The Victron MultiPlus II 12/3000/120-32 230 V Inverter/Charger (model PMP122305010) is a multifunctional power conversion unit that combines a pure sine-wave inverter, high-current battery charger, automatic transfer switch and advanced power management in one compact and rugged device. Designed for off-grid solar systems, marine, caravan/RV, mobile and backup power applications, it delivers dependable AC power from a 12 V battery bank while also charging batteries efficiently when AC power is available.
🔌 Core Functionality
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Combined Inverter & Charger – Converts 12 V DC to 230 V AC with a 3000 VA (≈2400 W) pure sine-wave inverter, and features a 120 A multi-stage battery charger to replenish battery banks quickly and intelligently.
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Automatic Transfer Switch (32 A) – Seamlessly switches between AC input (grid/generator/shore power) and inverter output during outages or power source changes, ensuring critical loads stay powered.
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True UPS Capability – In the event of AC input loss, the unit switches to inverter mode in under 20 ms, maintaining uninterrupted power to sensitive electronics.
⚙️ Smart Power Management
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PowerControl – Prevents generator or grid overload by dynamically balancing battery charging and load demand, optimising limited AC source capacity.
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PowerAssist – Boosts available AC power during peak demand by supplementing from battery power, then recharges the batteries when loads drop — ideal for systems with small generators or shore connections.
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Energy Storage System (ESS) Ready – Incorporates features for advanced energy storage integration, including compatibility with solar charge controllers and grid-tie inverters for self-consumption and hybrid systems.
📊 Technical Highlights
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Nominal Inverter Output: 230 V AC, 50 Hz pure sine wave.
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Continuous Power: ~3000 VA (≈2400 W).
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Battery Charger: Up to 120 A multi-stage adaptive charging.
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AC Transfer Capability: 32 A automatic transfer between AC sources.
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Flexible Integration: VE.Bus communication for remote monitoring, expansion (parallel/three-phase), and system control.
📌 Why Choose MultiPlus II?
The MultiPlus II 12/3000/120-32 stands out for its all-in-one design that replaces separate inverters, chargers, and transfer switches — simplifying installation and improving system performance. Its PowerControl and PowerAssist functions help maximise the use of limited AC sources, while its true UPS behaviour and ESS compatibility make it a versatile backbone for off-grid, hybrid and backup power systems.