Descrizione
⚠️ Stock availability and delivery time for products held in the supplier’s stock must be confirmed by phone.
Download the datasheet
Download the manual
Download the Declaration of Conformity
Victron Energy MultiPlus-II 48/4k5/55-32 combines a sine wave inverter and a battery charger in a single unit. It operates with 48V battery systems and delivers 4kW of continuous power at 25°C.
In the event of a grid failure or generator disconnection, the UPS function supplies the connected loads in less than 20ms. The product features two AC outputs: the main output is uninterruptible, while the auxiliary output operates only when an AC source is available at the input.
PowerControl and PowerAssist help manage a limited grid connection or generator. MultiPlus-II can automatically reduce the current used to charge the battery and temporarily supplement the AC source using stored energy.
The model can be integrated into Victron ESS installations, used in parallel or three-phase configurations, and remotely monitored with compatible Victron devices.
Main features
- 48V battery system
- 4kW continuous power at 25°C
- 7kW maximum power for one minute
- Maximum efficiency of 95%
- Maximum charging current of 55A
- 32A transfer switch
- Two 230VAC outputs
- VE.Bus communication port
- Programmable relay
- Remote on/off
- Parallel and three-phase operation
- IP21 protection rating
Recommended applications
- Victron ESS energy storage systems
- Backup power
- Off-grid photovoltaic systems
- Remote homes and cabins
- Motorhomes and mobile applications
- Marine applications
- Generator-powered systems
Technical specifications
| Specification |
Value |
| Manufacturer |
Victron Energy |
| Series |
MultiPlus-II |
| Model |
48/4k5/55-32 |
| Product type |
Inverter/charger |
| Nominal battery voltage |
48V |
| DC input voltage range |
38–60V |
| Output voltage |
230VAC ±2% |
| Output frequency |
50Hz ±0.1% |
| Continuous output power at 25°C |
4kW |
| Continuous output power at 40°C |
3.7kW |
| Continuous output power at 65°C |
3kW |
| Time-limited power, cold start |
4.5kW / 2 hours |
| Time-limited power, cold start |
6kW / 25 minutes |
| Maximum power |
7kW / 1 minute |
| Maximum efficiency |
95% |
| Zero-load power consumption |
20W |
| Zero-load power in AES mode |
13W |
| Zero-load power in Search mode |
8W |
| Transfer switch |
32A |
| Maximum AC input current |
32A |
| AC input voltage range |
187–265VAC |
| AC input frequency |
45–65Hz |
| Maximum battery charging current at 25°C |
55A |
| Maximum battery charging current at 40°C |
50A |
| Absorption charging voltage |
57.6V |
| Float charging voltage |
55.2V |
| Storage mode voltage |
52.8V |
| Auxiliary output |
Yes, 32A |
| Communication |
VE.Bus and 2 general-purpose ports |
| Programmable relay |
Yes |
| Remote on/off |
Yes |
| Operating temperature |
-40°C to +65°C |
| Protection rating |
IP21 |
| Battery connection |
M8 bolts |
| 230VAC connection |
13mm² / 6 AWG terminal block |
| Dimensions (H × W × D) |
590 × 275 × 149mm |
| Weight |
22kg |
Compatibility and important information
The product can be configured for lithium, lead-acid, zinc-bromine and other battery technologies. Battery compatibility, BMS communication and charging parameters must be checked before installation.
Bluetooth monitoring requires the optional VE.Bus Smart Dongle, while access through the VRM portal requires a compatible GX device. These accessories are not included unless explicitly stated.
The product has an IP21 protection rating and is intended for indoor installation. Configuration and commissioning must be carried out by qualified personnel.
