Answer
Nov 12, 2025 - 10:52 AM
The Victron MultiPlus and MultiPlus-II are both highly capable inverter/chargers, but the MultiPlus-II is the updated version designed for enhanced grid-interactive capabilities and efficiency. Not all the grid-interactive capabilities are valid in the US because Victron units there cannot be used in an Energy Storage System (ESS) with grid-tie.
| Feature | Victron MultiPlus | Victron MultiPlus-II |
| Grid Compliance / Anti-Islanding | Lacks built-in anti-islanding. Better suited for pure off-grid, mobile (RV/marine), or basic backup systems where strict grid codes are not required. | Built-in anti-islanding functionality and a double-relay. This makes it grid code compliant for many countries' residential Energy Storage Systems (ESS) and grid-tied solar applications. (NOT APPLICABLE IN THE US) |
| External Current Sensor | Does not support an external current sensor. | Supports an optional external AC current sensor (CT clamp). This allows it to monitor the whole-house load to implement PowerControl, PowerAssist, and prevent grid feed-in more effectively. |
| System Application Focus | Mobile (RV, van, boat), basic off-grid, and simple backup systems. Often found in smaller VA ratings. | Grid-connected hybrid systems, larger residential solar/battery backup, and more advanced off-grid setups. |
| Idle Power Consumption | Higher idle (zero load) power draw. (e.g., 48V/3000VA model might draw around 25W). | Lower idle power draw, making it more efficient when loads are minimal. (e.g., the same model can draw as low as 11W). |
| North American Split-Phase | Can achieve 120/240V split-phase by paralleling two standard units. | Can achieve 120/240V split-phase by paralleling two standard units. Another option is a dedicated MultiPlus-II 2x120V model (in 3000VA and up) that provides 120V/240V split-phase with a single unit, which is ideal for 50A RV and residential applications. (Does not produce 240 volts when inverting) |
| Physical Design | Generally considered the older, often bulkier design. Form factor is "short and squat". Opening the cover exposes all of the insides. | Has a more modern, slightly flatter physical form factor, although some models may be taller. Has a form factor that is "tall and slim". Opening the cover just exposes the connection area. |
