Hybrid Inverter Victron MultiPlus-II 24V 5000VA/120-50

Victron MultiPlus-II 24V 5000VA Hybrid UPS : The ESS Premium Solution

The Victron MultiPlus-II 24V 5000VA/120-50 represents European excellence in hybrid inverters. Manufactured in the Netherlands by Victron Energy, this multifunctional inverter/charger integrates three essential functions in a compact casing: a 5000 VA pure sine wave inverter, a 120 A intelligent charger and an ESS (Energy Storage System) for optimised photovoltaic self-consumption.

Why choose the MultiPlus-II 24V 5000VA?

Unlike standard inverters, the MultiPlus-II provides intelligent management of solar energy, the electricity grid and battery storage. Its unique PowerAssist function adds up to an extra 5000 W to your grid power at peak times, while PowerControl prevents circuit breakers from tripping by limiting the battery recharge current according to your subscription.

With a switchover time of less than 20 milliseconds, your sensitive IT and electronic equipment will never be interrupted in the event of a power cut.

Performance and Technical Specifications

ESS system: Optimised and certified self-consumption

The MultiPlus-II 24V natively integrates ESS (Energy Storage System) functions, enabling you to maximise your solar self-consumption rate while complying with Belgian and European regulations. The system offers three operating modes:

• Optimised self-consumption mode: uses solar energy as a priority, stores the surplus in the batteries and avoids any unwanted re-injection into the grid thanks to the external current sensor (optional).
• Backup/UPS mode: Automatically switches to the batteries in less than 20 ms during a mains power cut, ensuring total continuity for your sensitive equipment.
• Peak Shaving Mode: Reduces consumption peaks by discharging the batteries at peak times, optimising your electricity bill.

The integrated anti-islanding function ensures compliance with safety standards and national certifications (Belgium, France, Germany, Netherlands, Italy, Spain).

PowerControl and PowerAssist: Unique functionalities

PowerControl monitors your total consumption in real time and automatically limits the battery recharge current so that you never exceed the set limit (mains or generator). No need to worry about your main circuit breaker tripping unexpectedly.

PowerAssist goes even further: when a power-hungry appliance (heat pump, washing machine, oven) starts up and temporarily exceeds the power available from the mains, the MultiPlus-II instantly compensates by drawing on the batteries. The result: you have up to 5000 VA of additional total power, while staying within your meter limit.

Two independent AC outputs

The architecture with two AC outputs offers intelligent load management:

• Output 1 (priority) : Uninterruptible power supply (UPS) for critical equipment - IT, servers, alarms, refrigeration, essential heating systems.
• Output 2 (32A): Non-priority loads active only when mains power is available - water heaters, air conditioning, washing machines, EV chargers.

Configuration and Advanced Supervision

Configuration is carried out using the free VEConfigure software and an MK3-USB interface (sold separately). For complete monitoring and remote supervision, the MultiPlus-II connects to Victron GX controllers (Cerbo GX, Ekrano GX, Venus GX), giving access to the free VRM Cloud portal:

• Real-time display of production, consumption and battery status
• Detailed history over several years
• Email alerts in the event of anomalies
• Remote modification of parameters
• OTA (Over The Air) firmware updates

To find out more about the Victron ecosystem, see our complete guide to MultiPlus-2, SmartSolar and Cerbo GX.

Scalability: Parallel and 3-phase configurations

The MultiPlus-II 24V 5000VA can operate in parallel or three-phase configuration to adapt to your future needs:

Battery compatibility and sizing

The MultiPlus-II 24V accepts all types of rechargeable batteries with pre-programmed charging profiles:

• Lithium LiFePO4: Best choice (95% efficiency, 3000-6000 cycles, low weight). CAN-bus communication with Pylontech, BYD, Victron LiFePO4 Smart batteries.
• AGM: Excellent value for money (85% efficiency, 500-800 cycles), ideal for occasional backup.
• Gel: Suitable for extreme temperatures (85% efficiency, 800-1200 cycles).
• OPzV: Maximum lifetime for stationary installations (15-20 years).

Typical applications

The MultiPlus-II 24V 5000VA is suitable for a wide range of applications:

• Residential with solar self-consumption: 3-6 kWp panels, 200-400 Ah lithium batteries, 70-90% self-consumption rate.
• Off-grid installation (isolated site): Solar generation + MPPT controller + 3-5-day battery back-up + optional generator.
• Marine applications and motor homes: shore power/generator with current limiting, PowerAssist for peak starting.
• Corporate emergency back-up: Instantaneous failover < 20 ms, protection of sensitive equipment, remote supervision.

Wattuneed resources and tools

To size your installation and optimise your solar project, use our free tools:

• Voltage drop calculator to size your DC and AC cables
• Battery storage profitability calculator
• Advanced solar simulator to estimate your production and profitability
• Photovoltaic sizing guide

Installation and Compliance

Installation of the MultiPlus-II 24V must comply with Belgian and European electrical standards:

• Location : Dry technical room, 0-40°C, sufficient ventilation, vertical wall mounting mandatory
• DC wiring: Minimum cross-section 35 mm² for 24V battery (< 3m), appropriate DC fuse
• AC wiring: Cross-section in accordance with standard (minimum 10 mm² for 50A), 30 mA type A or B earth leakage circuit breaker
• ESS certifications: Synergrid compliant (Belgium), C15-712-1 (France), VDE-AR-N 4105 (Germany)

Although technically accessible to experienced DIY enthusiasts, Wattuneed recommends using the services of an approved installer to guarantee compliance, optimise configuration and benefit from any guarantees and bonuses.

For any technical questions, please consult our dedicated support platform.

Maintenance and warranty

The MultiPlus-II is designed to operate for 15-20 years with minimal maintenance:

• Every 6 months: Cleaning of ventilation grilles, visual check of connections
• Every year: AC/DC terminal clamping check, mains/battery toggle test
• Every 2 years: Firmware update if new features available

Victron Energy offers a 5-year manufacturer's warranty covering manufacturing defects and defective components. As an official distributor, Wattuneed provides full technical support before and after purchase.