Victron Energy 3000 Watt 48 VDC - 120 VAC (Multi-Plus-II) UL 1741, Pure Sine Wave Inverter/Charger
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Visit CalculatorThe Victron Energy MultiPlus-II 48/3000/35-50 is a high-performance pure sine wave inverter and intelligent battery charger designed for advanced off-grid, backup power, marine, RV, and energy storage applications. Combining a powerful 3000VA inverter, adaptive battery charger, and ultra-fast transfer switch into one compact unit, the MultiPlus-II delivers seamless and reliable power management for demanding energy systems.
Built with Victron’s renowned PowerAssist technology, this inverter/charger prevents overload conditions by supplementing limited AC sources such as generators or shore power with battery power when needed. The MultiPlus-II also supports parallel and three-phase operation for scalable system expansion and integrates easily with Victron’s advanced monitoring and remote management ecosystem.
With UL 1741 certification, split-phase compatibility, programmable relays, and robust safety protections, the MultiPlus-II is ideal for residential backup systems, solar energy storage, RV installations, mobile workstations, and marine applications.


Everything you need is included with your product.
| Specification | Details |
| PowerControl & PowerAssist | Yes |
| Transfer switch | 50A |
| Maximum AC input current | 50A |
| Specification | Details |
| DC input voltage range | 38 – 66 V |
| Output | Output voltage: 120 VAC ± 2%, Frequency:60 Hz ± 0,1 %ᵛ |
| Cont. output power at 25 °C | 3000 VA |
| Cont. output power at 25 °C | 2400 W |
| Cont. output power at 40 °C | 2200 W |
| Cont. output power at 65 °C | 1700 W |
| Peak power | 5500 W |
| Maximum efficiency | 95 % |
| Zero load power | 11 W |
| Zero load power in AES mode | 7 W |
| Zero load power in Search mode | 2 W |
| Specification | Details |
| AC Input | Input voltage range: 90-140 VAC | Input frequency:55 – 65 Hz |
| Charge voltage ‘absorption’ | 57,6 V |
| Charge voltage ‘float’ | 55,2 V |
| Storage mode | 52,8 V |
| Max. battery charge current | 35 A |
| Battery temperature sensor | Yes |
| Specification | Details |
| Auxiliary output | 32 A |
| External AC current sensor (optional) | 100 A |
| Programmable relay | Yes |
| Protection | 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 +60°C (-40 – 140 °F) (fan-assisted cooling) |
| Humidity (non-condensing) | max 95 % |
| Specification | Details |
| Material & Colour | Steel, blue RAL 5012 |
| Protection category | IP22 |
| Battery-connection | M8 bolts |
| 120 VAC-connection | 13 mm² (6 AWG) |
| Dimensions (hxwxd) mm / inch | 572 x 277 x 147 | 22.5 x 10,9 x 5,8” |
| Specification | Details |
| Listings | UL 1741 |
| Safety | EN-IEC 60335-1, EN-IEC 60335-2-29, CSA 22.2 107.1-16, EN 55014-1, EN 55014-2 |
| New Row | EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3 |
What does the MultiPlus-II do?
The MultiPlus-II combines a pure sine wave inverter, battery charger, and transfer switch into one compact system for backup power and energy storage applications.
What is PowerAssist technology?
PowerAssist allows the inverter to supplement limited AC input sources such as generators or shore power with battery energy during periods of high demand.
Can the MultiPlus-II work with solar systems?
Yes. The MultiPlus-II is commonly integrated into solar energy storage systems alongside Victron MPPT solar charge controllers and battery banks.
Is the inverter suitable for sensitive electronics?
Yes. The pure sine wave output provides stable and clean power safe for computers, televisions, medical devices, and communication equipment.
Can multiple units be connected together?
Yes. The MultiPlus-II supports parallel and three-phase configurations for larger power systems.
Does the inverter automatically switch during a power outage?
Yes. The built-in transfer switch automatically changes over to inverter power when utility or shore power is lost.
Is remote monitoring available?
Yes. When paired with Victron GX devices and the VRM portal, users can remotely monitor and manage their systems from anywhere.
What type of batteries are compatible?
The MultiPlus-II supports many battery chemistries including lithium iron phosphate (LiFePO4), AGM, gel, and flooded lead-acid batteries.
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