Victron Energy MultiPlus-II Series Victron MultiPlus-II 3000VA 12V Inverter/Charger Model: 12/3000/120-32 230V | Pure Sine Wave | 120A Adaptive Charger The Victron MultiPlus-II 3000VA 12V Inverter/Charger is a comprehensive energy solution designed for reliable, uninterrupted power. This intelligent all-in-one unit seamlessly integrates a powerful pure sine wave inverter, a sophisticated 120A adaptive battery charger, and a high-speed AC transfer switch. It provides a compact and efficient system that delivers consistent 230V AC electricity while intelligently managing battery health and extending lifespan. Ideal for demanding applications, the MultiPlus-II simplifies complex power setups by combining multiple essential functions into a single unit. This reduces cabling and streamlines system management, making it suitable for off-grid installations, marine environments, RVs, and robust backup power systems in the UK. KEY SPECIFICATION: Delivers 3000VA (2400W) continuous power with a 120A adaptive battery charger and 32A transfer switch for 230V systems. Key Features ▶ Integrated Powerhouse — Combines a pure sine wave inverter, adaptive battery charger, and high-speed AC transfer switch. ▶ 3000VA Pure Sine Wave Inverter — Provides 2400W continuous power and 5500W peak power for sensitive electronics and high-demand appliances. ▶ 120A Adaptive 4-Stage Charger — Optimises 12V battery health and extends lifespan with intelligent charging algorithms. ▶ 32A High-Speed AC Transfer Switch — Ensures uninterruptible power (UPS function) with less than 20ms transition time. ▶ PowerControl & PowerAssist — Manages limited AC input and boosts generator/shore power with battery assistance. ▶ Parallel & 3-Phase Capability — Allows scalability for increased power output and complex system configurations. ▶ Auxiliary AC Output (AC-out-2) — Dedicated output for non-critical loads, active only when stable AC input is present. ▶ Remote Monitoring & Control — Compatible with Victron GX devices and VRM portal for global system oversight. ▶ Comprehensive Protection — Built-in safeguards against short circuits, overload, over/under voltage, and overheating. Technical Specifications Parameter Value Input Voltage Range (DC) 9.5 - 17 VDC Output Voltage & Frequency 230 VAC ± 2% @ 50Hz ± 0.1% Continuous Output Power (25°C) 3000 VA (2400W) Peak Power 5500W Maximum Efficiency 93% Zero-Load Power 13W AC Input Voltage Range 187 - 265 VAC (45 - 65 Hz) House Battery Charge Current 120A Transfer Switch Current 32A Auxiliary Output Yes (32A) Operating Temperature -40 to +65 °C Enclosure Protection IP22 Dimensions (H x W x D) 546 x 275 x 147 mm Weight 19 kg Charging & Output Modes Mode/Function Description Adaptive 4-Stage Charging Utilises Bulk, Absorption, Float, and Storage stages to optimise battery charging and prolong battery life. PowerControl Limits AC input current to prevent overload on generators or shore power, prioritising loads and then charging. PowerAssist Supplements limited AC input with power from the battery during peak demand, allowing more equipment to run. WeakAC Mode Enables the charger to operate effectively even with distorted or unstable AC input voltages. Storage Mode Reduces float voltage to minimise gassing and corrosion when batteries are not being discharged for extended periods. Programmable Relay Configurable for various applications, such as generator start/stop signals or as an alarm relay for critical system warnings. Typical Applications Application Description Off-Grid Systems Provides reliable AC power from battery banks for remote homes, cabins, and standalone installations. Marine & RV Power Ensures stable power for boats, yachts, and recreational vehicles, managing shore power, generator, and battery sources. Backup Power Systems Offers seamless transition to battery power during grid failures, keeping essential appliances running. Energy Storage Systems (ESS) Integrates with solar chargers and grid-tie inverters to optimise self-consumption and manage energy flow. Built-In Protection Functions The Victron MultiPlus-II is equipped with comprehensive safety features to protect your system and ensure reliable operation. These include protection against output short circuits • overloads • battery overvoltage • battery undervoltage • overheating • accidental 230 VAC on the inverter output • and excessively high input voltage ripple. Additionally, BatterySafe Mode limits voltage increase during rapid charging to prevent gassing, and Temperature Compensation adjusts charging voltage based on battery temperature, crucial for maintenance-free batteries. Common Questions What is the difference between VA and Watts for this inverter? VA (Volt-Amperes) is the apparent power, while Watts (W) is the real power. For the MultiPlus-II 3000VA, it provides 3000VA of apparent power and 2400W of continuous real power at 25°C. The real power is what actually drives your appliances. Can this inverter/charger be used with different battery types? Yes, the MultiPlus-II features an adaptive 4-stage charging algorithm that can be configured for various battery types, including lead-acid (flooded, GEL, AGM) and lithium (LiFePO4) batteries. Is an external current sensor required for PowerControl and PowerAssist? While the MultiPlus-II has internal current sensing, an optional external AC current sensor (50A) can be added to extend the PowerControl and PowerAssist functions, particularly for optimising self-consumption in ESS applications. How can I monitor and control the MultiPlus-II remotely? By pairing the MultiPlus-II with a compatible Victron GX device (e.g., Cerbo GX, sold separately), you can monitor and control your system locally via LAN/Wi-Fi or remotely over the internet using the free VRM app or VRM portal website. Installation Notes Installation should be performed by a qualified professional in accordance with local electrical regulations. This unit is not supplied with cables. Refer to the official user manual for recommended cable lengths and thicknesses. Ensure adequate ventilation around the unit, as it uses fan-assisted cooling and operates across a wide temperature range. For parallel or 3-phase operation, standard RJ45 UTP cables are required (sold separately). A VE.Bus to USB MK3-USB Interface may be required for advanced configuration and setup via computer. Before You Buy Verify the 12V DC input and 230V AC output match your system requirements. Confirm the 3000VA (2400W) continuous power rating is sufficient for your intended loads. Consider if additional Victron GX devices (e.g., Cerbo GX) are needed for advanced monitoring and control. Review the official Victron Energy datasheet and manual for full technical details and installation guidelines. Ensure you have appropriate battery bank capacity to support the inverter's output and charging capabilities. Please verify all specifications and compatibility with your specific system requirements before purchase. This Victron MultiPlus-II product comes with a 5-year manufacturer warranty.
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