Victron
Victron MultiPlus-II GX 48/4500/55-32 Inverter/Charger
£980.40
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PMP482406000
Victron MultiPlus-II 48/4500/55-32 GX: 4500 VA continuous (4000 W at 25°C), 7000 W / 1 min peak, 55 A charger, 32 A transfer switch. PowerAssist and ESS ready, with a built-in GX device for VRM monitoring.
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Available for collection or delivery in ~2 days
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The Victron MultiPlus-II 48/4500/55-32 GX combines a powerful 48 V sine wave inverter, a battery charger and a fast transfer switch in a single compact enclosure. It is one of the newer-generation MultiPlus-II models, offering more power per kilogram and improved performance at high temperatures. PowerControl lets you cap the current drawn from a limited shore or generator supply, while PowerAssist adds inverter power in parallel with that source to ride through short load peaks without tripping the supply, then recharges the battery once the load eases.
When the incoming supply fails, the unit changes over to inverter operation in less than 20 milliseconds, so connected equipment keeps running without interruption. A second AC output can shed non-essential loads automatically, and an optional external AC current sensor (50 A or 100 A) extends the PowerControl and PowerAssist range for whole-installation current sensing. Up to six units can be paralleled for higher output and three units can be configured for three-phase operation, so the system scales with demand, and it is compatible with Lithium, Lead-acid, Zinc-Bromine and more battery chemistries.
The MultiPlus-II is ESS ready with integrated anti-islanding for safe grid-interactive operation, and is fully configurable through VEConfigure using an MK3-USB interface. As a GX version it has a built-in GX device, so there is no need for a separate Cerbo GX: it provides on-board system monitoring and control and connects directly to the free VRM online portal for remote oversight and settings changes over the internet.
PRODUCT DETAILS
- Combined 48 V inverter, 55 A charger and 32 A transfer switch in one unit
- 4500 VA continuous / 4000 W at 25°C / 7000 W / 1 min peak power
- PowerControl and PowerAssist manage and boost a limited shore or generator supply
- Under-20 ms changeover keeps connected equipment running through a supply failure
- Compatible with Lithium, Lead-acid, Zinc-Bromine and more chemistries
- Parallel and three-phase capable, up to six units in parallel
- ESS ready with built-in anti-islanding for grid-interactive systems
- Built-in GX device, no separate Cerbo GX required
No exploded diagram available for this product.
No compatible transducers listed for this product.
Key specifications
| System voltage | 48 V |
| Continuous output power | 4500 VA |
| Continuous output power at 25°C | 4000 W |
| Peak power | 7000 W / 1 min |
| Maximum charge current | 55 A |
| Transfer switch | 32 A |
Inverter
| DC input voltage range | 38 to 60 V |
| Output voltage / frequency | 230 VAC +/-2%, 50 Hz +/-0.1% |
| Cont. output power at 25°C (VA) | 4500 VA |
| Cont. output power at 25°C (W) | 4000 W |
| Cont. output power at 40°C (W) | 3700 W |
| Cont. output power at 65°C (W) | 3000 W |
| Time-limited power 1 (cold start) | 4.5 kW / 2 h (cold start) |
| Time-limited power 2 (cold start) | 6 kW / 25 min (cold start) |
| Peak power | 7000 W / 1 min |
| Maximum efficiency | 95 % |
| Zero load power | 20 W |
| Zero load power in AES mode | 13 W |
Charger
| Charge voltage 'absorption' | 57.6 V |
| Charge voltage 'float' | 55.2 V |
| Storage mode | 52.8 V |
| Maximum charge current | 55 A |
| Maximum charge current at 40°C | 50 A |
| Battery temperature sensor | Yes |
| Compatible battery chemistries | Lithium, Lead-acid, Zinc-Bromine and more |
Connectivity & control
| Built-in GX device | Yes (integrated monitoring and control, VRM ready, no separate GX device required) |
| VE.Bus communication port | For parallel and three phase operation, remote monitoring and system integration |
| General purpose comms port | Yes, 2x |
| Programmable relay | Yes (general alarm, DC under voltage or genset start/stop) |
| Remote on/off | Yes |
| External AC current sensor (optional) | 50 A or 100 A |
Protection
| Protection | Output short circuit, overload, battery voltage too high, battery voltage too low, temperature too high, 230 VAC on inverter output, input voltage ripple too high |
Environmental
| Operating temperature range | -40 to +65 °C (fan assisted cooling) |
| Humidity (non-condensing) | Max. 95 % |
| Maximum altitude | 4000 m (1%/100 m derating above 2000 m) |
Physical
| Material & colour | Steel, blue RAL 5012 |
| Protection category | IP21 |
| Battery connection | M8 bolts |
| 230 VAC connection | Screw terminals 13 mm² (6 AWG) |
| Weight | 22 kg |
| Dimensions (h x w x d) | 590 x 275 x 149 mm |
Conformance
| Safety | EN-IEC 60335-1, EN-IEC 60335-2-29, EN-IEC 62109-1, EN-IEC 62109-2 |
| Emission / Immunity | EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1/-6-2/-6-3 |
How fast does the MultiPlus-II switch to battery power during a grid failure?
The transfer to inverter operation happens in less than 20 milliseconds, so computers and other electronic equipment continue to operate without disruption.
What do PowerControl and PowerAssist do?
PowerControl lets you set a maximum shore or generator current; the unit then uses only the spare capacity for battery charging to avoid overloading the source. PowerAssist goes further by adding battery power to support the supply during short peaks, then recharges the battery when the load drops.
Can the MultiPlus-II be used in parallel or three-phase systems?
Yes. Up to six units can be connected in parallel for higher output, and three units of the same model can be configured for three-phase operation, with up to six sets of three paralleled for larger systems.
Is an external current sensor required?
No, it is optional. An external AC current sensor (50 A or 100 A) can be added to extend the PowerControl and PowerAssist range and to optimise self-consumption with external current sensing.
Can the MultiPlus-II be monitored remotely?
Yes. When connected to a GX device such as a Cerbo GX, system data can be stored and viewed on the free VRM portal, and settings can be changed remotely over the internet.
What does the GX in this model mean?
This model has a built-in GX device, so it provides system monitoring and control and connects to the free VRM portal without needing a separate GX device such as a Cerbo GX.
