Victron Energy Inverter/Charger 3kW MultiPlus-II 48/3000/35-50 PMP482305102

The Victron Energy MultiPlus-II 48/3000/35-50 120V is a 3,000VA pure sine wave victron inverter charger that adds full ESS (Energy Storage System) functionality to the proven MultiPlus platform—enabling grid-parallel self-consumption, automatic battery backup, and programmable feed-in prevention in a slim 5.8 in. deep, UL1741-listed enclosure. At 95% maximum efficiency and just 2W in search mode idle, it is built for 48V installations where continuous operation and low parasitic draw both matter.

Key specifications

• Continuous output power: 3,000VA / 2,400W at 77°F (25°C); 2,200W at 104°F (40°C); 1,700W at 149°F (65°C)
• Peak power: 5,500W
• AC output voltage / frequency: 120VAC ±2%; 60Hz ±0.1%
• DC input voltage: 48V nominal (38–66VDC operating range)
• AC input: Single input; 90–140VAC; 45–65Hz; 50A integrated transfer switch; 50A maximum AC input current
• Battery charger: 35A maximum; absorption 57.6VDC; float 55.2VDC; storage 52.8VDC; battery temperature sensor included
• Maximum efficiency: 95%
• Zero load power: 11W (on); 7W (AES mode); 2W (search mode)
• Auxiliary output: 32A (live only when AC input is present)
• External AC current sensor: Optional 100A sensor for PowerControl, PowerAssist, and self-consumption optimization
• Programmable relay: Yes (alarm, DC undervoltage, generator start/stop)
• Communication: VE.Bus (parallel/split-phase/three-phase, remote monitoring); 2× general purpose ports; remote on/off
• Operating temperature: −40°F to 140°F (−40°C to 60°C); humidity max. 95% non-condensing
• Enclosure: IP22; steel (blue RAL 5012)
• Certifications: UL1741; UL458; EN-IEC 60335-1, EN-IEC 60335-2-29, CSA C22.2 107.1-16
• Dimensions: 22.5 H × 10.9 W × 5.8 D in. (572 × 277 × 147 mm); 42 lbs. (19 kg)

ESS functionality: grid-parallel self-consumption

The defining capability of the MultiPlus-II over a standard inverter charger is its built-in ESS functionality. With an optional external 100A AC current sensor, the MultiPlus-II monitors real-time grid consumption and uses that data to optimize battery discharge for self-consumption—drawing from the battery to offset grid import before pulling from the utility. It can also be configured to prevent grid feed-in entirely, avoiding regulatory complications in markets where export is restricted or uncompensated. In a grid outage, it seamlessly transitions to battery-backed inverter mode in under 20ms, keeping critical loads online without interruption. These three modes—self-consumption, feed-prevention, and backup—can be configured simultaneously through Victron's ESS Assistant software.

PowerControl and PowerAssist on a 48V platform

PowerControl sets a ceiling on AC input current draw so the MultiPlus-II accounts for other running loads before charging the battery, preventing nuisance breaker trips on limited grid connections or undersized generators. PowerAssist extends this further: when instantaneous load demand exceeds what the single AC input can supply alone, the battery supplements the shortfall in real time—allowing a smaller generator or limited shore power supply to serve loads that would otherwise overload it. When demand subsides, the surplus capacity recharges the battery automatically.

Two AC outputs for load management

The main AC output transfers to battery-backed power in under 20ms when grid input fails—fast enough to keep computers, networking hardware, and sensitive electronics running without disruption. The 32A auxiliary output is live only when AC input is present, making it the correct connection for loads that must never draw from the battery—resistance heaters, water heaters, and other high-consumption appliances that would deplete storage unnecessarily during an outage. This built-in separation eliminates the need for external load-shedding contactors in most residential and light commercial installations.

Application scenarios

• Grid-tied residential ESS: Solar-charged 48V battery system with self-consumption optimization, feed-prevention, and seamless sub-20ms backup for critical loads.
• Off-grid cabin or small home: Standalone 48V system with generator backup via PowerAssist—a smaller generator handles full household loads without overloading.
• Marine and mobile: At 5.8 in. deep and 42 lbs., the slim profile fits equipment spaces where full-depth inverter chargers cannot be mounted.
• Scalable three-phase systems: Three units configure for three-phase output via VE.Bus; up to six sets of three units parallel for 75kW / 90kVA and over 1,200A of charging capacity.

VE.Bus ecosystem and remote monitoring

The MultiPlus-II 48/3000/35-50 integrates fully into Victron's VE.Bus architecture for parallel, split-phase, and three-phase multi-unit configurations. Paired with a Cerbo GX or Ekrano GX, it connects to Victron's VRM portal for free remote monitoring, remote settings changes, and alarm delivery by email or push notification. On-site options include the Digital Multi Control Panel, VE.Bus Smart Dongle for Bluetooth access via the VictronConnect app, and the Interface MK3-USB for full configuration via VEConfigure software. Two general-purpose communication ports support lithium-ion BMS communication and other system integration needs.

System compatibility

The MultiPlus-II 48/3000/35-50 operates on a 48V battery bank across 38–66VDC and supports lithium-ion (including LiFePO4) and lead-acid chemistries with a built-in battery temperature sensor. The optional 100A external AC current sensor (sold separately) is required to activate ESS self-consumption and feed-prevention modes. AC wiring uses 13mm² (6 AWG) terminals; battery connections use M8 bolts. It integrates natively with Victron MPPT solar chargers, GX monitoring devices, SmartShunt and BMV-712 battery monitors, and Victron lithium battery systems. Off-grid, grid-interactive, and ESS configurations are deployed via Victron's Assistant software framework through VE.Bus.

Why choose the Victron Energy MultiPlus-II 48/3000/35-50?

The Victron Energy MultiPlus-II 48/3000/35-50 120V is the right choice for 48V system builders who need a UL1741-listed victron inverter charger with built-in ESS capability—self-consumption optimization, feed-prevention, and sub-20ms grid backup—in a slim, wall-mount enclosure that fits where full-depth units cannot. At 95% efficiency, 2W search mode idle, and deep integration with the VE.Bus and VRM ecosystem, it brings professional-grade energy management to residential and light commercial installations without requiring a separate energy management controller.