The Victron MultiPlus-II 12V 3000VA/120A represents the evolution of inverter-charger technology, combining all the proven capabilities of the original MultiPlus with advanced Energy Storage System functionality and external current sensing options that extend PowerControl and PowerAssist functions to professional grid-interactive applications. This sophisticated unit delivers 3000VA of pure sine wave inverter power alongside 120A of adaptive battery charging, making it the cornerstone of high-performance motorhome, marine, and off-grid installations where seamless integration with solar systems, grid-tie inverters, and energy management is essential. The built-in anti-islanding functionality and extensive country approvals enable grid-connected applications including feed-in capability, whilst the optional external current sensor unlocks advanced self-consumption optimisation and load management up to 100A capacity.
What distinguishes the MultiPlus-II from its predecessor is the dual-output architecture that provides intelligent load management - the main output delivers uninterrupted power with sub-20-millisecond transfer switching that keeps computers and sensitive equipment running during grid failures, whilst the auxiliary output operates only when AC input is available, perfect for high-consumption loads like water heaters that shouldn't drain batteries during inverter operation. The 32A transfer switch rating handles substantial loads whilst PowerAssist technology seamlessly supplements insufficient generator or shore power with battery power during peak demands, then redirects surplus capacity back to battery charging when loads reduce. Professional installation flexibility extends to parallel operation supporting up to six units for 18kW output, or three-phase configuration delivering industrial-scale power distribution with sophisticated load balancing.
The advanced charging system employs adaptive 4-stage algorithms that automatically adjust absorption time based on discharge patterns, preventing overcharging whilst ensuring complete charging cycles across all battery chemistries from traditional lead-acid through lithium technologies. At 19kg and requiring dual 50mm² DC cables with 400A fusing, this isn't a lightweight solution, but the robust construction and comprehensive protection systems justify the substantial installation requirements for applications demanding professional-grade performance. The main limitation remains the 32A transfer switch rating that restricts total AC throughput to 7.3kW even when connected to higher-capacity shore power, requiring careful load management or external switching for installations with heavy simultaneous AC demands, though the dual-output design and advanced monitoring capabilities through VRM and VictronConnect provide the control sophistication that separates professional installations from basic off-grid setups.
Victron MultiPlus-II Inverter/Charger (12V 230V / 3000VA / 120-32A) Features
PowerAssist
PowerControl
ESS: Energy Storage Systems
Uninterrupted AC power (UPS)
Remote Monitoring & Control
MultiPlus & MultiGrid Functions
ESS application approval
For use with off-grid and grid-connected alternative energy systems
Pure sine wave output (inverter)
Two AC outputs
Transfer Switch UPS function (inverter) on mains AC output
Adaptive 4-stage charging (charger)
Trickle charging output to maintain 2nd battery (charger)
Storage mode to prolong battery life (charger)
Battery temperature sensor (charger)
Voltage sensing to compensate for voltage drop (charger)
Remote On/Off switching
Programmable alarm/signalling relay
Parallel and 3-phase configurations possible
Protected against output short circuit
Protected against battery voltage low/high
Protected against power overload
Protected against over-temperature
Protected against 230V AC detected on inverter output (e.g. from another AC source)
Protected against input voltage ripple too high
5-year manufacturer's warranty
Specifications Inverter
Input voltage range: 9.5 - 17 VDC
Output voltage: 230VAC +/- 2%
Output frequency: 50Hz +/- 0.1% (can be adjusted to 60Hz)
Continuous output power at 25ºC: 3000VA
Continuous output power at 25ºC/40ºC/65ºC: 2400/2200/1700W
Maximum apparent feed-in power: 3000VA
Peak power: 5500W
Max. efficiency: 93%
Zero load power consumption: 13W
Zero load power consumption (AES mode): 9W
Zero load power consumption in search mode: 3W
Charger
Input voltage range: 187 - 265 VAC
Input frequency: 45-65Hz
Charge voltage (absorption): 14.4 VDC
Charge voltage (float): 13.8 VDC
Charge voltage (storage mode): 13.2 VDC
Max. battery charge current: 120A
Battery temperature sensor: Yes
Overall
Transfer switch current rating: 32A (@ 230 VAC)
Auxiliary output: Yes 32A
External AC current sensor: Yes (optional extra)
Programmable relay: Yes
Output short circuit protection: Yes
Overload protection: Yes
Battery over-voltage protection: Yes
Battery under-voltage protection: Yes
Over-temperature protection: Yes
230 VAC on inverter output protection: Yes
Input voltage ripple too high protection: Yes
Operating temperature: -40ºC to +65ºC (fan assisted cooling)
Battery connection: M8 bolts
230V AC cable connection: Screw terminals - 13mm² max.
Ingress Protection rating: IP22
Weight: 19kg
Overall dimensions: 546 (H) x 275 (W) x 147 (D) mm
If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.
For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
Did you know we have been established and have been in the caravan and motorhome industry for over 50 years?
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