Inverter Charger | Victron | MultiPlus Compact 12/1600/70-16 230V VE.Bus

The Victron MultiPlus Compact 12/1600/70-16 is a combined 1600VA true sine wave inverter, 70A multi-stage battery charger, and 16A automatic transfer switch — all in one aluminium enclosure that fits where a standard MultiPlus won't. It's sized for real-world constraints: under-dinette battery bays in caravans, engine rooms on trailer boats, tight battery compartments in campervans and 4WDs. If you're building a 12V system in Australia and need reliable shore power management, battery charging, and AC inversion in a compact form factor, this is the unit.

---

Key Features

• True sine wave output — 1600VA / 1300W continuous at 25°C: Drives sensitive electronics, motor loads, CPAP machines, and variable-speed appliances without issue. Not modified sine wave.
• 70A adaptive 4-stage battery charger: Bulk, Absorption, Float, and Storage mode with automatic absorption time adjustment after deep discharge. Includes battery temperature compensation via a supplied external sensor.
• PowerAssist — supplements limited shore power in real time: When AC load briefly exceeds the shore supply limit, the MultiPlus draws the shortfall from the battery bank. The battery recharges when the peak passes.
• PowerControl — protects your shore or generator supply: Monitors total AC load and automatically reduces charging current to keep total draw within the source limit. Essential for marina berths and campsite power pedestals.
• Sub-20ms transfer switch — UPS-grade response: Switches from shore/generator to inverter in under 20 milliseconds. Standard computers and electronics continue running without disruption.
• Programmable relay (230V / 4A AC): Configurable as an alarm output, DC undervoltage signal, or generator start/stop trigger — useful in off-grid cabin and marine applications where automated control is needed.
• Compact enclosure — 375 x 214 x 110mm, 10kg: Roughly 20% smaller frontal footprint than the standard MultiPlus 12/1600/70-16. Same electrical ratings, significantly smaller box. Pre-fitted 1.5m battery cables simplify installation.
• VE.Bus architecture — full Victron ecosystem integration: Connects to Cerbo GX, Ekrano GX, VE.Bus Smart Dongle, and Multi Control Panel. Supports parallel operation of up to 6 units and three-phase configuration.
• Multi-chemistry battery support: Compatible with flooded lead-acid, AGM, Gel, LiFePO4, and other lithium chemistries. LiFePO4 requires configuration via VEConfigure software and MK3-USB adapter (see Installation Notes).
• Energy-saving modes: AES/ECO mode drops idle draw to 5W. Search mode reduces it further to 2W — relevant for solar or limited-capacity systems where parasitic load matters.
• Built-in protection suite: Output short circuit, overload, high/low DC voltage, over-temperature thermal throttling and shutdown, and protection against back-feed when AC input is live.

---

Specifications

Inverter

Parameter	Value
Nominal DC input voltage	12V
DC input voltage range	9.5 – 17V
AC output voltage	230 VAC ±2%
AC output frequency	50 Hz ±0.1% (factory default; adjustable)
Continuous output at 25°C	1600 VA / 1300 W
Continuous output at 40°C	1200 W
Continuous output at 65°C	800 W
Peak power	3000 W
Maximum efficiency	93%
Zero load draw — normal	8 W
Zero load draw — AES/ECO mode	5 W
Zero load draw — Search mode	2 W
Waveform	True sine wave

Battery Charger

Parameter	Value
AC input voltage range	187 – 265 VAC
AC input frequency range	45 – 65 Hz
House battery charge current (max)	70A (at ≤25°C ambient)
Starter battery charge current	4A
Absorption voltage (default)	14.4V DC
Float voltage (default)	13.8V DC
Storage voltage (default)	13.2V DC
Charging algorithm	Adaptive 4-stage: Bulk, Absorption, Float, Storage
Temperature compensation	Yes — external sensor supplied

Victron recommends a house battery bank of 350–700 Ah for this unit — confirm with your installer for your specific setup.

Transfer Switch

Parameter	Value
Transfer switch rating	16A AC
Transfer time (AC loss to inverter)	<20 milliseconds

Physical

Parameter	Value
Dimensions (H x W x D)	375 x 214 x 110 mm
Weight	10 kg
Enclosure material	Aluminium, RAL 5012 blue
Installation environment	Protected indoor location — not weatherproof
Cooling	Fan-assisted forced air
DC connection	1.5m pre-fitted battery cables
AC connection	G-ST18i spring clamp terminals
Wall mount hole spacing	100mm (vertical centres)
Warranty	5 years (extendable to 10 years)

---

PowerAssist and PowerControl — How They Work

These two features are what separate the MultiPlus from a basic inverter-charger, and they matter most on a boat in a marina or a van at a powered campsite.

PowerControl sets a ceiling on how much current the MultiPlus will draw from your AC input source. Say you're plugged into a 16A shore power pedestal. If someone on board is running the microwave at 8A, PowerControl automatically caps the charger so the combined draw stays within the 16A limit. The shore power circuit stays protected. You set the current limit via the Multi Control Panel's rotary knob or through VEConfigure — and it adjusts live as loads change.

PowerAssist takes this further. It doesn't just limit — it actively supplements. Here's the real-world version: you're at a Queensland caravan park on a 10A site connection. You put the kettle on (1200W, roughly 5A) and then plug in a power tool (1000W). That's around 10A of combined load, already at your site limit — but the kettle and tool started simultaneously and the site breaker is marginal. The MultiPlus detects the shortfall and instantly pulls the extra current from your battery bank, keeping both loads running and the site breaker intact. Once the peak passes, the charger recovers the battery. The whole cycle is transparent to you.

For marine use, this is particularly useful when a marina berth has a single 10A or 15A supply and you want to run the air conditioner, charge devices, and still have the battery topped up overnight.

---

Installation Notes

• DC cabling and fusing: The pre-fitted 1.5m battery cables are rated for the unit's output, but your DC fuse or circuit breaker must be installed within 250mm of the battery terminals. Victron recommends a 250A fuse. Under full inverter load plus active charging, DC current draw can exceed 150A continuously — undersized cable is a fire risk and will trigger the unit's low-voltage protection.
• VE.Bus connection: Communication with the rest of your Victron system (Cerbo GX, Multi Control Panel, VE.Bus Smart Dongle) uses the RJ45 VE.Bus port. This is not VE.Direct — if you're familiar with SmartSolar MPPTs, note the difference. The MultiPlus Compact has no VE.Direct port.
• LiFePO4 battery setup — additional step required: The unit leaves the factory configured for AGM batteries. If you're running LiFePO4 (lithium iron phosphate), the charge voltages must be reprogrammed before use — typically Absorption 14.2V, Float 13.5V. This requires a laptop, the MK3-USB adapter (sold separately), and either VEConfigure (Windows) or VictronConnect software. Do not connect a LiFePO4 bank and assume factory defaults are safe — they are not.
• Storage mode: If the battery is not discharged for 24 hours, the charger drops to a 13.2V storage float to minimise battery stress. It then pulses back to absorption voltage once per week to keep the bank in good condition. This makes the unit well suited to boats and vans left unattended for extended periods.
• Thermal clearance and ventilation: Output power derate is significant in high ambient temperatures. At 40°C ambient — a realistic figure inside a caravan battery bay in an Australian summer — continuous output drops from 1300W to 1200W. At 65°C it falls to 800W. The unit is fan-cooled, not passively ventilated. Install it in a location with adequate airflow, not sealed inside a closed cabinet. Plan your enclosure with derating in mind if you're in a warm climate.
• Two AC outputs — load allocation matters: AC-OUT 1 is the no-break output — it stays live from the inverter when shore power is lost. AC-OUT 2 drops when shore power is absent. Fridges, critical lighting, and communications gear go on AC-OUT 1. Water heaters, EV chargers, and non-essential loads go on AC-OUT 2 so they don't drain your battery bank during a power interruption.
• Qualified installer: Installation of this unit in a fixed marine or caravan application involves mains AC wiring and high-current DC connections. In Australia, any work on the 230V AC side must be carried out by a licensed electrician. We recommend using a licensed auto/marine electrician experienced with Victron systems for the full installation.

---

Compatible Victron Accessories

• MK3-USB Interface (ASS030140000): Required for firmware updates and software configuration via VEConfigure or VictronConnect. Mandatory for LiFePO4 setup. Connects between the unit's VE.Bus port and a laptop USB port.
• VE.Bus Smart Dongle (ASS030539000): Adds Bluetooth monitoring and VictronConnect app access directly to the MultiPlus. Also measures battery voltage and temperature. No GX device needed for basic monitoring.
• Cerbo GX (BPP900450100): Full system integration hub — connects MultiPlus, MPPT solar chargers, battery monitors, and tank sensors into a single dashboard. Enables free VRM portal access (iOS, Android, and web browser) for remote monitoring and configuration from anywhere with internet.
• Multi Control Panel (REC040010210R): Physical wall-mounted panel with On/Off/Charger-Only switch, LED status readout, and rotary knob for setting the PowerControl AC input current limit.

---

Built for Australian Conditions

Whether you're fitting out a trailer boat for the Queensland coast, building a 12V system in a Toyota LandCruiser troopy, or setting up a reliable off-grid power system in a shed or cabin in regional Australia — the MultiPlus Compact 12/1600/70-16 is engineered to handle real operating conditions, not lab conditions. The thermal derating curve means you need to plan your installation with Australian summer temperatures in mind. The PowerAssist and PowerControl features mean you can work with whatever shore supply is available, not around it. And with a 5-year Victron warranty backed by authorised service centres across Australia through Victron's distributor network — including Springers Solar in Queensland — you have proper after-sales support if you need it. This is a professional-grade unit at a price point that makes sense for serious van builds, working boats, and off-grid installations that need to be reliable for years, not months.