MultiPlus-II 48/3000/35-50 120 volt (UL 1741)

The Victron MultiPlus-II PMP482305102 is a 48V, 120V inverter/charger that combines the features of a MultiPlus with ESS energy storage functionality. It integrates a true sine wave inverter, adaptive battery charger, and automatic transfer switch in one unit for professional marine, yachting, vehicle, and land-based off-grid applications.

PowerControl and PowerAssist help manage limited grid, shore, or generator power. The MultiPlus-II can account for other AC loads and use available remaining power for battery charging, helping prevent overload of the AC source. During short peak-load periods, PowerAssist can supplement the AC source with battery power, then use spare power to recharge the battery once the load decreases.

The MultiPlus-II can be used in off-grid and grid-connected PV systems and is compatible with both solar charge controllers and grid-tie inverters. It also supports parallel, split-phase, and three-phase operation with compatible units, making it suitable for expandable Victron power systems.

Key Features

• 48V DC inverter/charger for 120V AC systems
• MultiPlus-II design with ESS energy storage functionality
• 3000VA true sine wave inverter output
• 2400W continuous output at 25°C
• 5500W peak power
• 35A maximum battery charge current
• 50A transfer switch
• 50A maximum AC input current
• PowerControl and PowerAssist
• Optional external AC current sensor support up to 100A
• Main AC output has no-break functionality
• Transfer to inverter power in less than 20 milliseconds
• Second AC output is live only when AC input is available
• Compatible with off-grid and grid-connected PV systems
• Compatible with solar charge controllers and grid-tie inverters
• Supports parallel, split-phase, and three-phase operation
• VE.Bus communication port for system integration, remote monitoring, and expanded configurations
• Programmable relay
• Two general-purpose communication ports
• Remote on/off capability
• Fan-assisted cooling
• UL1741 listed
• Compatible with Victron GX devices, VRM Portal, VRM app, VE.Bus Smart Dongle, MK3-USB interface, Digital Multi Control Panel, and VictronConnect app

Technical Specifications

• Manufacturer: Victron Energy
• Model: MultiPlus-II 120V 48/3000/35-50
• Part Number: PMP482305102
• DC System Voltage: 48V
• DC Input Voltage Range: 38V to 66V
• AC Output Voltage: 120VAC ± 2%
• Output Frequency: 60Hz ± 0.1%
• Continuous Output Power at 25°C: 3000VA / 2400W
• Continuous Output Power at 40°C: 2200W
• Continuous Output Power at 65°C: 1700W
• Peak Power: 5500W
• Maximum Efficiency: 95%
• Zero Load Power: 11W
• Zero Load Power in AES Mode: 7W
• Zero Load Power in Search Mode: 2W
• Transfer Switch Rating: 50A
• Maximum AC Input Current: 50A
• AC Input Voltage Range: 90V to 140VAC
• AC Input Frequency Range: 55Hz to 65Hz
• Absorption Charge Voltage: 57.6V
• Float Charge Voltage: 55.2V
• Storage Mode Voltage: 52.8V
• Maximum Battery Charge Current: 35A
• Battery Temperature Sensor: Yes
• Auxiliary Output: 32A
• External AC Current Sensor: Optional, 100A
• Programmable Relay: Yes
• VE.Bus Communication Port: Yes
• General Purpose Communication Ports: 2
• Remote On/Off: Yes
• Operating Temperature Range: -40°C to +60°C / -40°F to 140°F
• Cooling: Fan-assisted
• Humidity: Maximum 95%, non-condensing
• Enclosure Material and Color: Steel, blue RAL 5012
• Protection Category: IP22
• Battery Connection: M8 bolts
• AC Connection: 13 mm² / 6 AWG
• Dimensions: 572 x 277 x 147 mm / 22.5 x 10.9 x 5.8 in
• Weight: 19 kg / 42 lb
• Listing: UL1741
• Safety Standards: EN-IEC 60335-1, EN-IEC 60335-2-29, CSA 22.2 107.1-16
• Emission and Immunity Standards: 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

Applications

• Marine electrical systems
• Yachting power systems
• Vehicle power systems
• Land-based off-grid systems
• Energy storage systems
• Grid-connected PV systems
• Backup power systems
• Generator-assisted systems
• Shore power systems
• Critical-load backup installations
• 48V battery-based 120V AC systems

Ideal For

• 48V battery systems requiring 120VAC output
• Professional marine, mobile, and off-grid installations
• Systems that need inverter, charger, and transfer switch functions in one unit
• Installations using limited shore, generator, or grid power
• Victron-based ESS and solar-supported power systems
• Users who need remote monitoring and system integration through Victron GX and VRM
• Systems requiring expandable parallel, split-phase, or three-phase capability
• Applications that need a 3000VA inverter/charger with 48V battery compatibility

Protection Features

• Output short-circuit protection
• Overload protection
• Battery voltage too high protection
• Battery voltage too low protection
• Temperature too high protection
• Protection against 120VAC on inverter output
• Input voltage ripple too high protection

System Compatibility

• Compatible with 48V battery systems
• Designed for 120VAC systems
• Compatible with off-grid PV systems
• Compatible with grid-connected PV and alternative energy systems
• Compatible with solar charge controllers
• Compatible with grid-tie inverters
• Supports VE.Bus communication
• Supports parallel operation with compatible Victron Multi units
• Supports split-phase operation with two units of the same model
• Supports three-phase operation with three units of the same model
• Compatible with Cerbo GX, Ekrano GX, and other compatible GX devices for VRM remote monitoring
• Compatible with VE.Bus Smart Dongle for Bluetooth monitoring and control
• Configurable with VEConfigure software using an MK3-USB interface
• Supports optional 100A external current sensor for PowerControl, PowerAssist, and self-consumption optimization

Check Before Ordering

• Confirm your system uses a 48V DC battery bank.
• Confirm your loads and installation are designed for 120VAC output.
• Verify that 2400W continuous output and 5500W peak power are suitable for your connected loads.
• Confirm the battery bank can safely accept up to 35A charging current.
• Confirm whether the 50A transfer switch and 50A maximum AC input current match your AC system design.
• Confirm whether your application requires ESS functionality, grid-parallel operation, or off-grid operation.
• Check whether an external current sensor or power meter is needed for self-consumption optimization or grid-feed control.
• Verify installation requirements for AC wiring, DC wiring, overcurrent protection, grounding, ventilation, and clearances.
• Confirm whether monitoring or configuration accessories such as a GX device, VE.Bus Smart Dongle, MK3-USB interface, or Digital Multi Control Panel are required.
• For parallel, split-phase, or three-phase systems, confirm that all units are the same compatible model and are configured correctly.