Victron Energy MultiPlus-II 24/3000-70-50 120V Inverter/Charger with PowerAssist and UPS Functionality

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 inverter/charger combines advanced power management features with reliable performance for off-grid and backup power systems. This versatile unit integrates the functions of a high-capacity inverter, charger, and a built-in transfer switch, offering seamless power conversion and distribution in a compact design. Its 3000 VA continuous power output ensures that your critical appliances and electronics operate smoothly during grid outages or fluctuating power conditions. The MultiPlus-II's critical feature is its PowerAssist technology, which prevents overloads by reducing battery charging when necessary and boosting power output from batteries to support peak loads, making it ideal for small generators or shore power connections.

Designed for integration into Energy Storage Systems (ESS), the MultiPlus-II supports combining with MPPT solar chargers or grid-tie PV inverters, enabling flexible renewable energy setups. Its UPS capability ensures uninterrupted power delivery within less than 20 milliseconds during grid or power source failures, safeguarding sensitive electronic equipment such as computers, medical devices, or industrial controls. When paired with a Victron GX device like the Cerbo GX, users can remotely monitor and control system performance via the VRM portal or app, providing real-time insights and operational adjustments from anywhere in the world.

The unit's specifications include a 50A transfer switch, a maximum AC input current of 50A, and a broad input voltage range of 193-333 V DC. Its inverter offers a 120 VAC output with a high efficiency of up to 94%, peak power of 5500 W, and a stable frequency of 60 Hz. The built-in charger can handle up to 70 A of battery charge current and features a comprehensive temperature sensor for optimal charging. The robust steel enclosure is rated IP22 for protection and features M8 bolts for battery connections and screw terminals for AC input. The unit weighs approximately 19 pounds and measures roughly 21.1 inches in length, 10.9 inches wide, and 6.1 inches tall, making it suitable for various installation environments.

Compliance with international safety and emission standards, including UL458 and EN-IEC certifications, ensures reliable operation across different markets. With its advanced features, flexible configuration options, and remote management capabilities, the Victron MultiPlus-II 24/3000-70-50 is a comprehensive solution for reliable power conversion, energy storage, and backup power needs.

Features:

• PowerAssist technology prevents overloads by reducing battery charging and boosting power output

• Built-in UPS functionality provides seamless transition during grid or power source failures

• Supports Energy Storage Systems (ESS) with integration options for MPPT solar chargers and PV inverters

• Remote monitoring and control via Victron GX devices, VRM app, and web portal

• High continuous output power of 3000 VA with peak power up to 5500 W

• Transfer switch rated at 50A with a maximum AC input current of 50A

• Broad input voltage range of 193-333 V DC for flexible power sources

• Efficient inverter operation with up to 94% maximum efficiency

• Robust steel enclosure with IP22 protection suitable for various environments

• Comprehensive safety and emissions compliance including UL458 and EN-IEC standards