Victron inverter-chargers combine three jobs in one box: a pure sine wave inverter, a battery charger and an automatic transfer switch. Plug in shore power or a generator and they pass it through while charging your battery. Unplug, and they switch to battery power fast enough that laptops keep running.
Victron Inverter-Chargers at a Glance
| Family | Output | Key specs (from datasheets) | Best for |
|---|---|---|---|
| MultiPlus-II 120V | 120V | 2,400W (12/3000) to 4,000W (5000VA) continuous at 25°C; up to 160A charging; under 20ms transfer | Vans, 30A RVs, boats, small cabins |
| MultiPlus-II 2x120V | 120V inverting, 120/240V pass-through | 50A per leg pass-through; 2,400W or 3,400W continuous | 50A RVs |
| Quattro | 120V or 230V | Two AC inputs (shore and generator) | Boats and RVs with a generator, larger homes |
| Multi RS Solar | 230V (240V/60Hz adjustable) | 48V, 6kW of PV on two 450V trackers | Off-grid 230V/240V builds |
| EasySolar-II GX | 230V | MultiPlus-II + MPPT 250/70 or 250/100 + GX in one box | Compact off-grid sheds and cabins |
Sources: Victron MultiPlus-II 120V, MultiPlus-II 2x120V, Quattro, Multi RS Solar and EasySolar-II GX datasheets.
Features Every Victron Inverter-Charger Shares
- PowerControl and PowerAssist. Set a maximum shore or generator current. The unit charges only with what’s left over, and with PowerAssist it adds battery power when loads exceed the limit.
- Second AC output on the MultiPlus-II, live only when shore power is present, for loads like a water heater that shouldn’t drain the battery.
- Parallel, split-phase and three-phase. Up to 6 MultiPlus-II units in parallel; two identical units make 120/240V split phase.
- GX and VRM. Pair with a Cerbo GX or Ekrano GX for remote monitoring on Victron’s free VRM portal.
Inverter-Charger or Plain Inverter?
If you never plug into shore power or a generator, a Phoenix inverter is simpler and often draws less at idle. The Phoenix VE.Direct 12/1200 (120V) lists 11W zero-load and 1–3W in ECO mode. If you do plug in, the MultiPlus-II replaces a separate charger and transfer switch.
Idle Draw Matters Off-Grid
The MultiPlus-II 12/3000/120-50 lists 13W at zero load, 9W in AES mode and 3W in search mode. 13W around the clock is about 312Wh a day (estimate).
How to Choose
- Battery voltage: 12V for vans and small RVs, 24V or 48V when continuous loads pass about 2,000W.
- Shore power type: 30A or single 120V suits the MultiPlus-II 120V; 50A split-phase suits the 2x120V.
- Sources: shore plus generator needs two inputs (Quattro) or a manual changeover.
- Market: Multi RS Solar, EasySolar-II GX and the Inverter Smart are 230V products. Check before buying in North America.
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Full specifications for the MultiPlus-II are on Victron’s product page.
Matching a Model to Your Build
| Build | Example pick | Why |
|---|---|---|
| Weekend van, 12V | MultiPlus-II 12/3000/120 | 2,400W continuous, 120A charger, one shore input |
| 30A travel trailer | MultiPlus-II 12/3000/120 | Single-leg shore power with PowerAssist |
| 50A fifth wheel | MultiPlus-II 2x120V | Passes 120/240V shore power through |
| Boat with generator and shore | Quattro | Two AC inputs, switches automatically |
| Off-grid cabin, 48V | MultiPlus-II 48/5000 | 4,000W continuous, higher efficiency at 48V |
| Home backup with 240V loads | Two MultiPlus-II 120V in split phase | Inverts 120/240V |
MultiPlus-II vs Quattro in Practice
Both share the same inverter and charger technology. The Quattro’s second AC input means shore power and a generator can both stay connected, and the Quattro picks whichever is live. With a MultiPlus-II, a second source needs an external transfer switch, such as a VE Transfer Switch or a manual selector. If your boat or RV has only one AC source, the MultiPlus-II covers it.
Charger Power Compared
| Model (120V) | Max charge current |
|---|---|
| MultiPlus-II 12/3000/120 | 120A |
| MultiPlus-II 24/3000/70 | 70A |
| MultiPlus-II 48/3000/35 | 35A |
| MultiPlus-II 48/5000/70 | 70A |
From Victron’s MultiPlus-II 120V datasheet. At 48V, 35A is about the same charging power as 140A at 12V.
Setting Up an Inverter-Charger
- Choose the battery voltage and model.
- Size the DC fuse and cables from the manual’s table.
- Set the battery type, charge voltages and AC input current limit in VEConfigure, VictronConnect (with the VE.Bus Smart dongle) or a GX device.
- Connect a Cerbo GX for monitoring, DVCC and VRM.
- Test shore power, inverter mode and the transfer between them.
Adding Solar
Every Victron inverter-charger works with SmartSolar MPPT charge controllers on the DC side. The MPPT charges the battery, and the inverter-charger supplies AC loads from it. A Cerbo GX coordinates both so the solar is used first and shore power fills in.
Expanding Later
MultiPlus-II units can be paralleled (up to six per phase) for more power, or configured for split phase. Starting with one unit and adding a second later is a common way to grow a system, as long as the second unit is the same model.
Monitoring Options
VictronConnect with the VE.Bus Smart dongle shows battery voltage, AC input and load on a phone. A Cerbo GX adds a full system view and VRM remote monitoring, and the Digital Multi Control panel adds a physical on/off switch and current-limit knob.
FAQ
Which Victron inverter-charger is best for a 50A RV?
The MultiPlus-II 2x120V. It passes 50A per leg but inverts 120V only.
Can I program a MultiPlus-II from my phone?
Bluetooth needs the optional VE.Bus Smart dongle. Full settings use VEConfigure with an MK3-USB interface, or remote access through a GX device.
Does a Quattro replace a MultiPlus-II?
It adds a second AC input. If you only have one AC source, the MultiPlus-II is enough.
Can a MultiPlus-II charge from solar directly?
No. It charges from AC. Solar connects through a SmartSolar MPPT on the DC side, and a Cerbo GX coordinates the two.
Can I use a MultiPlus-II without a battery monitor?
It works, but a SmartShunt or BMV gives you accurate state of charge, which the inverter can’t measure on its own.
Sources: Victron MultiPlus-II 120V, MultiPlus-II 2x120V, Quattro, Multi RS Solar, EasySolar-II GX and Phoenix VE.Direct 120V datasheets (victronenergy.com, accessed Oct 2026); EXPLORIST life, “Every Victron Inverter/Charger COMPARED!”.
Related: Allwei 1500W Pure Sine Wave Inverter Review, EcoFlow Delta 3 Max RV Boondocking, EcoFlow Delta 3 Max for Home Backup, plus the Victron Energy Guide