Victron Energy MultiPlus-II 24/3000 Inverter/Charger with PowerAssist and UPS Function

MultiPlus-II 24/3000 - 70-50 - 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: 1933 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: 94%


• Zero Load Power: 13 W


• Zero Load Power in AES Mode: 9 W


• Zero Load Power in Search Mode: 3 W

Charger Specifications:

• AC Input: Input Voltage Range 90-140 VAC / Input Frequency: 45 65 Hz


• Charge Voltage 'Absorption': 28,8 V


• Charge Voltage 'Float': 27,6 V


• Storage Mode: 26,4 V


• Maximum Battery Charge Current (4): 70 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 277 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 24/3000 - 70-50 - 120V is a versatile inverter/charger designed for reliable power management in off-grid, backup, and energy storage systems. It combines the functionalities of the MultiPlus and MultiGrid units, offering seamless integration with energy storage systems and renewable energy sources. Its advanced features include PowerControl and PowerAssist, which prevent overloads from limited AC sources such as generators or shore power and optimize power usage by drawing energy from batteries when needed. The external current transformer option allows for external current sensing up to 32A, enabling precise power management and system optimization.

This model provides uninterrupted power supply (UPS) capabilities, automatically switching to inverter mode in less than 20 milliseconds during grid failures or disconnections. This rapid transfer ensures that sensitive electronic equipment like computers and medical devices operate without interruption. When paired with a Victron GX device, such as the Cerbo GX, users can remotely monitor and control the system via the VRM app or web portal, providing full visibility and control from anywhere in the world. Features like remote start for backup generators and system adjustments enhance operational flexibility.

Built with safety and compliance in mind, the MultiPlus-II includes a 50A transfer switch, a maximum AC input current of 50A, and is UL approved. Its inverter offers a continuous output power of 2,400 watts at 25°C and peaks at 5,500 watts, with a high efficiency of up to 94%. The charger supports battery voltages up to 28.8V with a maximum charging current of 70A, making it suitable for large energy storage setups. The unit operates across a wide temperature range and features multiple communication ports for system integration and remote control. Its robust steel enclosure in blue RAL 5012 and IP22 protection category ensure durability and safety in demanding environments.

Designed for ease of installation and maintenance, the Victron MultiPlus-II weighs approximately 17 pounds and features screw terminal connections for AC and M8 bolts for battery connections. Its compact dimensions make it suitable for a variety of installation configurations. This product complies with international safety and emission standards, including EN-IEC 60335-1, UL458, and IEC 61000 series, ensuring reliable and safe operation worldwide. Whether used in renewable energy systems, backup power solutions, or energy storage projects, the MultiPlus-II provides a comprehensive and scalable power management solution.

Features:

• PowerAssist: Boosts and prevents overloads from limited AC sources

• Uninterrupted Power Supply (UPS): Transitions seamlessly during grid failures

• Remote Monitoring and Control: Access system status anytime via VRM app or web portal

• High Efficiency: Up to 94% for optimal energy use

• Robust Enclosure: Steel case with IP22 protection for durability

• Multiple Communication Ports: For system integration and remote management

• Wide Operating Temperature Range: -40°C to +65°C for versatile installations

• Battery Charging: Supports up to 70A with integrated temperature sensor

• UL Approved: Ensures compliance with safety standards

• Versatile System Integration: Suitable for energy storage, solar, and grid-tie applications