Victron Energy MultiPlus-II 48/3000 Inverter/Charger with PowerAssist and UPS Function

MultiPlus-II 48/3000 - 35-50 - 120V - UL Approved

The MultiPlus-II, an inverter/charger, combines the functions of the MultiPlus and the MultiGrid. It has all the features of the MultiPlus, plus an external current transformer option to implement PowerControl and PowerAssist and to optimize self-consumption with external current sensing (max. 32A). It also has all the features of the MultiGrid with built-in anti-islanding and increasingly long list of country approvals.

PowerAssist

The MultiPlus-II will prevent the overload of a limited AC source, such as a generator or shore power connection. First, battery charging will automatically be reduced when otherwise an overload would occur. The second level will boost the output of a generator or shoreside supply with power taken from the battery.

ESS: Energy Storage Systems

The MultiPlus-II is the key component in a Victron ESS system, providing the flexibility to combine with MPPT Solar Chargers or Grid-tie PV Inverters.

Uninterrupted AC power (UPS function)

In the event of a grid failure, or when shore or generator power is disconnected, the inverter within the Multi is automatically activated and takes over the supply to the connected loads. This happens so fast (less than 20 milliseconds) that computers and other electronic equipment will operate without disruption.

Remote Monitoring and Control

When coupled with a GX device (e.g. Cerbo GX) you can monitor and control your Multi and system or systems' locally (LAN) or remotely via the internet from anywhere in the world, using the free VRM app and free VRM portal website. Access can be from a phone, tablet, laptop or PC for multiple operating systems. There is no end to the level of control, from adjusting your Multi to auto starting a backup generator and more.

Specifications:

• PowerControl PowerAssist: Yes
• Transfer Switch: 50A
• Maximum AC Input Current: 50A

Inverter Specifications:

• DC Input Voltage Range: 38 66 V
• Output: Output Voltage 120 VAC 2% / Frequency 60 Hz 0,1% (1)
• Continuous Output Power at 25C (3): 3000 VA
• Continuous Output Power at 25C: 2400 W
• Continuous Output Power at 40C: 2200 W
• Continuous Output Power at 65C: 1700 W
• Maximum Apparent Feed-In Power: 2500 VA
• Peak Power: 5500 W
• Maximum Efficiency: 95%
• Zero Load Power: 11 W
• Zero Load Power in AES Mode: 7 W
• Zero Load Power in Search Mode: 2 W

Charger Specifications:

• AC Input: Input Voltage Range 90-140 VAC / Input Frequency: 45 65 Hz
• Charge Voltage 'Absorption': 57,6 V
• Charge Voltage 'Float': 55,2 V
• Storage Mode: 52,8 V
• Maximum Battery Charge Current (4): 35 A
• Battery Temperature Sensor: Yes

General Specifications:

• Auxiliary Output: Yes (32 A)
• External AC Current Sensor (optional): 100 A
• Programmable Relay (5): Yes
• Protection (2): a g
• VE.Bus Communication Port: For parallel, split phase and three phase operation, remote monitoring and system integration
• General Purpose Com. Port: Yes, 2x
• Remote On-Off: Yes
• Operating Temperature Range: -40 to +65C (-40 150 F) (fan assisted cooling)
• Humidity (Non-Condensing): Max 95%

Enclosure Specifications:

• Material Color: Steel, blue RAL 5012
• Protection Category: IP22
• Battery-Connection: M8 bolts
• 120 V AC-Connection: Screw terminals 13 mm (6 AWG)
• Weight: 9 kg
• Dimensions (hxwxd) (mm): 536 x 275 x 147

Standards:

• Safety: EN-IEC 60335-1, EN-IEC 60335-2-29, UL458
• Emission, Immunity: EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3

*Note: For a short period of time this product was called MultiGrid-II.

The Victron Energy MultiPlus-II 48/3000 is a versatile inverter/charger designed for reliable power management in off-grid, grid-tied, and energy storage systems. Combining the features of both the MultiPlus and MultiGrid, this unit offers seamless integration of power conversion, backup power, and system monitoring. With an innovative PowerAssist feature, it prevents overloads on limited AC sources, such as generators or shore power, by reducing battery charging or boosting output when necessary. This allows for optimized use of available power resources, making it ideal for remote or hybrid energy setups. The device's built-in anti-islanding protection and broad country approvals ensure safety and compliance across various regions. It supports external current sensing with an optional current transformer (up to 32A), enabling advanced system functionalities like PowerControl and PowerAssist, which enhance system efficiency and self-consumption. The multi-functional design makes it a core component in energy storage systems, especially when combined with MPPT solar chargers or grid-tie PV inverters, providing flexible and scalable solutions for renewable energy integration. The MultiPlus-II also features a rapid transfer switch and a built-in UPS function, delivering automatic, uninterrupted power supply during grid outages in less than 20 milliseconds. This ensures continuous operation of sensitive electronics like computers and medical devices without interruption. When paired with a Victron GX device, such as the Cerbo GX, users can remotely monitor and control their systems via the VRM app and web portal, enabling real-time system management from smartphones, tablets, or computers worldwide. The device’s robust construction includes a steel enclosure with protection rated at IP22, designed for durability in demanding environments. Its comprehensive specifications include a maximum input current of 50A, a continuous output power of 2,400W at 25°C, and peak power of 5,500W, with efficiencies reaching up to 95%. The charger supports a wide input voltage range and has programmable charge voltage settings, accommodating various battery chemistries and configurations. Additional features include a programmable relay, auxiliary output, remote on/off, and optional external current sensor, providing extensive customization options for complex systems. The unit is engineered for reliable operation across a temperature range from -40°C to +65°C, with fan-assisted cooling for thermal management. Overall, the Victron MultiPlus-II 48/3000 is an advanced, feature-rich solution for power conversion, backup, and energy storage applications, ensuring efficient, safe, and remote system control in diverse environments.

Features:

• PowerAssist: Prevents overloads by reducing charging or boosting output from battery during limited AC source overloads

• Transfer Switch: 50A for seamless transfer between grid, generator, and inverter power

• Maximum AC Input Current: 50A for high power capacity

• DC Input Voltage Range: 38 to 66 V for flexible battery and system configurations

• Output Voltage and Frequency: 120 VAC at 60 Hz with high accuracy

• Continuous Power Output: 2400 W at 25°C, with peak power up to 5500 W for demanding loads

• High Efficiency: Up to 95% for optimized energy use

• UPS Function: Automatic transfer within 20 milliseconds during grid failure for continuous power

• Remote Monitoring: Compatible with Victron GX devices for remote system control via VRM app and portal

• Robust Enclosure: Steel construction with IP22 protection rating for durability

• Battery Management: Supports programmable charge voltages and battery temperature sensing

• Multiple Communication Ports: VE.Bus, general purpose, and remote control interfaces for system integration

• Operational Range: -40°C to +65°C with fan-assisted cooling and humidity tolerance up to 95%