The Victron MultiPlus-II 12/3000/120-32 is a 3000VA inverter charger built around a 12V battery bank, pairing sine wave inversion with a 120A multi-stage charger and a 32A AC input current limiter. It suits off-grid installations, marine and vehicle systems, and backup power setups where one unit needs to both invert and charge.

Key features

• 3000VA continuous inverter output from a 12V DC input.
• 120A multi-stage charger with adaptive algorithm, compatible with lithium, AGM, gel and flooded lead-acid batteries.
• 32A AC input current limiter for shore power or generator supplementation via PowerAssist.
• Built-in transfer switch, typical switchover under 20 milliseconds.
• Two AC outputs: AC-out-1 stays live during a mains failure, AC-out-2 disconnects when running on inverter power.
• VE.Bus communication for GX monitoring and VEConfigure setup, with support for parallel and three-phase operation.

How it works

PowerControl and PowerAssist manage a limited AC source by drawing extra current from the battery bank rather than tripping a breaker, useful on boats, campervans or off-grid cabins where generator or shore supply is capped. The 32A input limit is configurable, letting an installer decide how much of that supply goes to charging versus load. AC-out-2 automatically sheds non-essential loads such as water heaters when the unit switches to battery, cutting drain without manual switching.

Technical specifications

Applications

Off-grid cabins and remote properties needing AC power from a 12V bank, marine installations supplementing shore power at peak demand, and motorhomes or campervans with substantial AC loads.