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MultiPlus-II 48/6k5/100-50 GX is a flagship, highly reliable next-generation hybrid inverter from the Dutch brand Victron Energy. The model combines an ultra-powerful pure sine wave inverter, an intelligent battery charger with a maximum current of up to 100 A, a high-speed automatic transfer switch for backup power rated at 50 A (UPS class), and an integrated GX controller with an LCD display into a single housing.
This device is an ideal solution for building flexible energy storage systems (Victron ESS), off-grid systems, and high-capacity backup setups. It ensures full synchronization with grid-tied solar inverters, MPPT solar charge controllers, smart BMS batteries, and fuel generators.
Key Advantages and Functional Features
- Rated Power: 6 kW (at 25°C), with time-limited capability up to 6.5 kW (for 4 hours) or 8 kW (for 1 hour).
- Colossal Peak Margin: the maximum short-term power reaches 11 kW (for 1 minute), allowing easy startup of any equipment with heavy inrush currents (pumps, machine tools, air conditioners).
- Pure Sine Wave 230 V — guarantees completely safe and uninterruptible operation of sensitive household appliances, medical equipment, and server stations.
- Conversion Efficiency: the maximum inverter efficiency reaches 96%.
- Low Self-Consumption: 28 W in normal mode, 18 W in AES mode, and only 8 W in Search energy-saving mode.
- Ultra-Powerful Adaptive Charging: a record battery charge current of up to 100 A (at 25°C) with an integrated temperature compensation system.
- Extreme Temperature Resilience: stable operation within a range of −40 to +65°C thanks to forced active cooling.
- Built-in GX Module: the integrated LCD display (2x16 characters), Wi-Fi, Ethernet, BMS-Can port, VE.Direct, and USB allow connecting the system to the VRM cloud without purchasing external controllers.
- PowerControl / PowerAssist — intelligent grid consumption limitation and instant power boosting from the battery during peak load periods.
Technological Features and Topology
Dual AC Outputs: the main output ensures instantaneous switching to battery operation during a grid failure (UPS function). The second auxiliary output automatically disconnects non-critical loads (e.g., an electric vehicle or a water heater) if external power is lost, protecting the battery from premature discharge.
Intelligent Energy Management (Victron ESS): the device dynamically redistributes energy flows, maximizes solar self-consumption, allows configuring operation based on off-peak (night) tariffs, and, if necessary, completely blocks power export to the external grid.
Parallel and Three-Phase Operation: supports combining multiple inverters to scale system capacity. Notably, only one inverter of the GX modification is required for the entire system, acting as the master controller.
Remote Control and Analytics via VRM
The built-in GX core transmits all operating parameters of the system to the free Victron Remote Management (VRM) portal. Through the VRM website or mobile app, users can fully adjust settings, monitor battery state of charge (SOC), view consumption logs, and receive push and email notifications in case of alarm events.
Technical Specifications of the Model
| Parameter | Technical Data of Model 48/6k5/100-50 GX |
|---|---|
| DC Input Voltage Range | 38 – 60 V |
| AC Output Voltage and Frequency | 230 V ± 2% | 50 Hz ± 0.1% (adjustable up to 60 Hz) |
| Rated Output Power (25°C) | 6 kW |
| Rated Output Power (40°C / 65°C) | 5.7 kW / 4.6 kW |
| Time-Limited Power | 6.5 kW (for 4 hours) | 8 kW (for 1 hour) |
| Peak Output Power | 11 kW (for 1 minute) |
| Maximum Efficiency | 96% |
| AC Input Voltage (Charger) | 187 – 265 V (45 – 65 Hz) |
| Maximum Battery Charge Current (25°C) | 100 A |
| Absorption / Float Charge Voltage | 57.6 V / 55.2 V |
| Maximum Integrated Bypass Current | 50 A |
| Built-in Communication Interfaces | BMS-Can, Wi-Fi, Ethernet, VE.Direct, USB, VE.Bus |
| Programmable Relay | Yes (2x), for signaling or automatic generator start |
| Enclosure Material, Color, and Protection | Steel, Blue RAL 5012, IP21 protection class |
| Device Weight | 29 kg |
| Dimensions (HxWxD) | 644 x 320 x 150 mm |
Interface Panel and Connections
- VE.Bus — dedicated communication port for synchronizing inverters with each other.
- BMS-Can — dedicated high-speed port for direct digital communication with the BMS of lithium batteries (not compatible with VE.Can).
- M8 Bolts — heavy-duty power terminals for secure fastening of thick DC cables from the battery.
- 13 mm² (6 AWG) Screw Terminals — for convenient and safe connection of 230 V AC input and output lines.