Answer
Nov 24, 2025 - 09:38 AM
The Victron MultiPlus-II 120V (single-phase model) and MultiPlus-II 2x120V (split-phase capable model) are both multifunctional inverter/chargers designed for off-grid, marine, RV, and backup power applications. They share core features like PowerControl (to limit input current), PowerAssist (to boost limited AC sources with battery power), adaptive battery charging, and compatibility with Victron's VE.Bus ecosystem for monitoring and expansion. Both are available in 12V or 24V DC variants, with typical ratings of 3kVA (3000VA continuous output at 25°C, ~2400W at 77°F).
The primary differences stem from their AC voltage handling: the single 120V model is optimized for straightforward 120V systems, while the 2x120V model supports North American 50A split-phase (120/240V) shore power or generator inputs, making it ideal for RVs, boats, or homes with dual-leg panels.
The 2 x 120 volt model can pass through 120/240 volts from shore or generator. When inverting it only produces two legs of 120 volts with no 240 volts.
- Voltage Flexibility: The 2x120V shines in split-phase environments (common in US RVs and homes), allowing seamless 50A (120/240V) passthrough without reconfiguration. For 30A (120V) inputs, it auto-combines outputs to supply 120V to both legs. The single 120V model lacks L2 terminals, so it's strictly single-phase.
- Inverter Limitations: Neither provides 240V output from batteries alone—240V loads (e.g., electric water heaters) only work during passthrough on the 2x120V model.
For detailed datasheets, refer to the PKYS INC website. Choose based on your input power: single 120V for simplicity, 2x120V for versatility in split-phase setups. If your system involves solar or batteries, integrate with a Cerbo GX for monitoring.
