Victron Energy MultiPlus-II 48/3000/35-50 120V Inverter/Charger – PMP482305100

Product Overview

The Victron Energy MultiPlus-II 48/3000/35-50 120V VE.Bus is a powerful, integrated inverter/charger designed for 48V battery systems requiring a dependable 120V AC power supply. Combining a pure sine wave inverter, an intelligent battery charger and an automatic AC transfer switch, it provides an efficient solution for marine installations, mobile power systems, off-grid applications and compatible backup-power setups.

With a 3,000VA inverter capacity and a 35A battery charger, the MultiPlus-II combines essential power conversion and battery charging functions in a single unit. Its advanced power-management features, including PowerControl and PowerAssist, help make the most of a limited external AC supply while supporting reliable power delivery to connected equipment.

Inverter Performance

The integrated inverter converts 48V DC battery power into a stable 120V AC output with a pure sine wave. This waveform is suitable for many types of electrical equipment, including compatible electronic devices, appliances and other AC loads within the inverter's rated capacity.

The unit is rated at 3,000VA, with continuous active power output depending on operating temperature and load characteristics. The manufacturer's specifications state approximately 2,400W continuous output at 25°C, 2,200W at 40°C and 1,700W at 65°C. Peak power is rated at 5,500W for short-duration demands.

The inverter's DC input operating range is 38–66V, making it suitable for correctly designed 48V battery systems. Adequate battery capacity, correctly sized cabling and suitable DC protection are essential for reliable operation.

Integrated 35A Battery Charger

The built-in battery charger delivers up to 35A of charging current under the specified operating conditions. When an appropriate external AC source is available, the unit can supply connected loads while charging the battery bank.

Victron's charging technology supports controlled charging stages, helping maintain battery performance when the unit is correctly configured for the battery chemistry and manufacturer's charging recommendations. Battery temperature sensing is supported to help manage charging appropriately.

Automatic AC Transfer Switch

The MultiPlus-II incorporates a 50A transfer switch, allowing it to change between an external AC supply and inverter-generated power. When suitable incoming AC power is available, the system can pass this power through to connected loads and charge the batteries. If the incoming supply is interrupted, the inverter can take over to help maintain power to supported equipment.

The model supports a maximum AC input current of 50A. The incoming supply, transfer arrangements and connected circuits must be designed to remain within the manufacturer's ratings and applicable electrical requirements.

PowerControl and PowerAssist

PowerControl helps prevent an external AC source from being overloaded by limiting the current drawn from it to a configured maximum. This is particularly useful when operating from a generator or a shore-power connection with limited capacity.

PowerAssist can supplement a restricted external AC supply with energy from the battery when connected loads temporarily require more power than the incoming source can provide. This helps accommodate variable demand while making better use of the available electrical supply.

These functions make the MultiPlus-II useful for installations where incoming power is limited but connected loads may fluctuate.

VE.Bus Communication and System Integration

The VE.Bus communication interface supports configuration, monitoring and integration with compatible Victron equipment. Depending on the system design and additional components, the MultiPlus-II can be incorporated into parallel and three-phase installations, as well as suitable monitoring and energy-management systems.

The unit also supports remote on/off control and includes configurable control functions. Compatible Victron monitoring equipment can provide additional visibility of battery status, AC input, inverter operation and system performance.

Suitable Applications

The Victron Energy MultiPlus-II 48/3000/35-50 120V is suited to compatible marine power systems, boats and recreational vehicles using 120V AC equipment, off-grid installations built around 48V batteries, remote power systems and selected backup-power applications.

It is particularly useful where inverter power, battery charging and automatic AC transfer are required in one integrated device. The correct system design will depend on the total connected load, battery capacity, charging requirements and the characteristics of the available AC supply.

Important: This is the 120V AC model. It should not be confused with the 230V version commonly used in UK and European installations. Confirm voltage compatibility before purchasing.

Technical Specifications

Product name: Victron Energy MultiPlus-II 48/3000/35-50 120V VE.Bus.

Product code: PMP482305100.

Product type: Inverter/charger with automatic AC transfer switch.

Nominal battery voltage: 48V DC.

DC input voltage range: 38–66V.

Inverter capacity: 3,000VA.

Continuous active power at 25°C: 2,400W.

Continuous active power at 40°C: 2,200W.

Continuous active power at 65°C: 1,700W.

Peak power: 5,500W.

AC output voltage: 120V AC.

Output frequency: 60Hz, adjustable according to configuration.

Maximum battery charging current: 35A.

Transfer switch rating: 50A.

Maximum AC input current: 50A.

Maximum inverter efficiency: approximately 93%.

Protection rating: IP22.

Communication interface: VE.Bus.

Key functions: Pure sine wave inversion, adaptive battery charging, PowerControl, PowerAssist and automatic AC transfer.

Installation and Compatibility

The MultiPlus-II must be installed according to the manufacturer's instructions and the electrical regulations applicable to the installation. Ensure the battery bank is suitable for a 48V system and can supply the current required by the inverter under expected operating conditions.

Installation should incorporate correctly rated battery cables, DC overcurrent protection, appropriate AC circuit protection, suitable earthing and sufficient ventilation. Battery charging settings must be matched to the installed battery type. Any parallel or three-phase configuration requires compatible equipment and correct system commissioning.

The unit's 120V AC output makes it important to check compatibility with the intended appliances and electrical installation. Professional installation is recommended, particularly for marine, commercial and permanently wired systems.

Product Summary

The Victron Energy MultiPlus-II 48/3000/35-50 120V VE.Bus combines a 3,000VA pure sine wave inverter, 35A battery charger and 50A transfer switch in one integrated power-management unit. With PowerControl, PowerAssist and VE.Bus system integration, it offers a versatile solution for compatible 48V battery installations requiring 120V AC power.