70-50 is a multifunction inverter designed for 48 V battery systems, combining inverter, charger and power management in a single unit. Offering 5000 VA continuous inverter capacity and integrated GX communication, the device enables DC-to-AC conversion, battery charging and system monitoring from a central control point. It is suitable for off-grid installations, backup power and mobile applications where reliable power conversion and configurable charging strategies are required.

Advantages

The MultiPlus-II GX delivers simultaneous inverter and charger operation with adaptive power control, allowing seamless transfer between grid and battery power. Built-in GX communication provides remote monitoring and control, while robust thermal management and protective circuitry ensure stable operation under varying loads. Its modular design supports multi-unit parallel and three-phase configurations for scalable power, and integrated settings let users tailor charging profiles for different battery chemistries.

Suitable for

• Off-grid houses and cabins requiring AC supply from 48 V battery banks
• Backup power for critical loads in small commercial or residential sites
• Mobile installations such as boats, RVs or service vehicles with 48 V systems
• Hybrid systems combining renewable generation, battery storage and grid connection

Key specifications

• Nominal DC input voltage: 48 V
• Inverter continuous power: 5000 VA
• Charger current output: 70 A
• AC transfer capability: automatic transfer relay for seamless changeover
• Integrated communication: GX interface for monitoring and control
• Parallel and three‑phase capability: scale power by multiple units

How to use

Install the MultiPlus-II GX in a ventilated location close to the 48 V battery bank and connect DC cables according to the manufacturer's polarity and cross‑section recommendations. Connect the AC input to the grid or generator and the AC output to the distribution system or loads. Configure charging parameters and system behavior using the GX interface or compatible monitoring software, set acceptable transfer thresholds and charging profiles for the battery type in use. Verify all protective settings, fuses and circuit breakers before commissioning.

Usage recommendations

For reliable long-term performance, use appropriately sized DC cabling, maintain adequate ventilation and follow recommended thermal clearance. Regularly monitor state of charge and charging cycles through the GX interface, and apply battery-specific charging profiles. When paralleling units or creating a three-phase array, ensure matching firmware versions and synchronized configuration.