Overview

The Victron Energy PMP482505300 is a MultiPlus-II 48/5000/70-95 120V inverter/charger for 48V battery systems that need shore power charging, inverter output, and transfer switching in one unit. It pairs a 5000VA pure sine wave inverter with a 70A battery charger and a 95A transfer switch, making it a strong fit for larger onboard AC systems where the battery bank supports high-demand loads.

In inverter mode, the unit outputs 120VAC at 60Hz and can support a 9000VA peak load for short starting surges. The AC input range of 90-140VAC and 45-65Hz gives it flexibility with marina shore power or generator input, while PowerControl and PowerAssist help manage limited AC sources by reducing charging load or supplementing AC demand from the battery bank.

For marine installations, this MultiPlus-II is most relevant on boats with a 48V DC architecture and a planned 120V AC distribution layout. VE.Bus communication supports system integration, remote monitoring, and expanded configurations, including parallel, split-phase, and three-phase setups when the rest of the system is built to match.

Key features

• Combines a pure sine wave inverter, battery charger, and automatic transfer switch in one unit for a cleaner AC power system layout.
• Built for 48V battery banks with 5000VA inverter capacity and 70A charging output.
• 120VAC inverter output at 60Hz supports common North American onboard AC loads.
• 95A transfer switch handles shore power or generator input and changes over quickly when the AC source is lost.
• PowerControl helps prevent overload on a limited shore power pedestal or generator by reducing battery charging when needed.
• PowerAssist can supplement a weak AC source with battery power during short periods of higher demand.
• Two AC outputs allow critical loads to stay powered from the inverter while non-critical loads can be limited to times when AC input is present.
• VE.Bus communication supports remote monitoring, system integration, and scalable configurations with compatible Victron equipment.

Installation and setup

This inverter/charger should be installed as part of a properly planned 48V marine electrical system, with cable sizing, overcurrent protection, ventilation, and AC grounding handled according to the vessel design and applicable marine electrical standards. The unit is intended for a dry, protected mounting area rather than direct spray exposure, so common locations include an electrical locker, technical compartment, or other serviceable space with airflow.

Because it works with both DC battery cabling and 120V AC wiring, installation is normally handled by a qualified marine electrician or technician familiar with inverter/charger systems. Setup should also account for the available shore power or generator capacity, battery chemistry, charge profile, and which onboard loads belong on the inverter-supported output.

Compatibility and system integration

The unit is suited to boats already using, or being upgraded to, a 48V house battery system. It is not a drop-in match for 12V or 24V battery banks unless the DC system is changed to 48V.

VE.Bus support makes it a practical choice for vessels using Victron monitoring and control hardware. In larger systems, matching units can be configured for expanded output, split-phase layouts, or three-phase installations, but those configurations require careful system design and compatible components throughout the AC and DC side.

Use cases on board

This MultiPlus-II makes sense for cruising boats, larger fishing vessels, and liveaboard or expedition-style electrical systems where the 48V battery bank carries meaningful AC loads away from the dock. It is especially useful where shore power or generator capacity is limited and the system needs to balance charging with onboard consumption.

It is also a good match for refits where the electrical system is being built around higher-capacity battery storage, inverter-backed AC circuits, and remote energy monitoring rather than a simple standalone charger.