MultiPlus-II 48/3000/35-32

The Victron Energy MultiPlus-II 48/3000/35-32 is an integrated energy solution combining multiple essential functions into a single device. It acts as a pure sine wave inverter, an adaptive battery charger, and a high-speed AC transfer switch. It is designed for various applications, including standalone systems, marine setups, recreational vehicles, and backup installations.

The MultiPlus-II 48/3000/35-32 inverter delivers continuous power of 3000 VA, which is equivalent to 2400 W at an ambient temperature of 25°C. It can also handle a peak power of 5500 W.

The MultiPlus-II provides an AC output voltage of 230 VAC ± 2%. The output frequency is 50 Hz, but it can be adjusted to 60 Hz according to installation requirements.

The nominal DC input for the MultiPlus-II 48/3000/35-32 is 48 V. The unit supports a DC input voltage range from 38 to 66 VDC.

The built-in charger of the MultiPlus-II 48/3000/35-32 can supply a maximum charging current of 35 A for 48 V battery banks.

For optimal charging of 48 V batteries, absorption voltages are 57.6 V DC and float voltages are 55.2 V DC.

The MultiPlus-II integrates the PowerControl and PowerAssist functions. These functions are designed to prevent overloading of limited AC sources, such as generators or shore power supplies. PowerControl adjusts the battery load, while PowerAssist can supplement AC power if needed by drawing energy from the battery.

Yes, the MultiPlus-II is equipped with a UPS (Uninterruptible Power Supply) function. This function ensures continuous power supply to critical loads in less than 20 milliseconds in the event of a mains power failure, thus guaranteeing service continuity.

The MultiPlus-II has two AC outputs:

The main output features a seamless transfer function, providing continuous power even if the AC input fails. The second output is active only when AC input is present and is typically used for non-essential loads that do not need to be powered in case of a grid failure.

The MultiPlus-II 48/3000/35-32 system achieves a 95% energy efficiency, enabling optimized power conversion and reduced losses.

The idle consumption of the MultiPlus-II varies depending on the operating mode:

Standard mode: 11 W
AES (Automatic Economy Switch) mode: 7 W
Search mode: 2 W

The MultiPlus-II 48/3000/35-32 has IP22 protection, meaning it is protected against solid objects larger than 12.5 mm and against falling water droplets inclined up to 15° from the vertical.

The device dimensions are approximately 506 mm (height) x 275.4 mm (width) x 147.1 mm (depth). These measurements are critical for installation space planning.

The MultiPlus-II 48/3000/35-32 is designed to operate within a wide temperature range, from -40°C to +65°C, with fan-assisted cooling to maintain performance.

To connect an external current transformer to the MultiPlus-II, clip the transformer around the AC conductor. It is crucial to respect the connection direction: the arrow on the current transformer must point toward the MultiPlus. For recent models, the transformer wires connect directly to the external current sensor terminals on the MultiPlus-II. The red wire must be connected to the EXT terminal and the white wire to the COM terminal, as the transformer is polarity-sensitive.

No, the external current transformer cable must not be shortened or lengthened. It is calibrated specifically for use with the current transformer, and any modification could affect measurement accuracy.

Yes, the MultiPlus-II can be connected to lithium battery systems from other manufacturers. For this, the third-party battery management system (BMS) must be capable of controlling the battery’s charge and discharge and providing appropriate signals to the MultiPlus-II.

To connect a third-party lithium BMS, the BMS signals must be two separate potential-free contacts that can be wired to the MultiPlus. On the Multi side, this involves an unisolated analog voltage measurement with a pull-up resistor. It is recommended to use a small potential-free relay for isolation. Additionally, the MultiPlus-II must be updated to the latest firmware version, and the "Two-Signal BMS Support" assistant must be configured via VEConfigure3.

Yes, an external current transformer can be used with the MultiPlus-II to measure AC current on an external conductor. This allows PowerControl and PowerAssist functions to be implemented and optimizes self-consumption by detecting external current. It is particularly useful when a full energy meter installation is not required.

Yes, an external current transformer can be used in a three-phase installation, particularly in an application with an external transfer switch. In this case, one current transformer is required per phase and must be connected to the master unit of that phase. It is important to note that the current transformer only supports single-phase monitoring.