Victron MultiPlus-II 24/5000/120 front view, marked with a 50 A AC transfer capacity

Victron MultiPlus-II 24/3000/70 front view, marked with a 32 A AC transfer capacity

Victron MultiPlus-II inverter charger front view, showing the blue steel case and the charger and inverter status LED panel

Victron MultiPlus-II front view showing the charger and inverter indicator panel and the AC input and output schematic

Connection area of the Victron MultiPlus-II with the cover removed, showing the AC-OUT-1, AC-OUT-2 and AC-IN terminals, VE.Bus ports, current sense, remote on off, auxiliary relay and the battery terminals

Victron MultiPlus-II with the connection cover removed, showing the terminal layout, cable glands and the main on off switch

Angled view into the Victron MultiPlus-II connection area, showing the AC terminals, battery posts and cable gland entries

Victron Energy

Victron MultiPlus-II 24V Inverter Charger 3kVA and 5kVA

PMP242305010

The MultiPlus-II is a combined pure sine inverter and battery charger with two AC outputs, built for professional marine, vehicle and off-grid work as well as grid-connected energy storage. The 24V models suit larger fixed installations and bigger vehicle builds,…

$1,399.95

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Suited to larger fixed installations, bigger vehicle and motorhome builds, marine work and land based off grid systems. Running at 24V halves the current for the same output compared with 12V, which keeps cable sizes and losses down.

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70A OR 120A CHARGER

Serious charge current back into a 24V bank from shore power or a generator, not a trickle.

SWITCHES OVER IN UNDER 20ms

Fast enough that computers and sensitive gear ride through a mains failure. It is a UPS as well.

2400W OR 4000W CONTINUOUS

With 5500W and 9000W peaks for motors and compressors starting up.

POWERASSIST BOOSTS A SMALL SUPPLY

Covers the shortfall from the battery when a generator or shore supply cannot meet a peak.

5 YEAR VICTRON WARRANTY

Backed by a 5 year limited warranty, with free remote monitoring through the VRM portal.

The 3kVA model is the 24/3000/70-32. It delivers 3000VA, which is 2400W continuous at 25°C, with a 5500W peak for motor startup and short surges, and carries a 70A charger. The 5kVA model is the 24/5000/120-50, delivering 5000VA or 4000W continuous with a 9000W peak and a 120A charger.

Worth knowing before you size a system: continuous output derates with heat. The 3kVA drops to 2200W at 40°C and 1700W at 65°C, and the 5kVA to 3700W and 3000W. In a hot cabinet or enclosed space, design around the 40°C figure rather than the headline one.

Two features do most of the work in practice. PowerAssist lets the unit fill the gap when a generator or shore supply cannot meet a peak, drawing the shortfall from the battery and then recharging it once the load drops, so a small supply can run bigger loads than it otherwise could. PowerControl works the other way, capping the current drawn from that supply so you never trip the source.

The transfer switch changes over in under 20 milliseconds, fast enough that computers and sensitive electronics do not notice, so it doubles as a UPS. There are two AC outputs: the main one is uninterrupted, while the second is live only when AC input is present, which is where a water heater or anything else that must not flatten the battery should go.

Systems scale by paralleling up to six units or configuring three for three phase. Setup is through VEConfigure, and adding a Cerbo GX or similar brings remote monitoring and configuration through the free VRM portal. It works with lead acid and lithium alike, with an adaptive charge algorithm that adjusts to suit.

Pure sine wave inverter, 5500 W peak on the 3kVA and 9000 W on the 5kVA
70 A charger on the 3kVA, 120 A on the 5kVA, suiting both lead acid and lithium
PowerAssist covers a shortfall from a generator or shore supply using the battery, then recharges it when the load drops
PowerControl caps the current drawn from the supply so you never trip the source
Transfer switch changes over in under 20 milliseconds, so it doubles as a UPS
Two AC outputs, the second live only when AC input is present
Up to 94 percent efficient on the 3kVA and 96 percent on the 5kVA
Parallel up to 6 units, or configure three units for three phase
Remote monitoring and configuration through the free VRM portal with a GX device

Model designations3kVA: 24/3000/70-32 5kVA: 24/5000/120-50

InverterContinuous Output at 25 degrees C: 3000 VA or 2400 W on the 3kVA, 5000 VA or 4000 W on the 5kVA Continuous Output at 40 degrees C: 2200 W on the 3kVA, 3700 W on the 5kVA Continuous Output at 65 degrees C: 1700 W on the 3kVA, 3000 W on the 5kVA Peak Power: 5500 W on the 3kVA, 9000 W on the 5kVA Maximum Efficiency: 94 percent on the 3kVA, 96 percent on the 5kVA Zero Load Power: 13 W on the 3kVA, 18 W on the 5kVA Output Voltage: 230 VAC plus or minus 2 percent, 50 Hz DC Input Range: 19 to 33 V

ChargerMaximum Charge Current: 70 A on the 3kVA, 120 A on the 5kVA AC Input Range: 187 to 265 VAC, 45 to 65 Hz Absorption Voltage: 28.8 V Float Voltage: 27.6 V Storage Voltage: 26.4 V Transfer Switch: 32 A on the 3kVA, 50 A on the 5kVA Transfer Time: Under 20 milliseconds

GeneralOperating Temperature: Minus 40 to plus 65 degrees C, fan assisted cooling Enclosure: Steel, blue RAL 5012, IP22 Weight: 19 kg on the 3kVA, 30 kg on the 5kVA Parallel and Three Phase Capable: Yes, up to 6 units

3kVA: 499mm H x 268mm W x 141mm D, 19 kg

5kVA: 607mm H x 330mm W x 149mm D, 30 kg

Everything this install needs

0 of 0 in the box

Wall mounted, steel enclosure rated IP22. It is not weatherproof, so it must be mounted inside a protected space.
Cooling is fan assisted, so allow clear airflow. Continuous output derates with heat - design around 2200 W at 40 degrees C on the 3kVA, or 3700 W on the 5kVA.
Battery connection is by M8 bolts on the 3kVA and four M8 bolts on the 5kVA. Size the DC cable for the full charge and inverter current.
AC connection is by screw terminals accepting up to 13 mm2, which is 6 AWG.
The second AC output is live only when AC input is present. Put loads that must not flatten the battery, such as a water heater, on that output.
Set the AC input current limit to suit the shore supply or generator so PowerControl can do its job.
Configuration is through VEConfigure, which needs a computer and an MK3-USB interface. A Cerbo GX or similar adds remote monitoring through the VRM portal.
All 230V work must be carried out by a licensed electrician and comply with the relevant standards.

Q: Should I choose the 3kVA or the 5kVA?
A: The 3kVA gives 2400 W continuous with a 5500 W peak and a 70 A charger. The 5kVA gives 4000 W continuous with a 9000 W peak and a 120 A charger. Size on the continuous figure your loads actually need, then check the peak covers your largest motor start.

Q: Why 24V rather than 12V?
A: At 24V the current is halved for the same output, so cables are smaller, losses are lower and efficiency is better. It suits larger fixed installations and bigger vehicle builds. If your battery bank is 12V, use the 12V model instead.

Q: Does the output derate?
A: Yes. The 3kVA drops from 2400 W at 25 degrees C to 2200 W at 40 and 1700 W at 65. The 5kVA drops from 4000 W to 3700 W and 3000 W. In a hot or enclosed space design around the 40 degrees C figure.

Q: What does PowerAssist actually do?
A: It lets a small supply run bigger loads than it should. If a generator or shore supply cannot meet a peak, the MultiPlus-II makes up the shortfall from the battery, then recharges the battery once the load drops. PowerControl is the other half, capping what is drawn from that supply so you never trip it.

Q: Can I use it as a UPS?
A: Yes. The transfer switch changes over in under 20 milliseconds, quick enough that computers and sensitive electronics keep running through a mains failure.

Q: What is the second AC output for?
A: It is live only while AC input is present, so it drops out when you lose mains. Put anything on it that must not flatten the battery, a water heater being the usual example.

Q: Will it charge lithium?
A: Yes. The adaptive charge algorithm supports both lead acid and lithium, with charge voltages configurable to suit the battery.

Q: Can I add more capacity later?
A: Yes. Up to six units can run in parallel, and three of the same model can be configured for three phase output.

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