Victron
Victron Energy - 48V - 4500W - MultiPlus-II 48/4k5/55-32 - Inverter/Charger
Victron Energy - 48V - 4500W - MultiPlus-II 48/4k5/55-32 - Inverter/Charger
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Victron MultiPlus-II 48V Inverter/Charger with PowerAssist and ESS Integration
Professional-Grade Inverter/Charger for Demanding Off-Grid and Backup Power Systems
The Victron MultiPlus-II is a high-performance multifunctional inverter/charger designed for demanding marine, mobile, and off-grid applications. Combining a robust 230V pure sine wave inverter with a powerful adaptive battery charger, this unit features Energy Storage System (ESS) capabilities, allowing seamless integration with solar, grid-tied, and generator systems for intelligent energy management. Delivering continuous output of 4 kW and peak power of 7 kW, it ensures reliable operation for critical loads even during high-demand periods. The integrated 55 A charger rapidly replenishes your battery bank, minimising generator run time and maximising solar utilisation.
PowerControl & PowerAssist – Intelligent Energy Management
The MultiPlus-II’s PowerControl feature allows precise limitation of AC input current, preventing overload on generators or the grid. PowerAssist extends this functionality by supplementing limited grid or generator power with stored battery energy during peak loads, then recharging the battery once demand decreases. This maximises system efficiency and guarantees uninterrupted power to essential loads, making it ideal for sites with limited shore power or generator capacity.
Seamless AC Supply & Dual Output Functionality
The main AC output delivers uninterrupted power during grid or generator outages, with transfer times under 20 milliseconds, keeping sensitive electronics operational. The secondary AC output is live only when input power is present, ideal for non-critical loads such as water heaters. Both outputs integrate with PowerControl and PowerAssist for smart load management, ensuring critical loads always have priority.
Scalable & Flexible System Configuration
Up to six MultiPlus-II units can be connected in parallel for expanded power capacity. Three units of the same model can be configured for three-phase output, and up to six sets of three units can operate in parallel for very large installations. On-site configuration is simple via VEConfigure software, while real-time monitoring is available through Cerbo GX, Ekrano GX, Digital Multi Control Panel, VictronConnect, or the VRM Online portal.
High Efficiency & Robust Design
With a maximum efficiency of 95%, the MultiPlus-II minimises energy losses while delivering reliable AC power. Its rugged IP21-rated steel enclosure and fan-assisted cooling allow safe operation in temperatures from -40°C to +65°C. Compatible with lithium, lead-acid, and zinc-bromine batteries, it provides flexibility for diverse energy storage systems. The internal transfer switch is rated at 32 A, ensuring safe passage of grid or generator power.
Key Features
- Pure sine wave inverter with 4 kW continuous output and 7 kW peak power
- Powerful 55 A adaptive battery charger for rapid recharging
- PowerControl and PowerAssist prevent AC input overload and supplement limited sources
- Ultra-fast <20 ms transfer switch for uninterrupted UPS-grade backup power
- Parallel and three-phase capable for scalable system design
- Wide -40°C to +65°C operating temperature range with fan-assisted cooling
- Compatible with lithium, lead-acid, and zinc-bromine battery chemistries
- Integrated ESS functionality for advanced solar and grid energy management
- Remote monitoring and control via VictronConnect, VRM portal, or GX device
Applications
- Marine and yachting systems requiring uninterrupted AC power
- Mobile vehicles and off-grid installations
- Residential and commercial solar + battery setups
- High-demand off-grid energy storage and backup power
- Critical load support in professional energy systems
Equip your installation with the Victron MultiPlus-II for advanced energy management, high-efficiency AC power, and seamless support for critical loads in demanding off-grid, mobile, and professional environments. Order your Victron MultiPlus-II inverter/charger today and take control of your energy independence.
Specifications
| PowerControl & PowerAssist | Yes |
|---|---|
| Transfer switch | 32 A |
| Maximum AC input current | 32 A |
| DC Input voltage range | 38-60 V |
| Output | Output voltage: 230 VAC ± 2 % Frequency: 50 Hz ± 0.1 %(1) |
| Cont. output power at 25 °C | 4 kW |
| Cont. output power at 40 °C | 3.7 kW |
| Cont. output power at 65 °C | 3 kW |
| Time-limited power 1 (cold start) | 4.5 kW/2h |
| Time-limited power 2 (cold start) | 6 kW/25min |
| Max apparent feed-in power | 4 kW |
| Peak power | 7 kW/1min |
| Maximum efficiency | 95 % |
| Zero load power | 20 W |
| Zero load power in AES mode | 13 W |
| Zero load power in Search mode | 8 W |
| AC Input | Input voltage range: 187–265 VAC Input frequency: 45-65 Hz |
| Charge voltage 'absorption' | 57.6 V |
| Charge voltage 'float' | 55.2 V |
| Storage mode | 52.8 V |
| Max. battery charge current at 25 °C | 55 A |
| Max. battery charge current at 40 °C | 50 A |
| Battery temperature sensor | Yes |
| Compatible battery chemistries | Lithium, Lead-acid, Zinc-Bromine and more(3) |
| Auxiliary output | Yes (32 A) |
| External AC current sensor (optional) | 50 A or 100 A |
| Programmable relay(4) | Yes |
| Protection(2) | a – g |
| VE.Bus communication port | For parallel and three phase operation, remote monitoring and system integration |
| General purpose com. port | Yes, 2x |
| Remote on-off | Yes |
| Operating temperature range | -40 to +65 °C (-40 – 150 °F) (fan assisted cooling) |
| Humidity (non-condensing) | max 95 % |
| Maximum altitude | 4000m with 1%/100m power derating above 2000m |
| Material & Colour | Steel, blue RAL 5012 |
| Protection category | IP21 |
| Battery-connection | M8 bolts |
| 230 VAC-connection | Screw terminals 13 mm² (6 AWG) |
| Weight kg | 22 |
| Dimensions (hxwxd) mm | 590 x 275 x 149 |
| Safety | EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1, EN-IEC 62109-2 |
| Emission, Immunity | 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 |
| Uninterruptible power supply | IEC 62040 |
| Anti-islanding | IEC 62116 |
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