Victron MultiPlus-II 12/4k/160-50 120V 50/60Hz Inverter | PMP122405110
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3,400W at 25°C · 160A charger · 50A transfer switch · 50/60Hz
Victron MultiPlus-II 12/4k/160-50 120V 50/60Hz Inverter | PMP122405110
The 50/60Hz version of the 12V 120V MultiPlus-II 4k: 3,400W of continuous pure sine wave output at 25°C, 160A battery charging, a 50A AC transfer switch, PowerAssist, and scalable VE.Bus networking.
The Victron MultiPlus-II 12/4k/160-50 120V 50/60Hz, part PMP122405110, is the dual-frequency version of Victron’s 4k 12V MultiPlus-II for 120V systems. It combines a pure sine wave inverter rated at 3,400W continuous at 25°C, a 160A adaptive charger, and a 50A transfer switch in one programmable 12V power hub for RV and marine systems, and for off-grid or backup systems where local code accepts it. Its output defaults to 60Hz and can be set to 50Hz.
12V
Battery system
3,400W
Continuous at 25°C
6,000W
Peak, 2 seconds
160A
Battery charger
50A
Transfer switch
50/60Hz
Configurable output
Built for professional 12V power systems
Genuine VictronPart PMP122405110
GX / VRM readyLocal and remote monitoring
PowerAssistSupplements limited AC input
Dual AC outputsCritical and source-only loads
VE.Bus scalableParallel and split-phase capable
5-year limited warrantyFrom Victron Energy; terms apply
The Heavy-Duty Power Hub: Decoding 12/4k/160-50
Inverter, high-output charger, and transfer switch in one integrated platform.
The model name tells you what you are getting: a native 12V battery platform, the 4k inverter stage rated at 3,400W continuous at 25°C, up to 160A of DC charging, and a 50A AC transfer switch. The combination suits 12V systems that need substantial AC output and fast recharging from shore power or a generator.
3,400W Pure Sine Wave Inverter
The inverter delivers 3,400W continuous at 25°C, 3,100W at 40°C, 2,400W at 65°C, and 6,000W peak power for up to 2 seconds. Its clean 120V sine wave output supports sensitive electronics and household-style loads when the battery bank, wiring, protection, and ventilation are correctly engineered.
The 50A Transfer Switch
A 50A transfer stage passes a 120V shore, generator, or grid source through to the connected loads while the charger replenishes the battery. The installation still needs correctly sized upstream and downstream breakers, conductors, grounding, and code-compliant distribution.
160A Smart Battery Charger
When external AC is available, the MultiPlus-II becomes a 160A 12V battery charger. Charge voltages, current limits, and algorithms are configurable, so the unit can be commissioned for the exact Epoch battery, managed BMS, and system design.
The 50/60Hz Version of the 12/4k/160-50 120V
What the 50/60Hz designation changes, and what to confirm before installation.
PMP122405110 is the 50/60Hz version of the MultiPlus-II 12/4k/160-50 120V; Victron’s dimension drawing pairs it with the 60Hz-only PMP122405100 in the same enclosure. Its inverter output defaults to 60Hz and can be configured for 50Hz, and its AC input accepts 45–65Hz rather than the 55–65Hz of the 60Hz-only version, within the same 90–140VAC input range.
Victron’s 120V technical specifications list UL 458 and CSA C22.2 No. 107.1-16 for the 12/4k/160-50, but Victron’s published UL 458 certificate does not yet name PMP122405110; if your installation, insurer, or inspector requires a specific listing, confirm it on the unit label or with Victron before purchase. It is not a UL 1741 model, and Victron’s manual notes that the grid-parallel function is neither UL 1741 nor CSA C22.2 No. 107.1 certified, so it is not a grid-interactive device. UL 458 covers vehicle and marine inverters, and many inspectors require UL 1741 for permanently wired home or building installations; confirm your authority having jurisdiction’s requirements.
Advanced Victron Energy Management
PowerAssist, intelligent load separation, and fast backup transfer.
On shore or generator power, PowerControl first reduces battery charging to keep the source within its configured current limit. If the connected loads still need more power, PowerAssist supplements the AC source with energy from the battery, then uses spare source capacity to recharge when demand falls.
AC-Out-1 backs up critical loads and transfers to inverter power in less than 20ms. AC-Out-2, rated 32A, is reserved for loads that should run only while shore, generator, or grid power is present, helping keep water heaters and other non-critical loads from draining the battery bank.
Scalable: Parallel, Split Phase, and Three Phase
Grow the power platform as system requirements expand.
Two matching units can be configured through VE.Bus for 120/240V split-phase output; to pass 240V loads through from shore or generator power, each unit’s AC input must be on one leg of a 120/240V split-phase source, so check Victron’s split-phase documentation before relying on a 120V-only supply. Up to six identical units can operate in parallel on one battery bank, and three matching units can form a three-phase system (not for delta connection).
Multi-unit systems need matching models, compatible firmware, equal DC cable lengths and cross-sections, correct VE.Bus configuration, and engineered protection. For split-phase input and L1/L2 outputs from one unit, see the 2x120V model, PMP122405210.
Compatible applications
High-output 12V mobile, marine, off-grid, and backup systems.
- ✓Large 12V RV, van, and overland systems; with one 120V input, it uses a single leg of 50A 120/240V shore service.
- ✓Marine and yacht systems with a protected, dry inverter compartment.
- ✓Installations that need a configurable 50Hz or 60Hz 120V output.
- ✓Off-grid cabins, workshops, and tiny homes on a 12V bank, where the inspector accepts this model’s listing.
- ✓Home and small-business backup where local code permits a non-UL 1741 inverter/charger.
- ✓Generator-backed installations that need PowerControl and PowerAssist.
- ✓120/240V split-phase systems from two matching units, with a split-phase source for 240V pass-through.
- ✓GX-connected systems using Cerbo GX, Ekrano GX, and the VRM portal.
Inverter/charger features
High-output conversion, intelligent transfer, and connected-system control.
Pure sine wave inverterClean 120V AC power for sensitive electronics and household-style loads.
3,400W continuous at 25°C3,100W at 40°C and 2,400W at 65°C, subject to installation and cooling conditions.
Time-limited 4,500W output4,500W for up to 30 minutes and 4,000W for up to one hour from a cold start.
6,000W peak power (2 seconds)Handles short-duration startup and surge demands within the inverter’s documented limits.
50A transfer switchPasses AC input from a properly protected grid, shore, or generator source.
160A adaptive chargerRecharges a compatible 12V battery bank from AC input using configurable charge settings.
PowerControl and PowerAssistHelps keep a limited shore or generator source within its configured current limit, adding battery power within the inverter’s ratings.
Two AC outputsSeparates inverter-backed critical loads from loads that should run only on external AC.
Fast no-break transferAC-Out-1 switches to inverter power in under 20ms if the AC source is lost (Victron’s UPS function); equipment that tolerates no interruption may need a dedicated UPS.
Configurable 50/60Hz outputOutput defaults to 60Hz and can be set to 50Hz; the AC input accepts 45–65Hz.
Search and AES modesRated idle draw is 18W, 11W in AES mode, or 4W in Search mode; Search mode switches the output off at very low load, so very small loads may go undetected.
VE.Bus networkingSupports configuration, monitoring, parallel operation, split phase, three phase, and system integration.
Recommended Victron accessories
Configuration, communication, monitoring, and sensing components, sold separately.
✓Victron MK3-USB-C (or MK3-USB) interface for commissioning, configuration, and firmware updates.
✓Genuine Victron RJ45 UTP cable for VE.Bus connections.
✓Cerbo GX or Ekrano GX for system integration and VRM remote monitoring.
✓VE.Bus Smart Dongle for local Bluetooth monitoring and selected controls.
✓Optional 100A external AC current sensor for PowerControl and PowerAssist.
✓Victron battery temperature sensor for temperature-compensated charging, if one is not supplied with your unit (check the packing list).
Technical specifications
Part-specific performance, connectivity, mechanical details, and installation values.
Commission for the exact battery and power system
Factory settings are not a substitute for system-specific engineering.
Program the battery charge profile, current limits, AC input limit, output frequency, ground-relay behavior, BMS interfaces, and operating mode for the exact installation. Use an MK3-USB-C or MK3-USB interface or a supported GX or remote workflow, follow the battery manufacturer’s settings, and verify the completed system before energizing loads.
Frequently asked questions
Victron MultiPlus-II 12/4k/160-50 (120V 50/60Hz) FAQs
Common questions about the 50/60Hz variant, 120V and 240V output, the 160A charger, wiring, and monitoring.
What do the numbers 12/4k/160-50 mean?
12 means the unit is designed for a nominal 12V battery system; 4k identifies the inverter power class, which Victron rates at 3,400W continuous at 25°C and 6,000W peak for 2 seconds; 160 is the maximum DC battery charge current in amps; and 50 is the AC transfer-switch and maximum AC input rating in amps.
What does the 50/60Hz designation mean?
PMP122405110 is Victron’s 50/60Hz MultiPlus-II 12/4k/160-50 120V. Its inverter output defaults to 60Hz and can be configured for 50Hz, and its AC input accepts 45–65Hz. The output stays at 120V and the AC input range remains 90–140VAC, so it is not designed for 230V sources. Confirm that connected loads are rated for the selected frequency.
How is PMP122405110 different from PMP122405100?
Victron’s dimension drawing shows both part numbers in the same enclosure. PMP122405100 is the 60Hz-only version, with a 55–65Hz AC input range. PMP122405110 is the 50/60Hz version: its output can be configured for 50Hz and its AC input accepts 45–65Hz. Confirm PMP122405100’s other ratings on its own Victron datasheet. Choose PMP122405110 when the system may need 50Hz operation.
What does the 50A transfer switch mean for shore and generator power?
The 50A transfer switch lets the unit draw up to 50A from one 120V shore, generator, or grid source to supply its AC outputs and charge the battery. With one 120V AC input, it uses only one leg of a 50A 120/240V RV or marina pedestal; to use both legs, choose the 2x120V model (PMP122405210) or a two-unit split-phase system. On shore or generator power, PowerControl holds the draw within a configured input limit and PowerAssist adds battery power above it. Victron’s manual notes this model’s grid-parallel operation is not UL 1741 or CSA C22.2 No. 107.1 certified, so confirm with your authority having jurisdiction before using PowerAssist on a utility grid connection. Proper breakers, conductors, grounding, and local-code compliance are still required.
Does one MultiPlus-II provide 120V or 240V output?
One PMP122405110 provides a single 120V AC output. Two identical units configured through VE.Bus can create a 120/240V split-phase system; to pass 240V loads through from shore or generator power, the AC input must be a 120/240V split-phase source with one leg per unit, so check Victron’s split-phase documentation before relying on a 120V-only supply. Multi-unit systems need matching models and firmware and a qualified installer.
What DC fuse and battery cable size does Victron recommend?
Victron gives the DC fuse and battery cable sizes for the 12/4k/160-50 in the installation table of its current MultiPlus-II 120V manual; size to that table, then confirm against local code, ambient temperature, cable construction, routing, and run length. At 12V, a 3,400W load draws roughly 300A or more from the battery, so short, heavy cables, a correctly rated DC fuse, and a battery bank rated for that discharge current are essential.
What is the difference between AC-Out-1 and AC-Out-2?
AC-Out-1 is the inverter-backed no-break output: if the AC source fails, the inverter takes over in less than 20ms. AC-Out-2, rated 32A, is for loads that should run only while shore, generator, or grid power is present; it disconnects on battery operation and reconnects after the AC source is back.
Can the 160A charger be configured for Epoch LiFePO4 batteries?
Yes. The charge profile must be configured for the exact battery or managed-BMS system rather than left on an unsuitable factory profile, with charge current no higher than the bank’s rated maximum. Use VictronConnect or VEConfigure through a supported interface, and follow Epoch’s current charge-voltage, current-limit, temperature, and BMS-communication guidance.
Can I monitor and control this inverter from my phone?
Yes, with additional Victron hardware. A Cerbo GX or Ekrano GX enables system integration and VRM remote monitoring, and a VE.Bus Smart Dongle adds local Bluetooth monitoring and selected controls. An MK3-USB-C or MK3-USB interface and an RJ45 UTP cable are used for computer-based configuration and firmware updates.
Can this inverter be installed outdoors or in a wet compartment?
No. The enclosure is rated IP21 and the unit must be installed in a dry, ventilated location. Do not install it in wet, dusty, explosive, or poorly ventilated spaces, and keep the clearance Victron’s manual requires around the enclosure.
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Safety certifications & listings
Every mark below is a standard this battery has been tested against or a listing it carries. Here is what each one covers, in plain English.
IP21
Ingress protection
Objects larger than 12.5 mm, such as fingers, and protected against vertically dripping water. Under IEC 60529 the first digit rates solids and the second rates water.
- Finger-safe enclosure
- Drips and condensation
- Indoor installation
IEC 60529, Degrees of protection provided by enclosures