Product Summary:
The Victron MultiPlus-II 12/3000/120-50 (3kVA) Inverter/Charger is a versatile, high-performance solution designed for mobile, marine, backup, and off-grid energy systems. Delivering 3,000VA of pure sine-wave output with an integrated 120A battery charger, it provides reliable, efficient power management in a compact, all-in-one unit.
Built with Victron’s advanced PowerControl and PowerAssist technologies, the MultiPlus-II intelligently manages incoming AC power from grid, generator, or shore sources – preventing overload while supplementing peak demand with battery power when needed. This ensures stable operation and optimal energy use in dynamic environments.
Certified to UL 458 standards, this inverter/charger is ideal for RV and marine applications, offering safe and compliant performance. When paired with Victron GX devices, users gain full remote monitoring and system control, making it a powerful and flexible solution for modern energy systems.
Ships From: Texas, USA
Warranty: 5 Years
Support: Lifetime USA-Based Tech Support
Compatibility
Battery Compatibility:
- Designed for 12V HUSKY2 INV battery systems
- Compatible with LiFePO₄, AGM, and lead-acid batteries
System Compatibility:
- Supports off-grid, mobile, and backup power systems
- Compatible with solar charge controllers and AC-coupled systems
- Works with Victron GX devices for advanced monitoring and control
- Suitable for RV, marine, and hybrid energy setups
Key Features
- 3,000VA Output Power – Reliable energy for mobile and off-grid applications
- Pure Sine Wave Output – Clean, stable power for sensitive electronics
- 120A Integrated Battery Charger – Fast, efficient battery charging
- PowerControl Technology – Prevents overload of generator or shore power
- PowerAssist Functionality – Supplements peak loads using battery power
- UL 458 Certified – Approved for RV and mobile applications
- Hybrid System Capability – Supports AC coupling and ESS configurations
- Remote Monitoring Ready – Full system visibility with Victron GX devices
- Compact All-in-One Design – Inverter and charger in a single unit
- Flexible Energy Inputs – Works with grid, generator, and solar systems
- Maintenance-Free Operation – No routine servicing required
A premium inverter/charger solution built for intelligent energy management, flexibility, and reliable performance in mobile and off-grid environments.
12V Victron MultiPlus-II 12/3000/120-50 (UL 458)
Authorized Distributor | Full Vendor Warranty Included
Choose Your Inverter Option*
Choose Your Battery Option*
Choose Your Inverter Quantity*
Standard
Large
3 Phase
-
Features
- High PV Input Voltage
- Low-Frequency Pure Sine Waveform
- Multifunctional Split-Phase Output
- Integrated MPPT Charge Controller
- Integrated Pure Copper Transformer
- Configurable Grid or Solar Input Priority
- WiFi Remote Monitoring
- Overload, Short Circuit, & Deep Discharge Protections
- CAN/RS485 Protocols for BMS Communications
- In-Depth LCD Display
- Charging, Status, & Fault Indicators
- Compact & Reliable
Suitable For
- 12V Battery Systems
- Residential Solar Systems
- Mid-Sized Off-Grid Systems
- Backup Power Systems
- Self-Consumption Applications
Inverter Downloads
DOWNLOADInverter Specifications
Features
- High PV Input Voltage
- Low-Frequency Pure Sine Waveform
- Multifunctional Split-Phase Output
- Integrated MPPT Charge Controller
- Integrated Pure Copper Transformer
- Configurable Grid or Solar Input Priority
- WiFi Remote Monitoring
- Overload, Short Circuit, & Deep Discharge Protections
- CAN/RS485 Protocols for BMS Communications
- In-Depth LCD Display
- Charging, Status, & Fault Indicators
- Compact & Reliable
Suitable For
- 12V Battery Systems
- Residential Solar Systems
- Mid-Sized Off-Grid Systems
- Backup Power Systems
- Self-Consumption Applications
Inverter Downloads
DOWNLOADInverter Specifications
Frequently Asked Questions
What does PowerAssist do on a Victron?
PowerAssist lets the MultiPlus-II top up a limited AC supply with battery power. If you are on a 15A campground pedestal and briefly draw more than that, the inverter makes up the difference from the battery instead of tripping the breaker. PowerControl works alongside it, capping how much of the incoming supply goes to charging.
Can the MultiPlus-II charge lithium batteries?
Yes. The integrated 120A charger is configurable for LiFePO4 charge profiles, and the unit supports CAN and RS485 communication with battery management systems. Paired with a 12V Husky 2 INV, the inverter and battery communicate directly instead of the charger working from voltage alone.
Is the MultiPlus-II UL listed for RV use?
Yes, it is certified to UL 458, the standard covering inverters in mobile and RV installations. That matters for insurance, for RV park compliance and for any inspection on a professionally installed system.
Do I need a Cerbo GX with a MultiPlus?
No, the inverter works on its own. A Cerbo GX adds full remote monitoring and system control, letting you see and adjust the system from a phone or laptop and log performance over time. Most people add one once their system includes solar charge controllers and a battery they want to monitor properly.
What is the difference between MultiPlus and MultiPlus-II?
The MultiPlus-II adds an external current transformer input for grid or shore power management up to 100A, improved ESS support for hybrid and grid-interactive systems, and better handling of AC-coupled solar. For an off-grid or mobile build with lithium, the II is the current generation and the one to buy.
