MultiPlus-II 12/3000/120-32 230V
Victron MultiPlus-II 12/3000 230V wiring diagram
230 V AC inverter/charger with a 12 V house-bank connection: 3000 VA / 2400 W at 25°C, 120 A charger and 32 A transfer switch. Separate from the 120 V and 2x120 V models. DC currents are nominal-voltage planning estimates; parallel battery cables and AC installation require manual review.
- Compatible systems
- 12 V
- Rated power
- 2,400 W
- Estimated DC draw
- 215 A
Wiring diagram
How the MultiPlus-II 230V is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
230 V AC model, DC planning example only. The manual specifies a 400 A DC fuse and two 50 mm² cables per polarity for 0–5 m runs (two 70 mm² for 5–10 m), using 90°C copper outside closed conduit. Crimp calculates each drawn path as one conductor; its displayed wire does not verify or replace that parallel pair. The starter uses a 400 Ah placeholder bank and pins the manual's fuse rating. Verify actual battery limits, protection and parallel conductors separately. Manufacturer installation manual
Edit this wiring exampleCable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
10 ft one way
12 V DC · 230 V AC model
- Wire
- 4/0 AWG · 120 mm²
- Example fuse
- 400 A
- Design current
- 215 A
- Voltage drop
- 0.8%
Sized against ABYC E-11. The design current is a catalog planning estimate for inverter operation at nominal battery voltage, not a measured draw. Actual current changes with load, battery voltage and efficiency. Check the exact model's cable, fuse and installation requirements. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
230 V AC model, DC planning example only. The manual specifies a 400 A DC fuse and two 50 mm² cables per polarity for 0–5 m runs (two 70 mm² for 5–10 m), using 90°C copper outside closed conduit. Crimp calculates each drawn path as one conductor; its displayed wire does not verify or replace that parallel pair. The starter uses a 400 Ah placeholder bank and pins the manual's fuse rating. Verify actual battery limits, protection and parallel conductors separately. Manufacturer installation manual
Supporting parts
- 20 ft total of 4/0 AWG (120 mm²) marine cable
- Terminations for 4/0 AWG cable, matched to the equipment's screw terminals, leads or studs
- 400 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation, checked 2026-09-16. Manufacturer documentation →
Which MultiPlus-II 12/3000 230 V is this?
This page covers MultiPlus-II 12/3000/120-32, 230 V AC: a 12 V battery connection, 3000 VA / 2400 W inverter at 25°C, 120 A charger and 32 A transfer switch. Check the exact column in Victron's specifications.
The 120 in the model number is charging current. It does not identify AC voltage. The single 120 V model and 2x120 V model retain separate entries. Switching this page to AWG changes the presentation, not the hardware.
How is the MultiPlus-II 12/3000 230 V wired?
Installation section 4.3 specifies a 400 A DC fuse and two 50 mm² cables per polarity for 0–5 m, increasing to two 70 mm² per polarity for 5–10 m. It calls for 90°C copper outside closed conduit.
Crimp's single-path conductor result does not validate that parallel pair. The editable starter opens a 400 Ah placeholder bank with the fuse rating pinned and this limitation in its notes. Review the physical parallel conductors, actual bank, disconnect and fuse/holder before using the drawing for installation.
What should I bear in mind with the MultiPlus-II 12/3000 230 V?
The DC draw and peak are estimates from rated output power divided by nominal battery voltage and published maximum efficiency. Maximum efficiency is not a guaranteed operating curve; lower battery voltage changes current, and the peak duration is unspecified. The catalog's DC terminal ceiling is a calculation allowance, not a verified connector rating.
The same connected starter supplies the page calculation and editor. Battery capacity alone does not verify discharge, charging acceptance, BMS behavior or fault-current protection. The fuse checker helps collect the missing hardware evidence.
The example covers DC only. AC supply, protective earth, output protection and grounding behavior require separate design under the manufacturer's instructions. The abbreviated AC terminals are not a complete mains pinout.
What do owners and installers say about the MultiPlus-II 12/3000 230 V?
- A caravan owner's setup question describes conflicting readings from a SmartShunt, VE.Bus dongle and battery BMS after installation. The indexed account establishes the reported symptom, not its cause or a confirmed remedy. A wiring diagram does not verify monitoring settings or charger configuration.
What belongs around the MultiPlus-II 12/3000 230 V?
The SmartShunt and Lynx Distributor examples cover monitoring and branch distribution around the house bank. Select the actual battery protection and disconnect alongside the parallel-cable design.
Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
230 V AC inverter/charger with a 12 V house-bank connection: 3000 VA / 2400 W at 25°C, 120 A charger and 32 A transfer switch. Separate from the 120 V and 2x120 V models. DC currents are nominal-voltage planning estimates; parallel battery cables and AC installation require manual review.
- Compatible systems
- 12 V
- Rated power
- 2,400 W
- Estimated DC draw
- 215 A
- Rated output
- 120 A
- Estimated DC peak (duration unknown)
- 493 A
Terminal map
This is MultiPlus-II 12/3000/120-32, 230 V AC. DC + and DC − carry inverter discharge and charging. DC current values and terminal ceilings are planning estimates, not connector ratings. AC-in and AC-out-1 are abbreviated logical connections; protective earth, AC-out-2, grounding behavior and AC protection are not modeled. The editable example leaves AC disconnected.
AC IN L
neutral · input
AC IN N
neutral · input
DC +
positive · input
DC −
negative · input
AC OUT 1 L
neutral · output
AC OUT 1 N
neutral · output
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with MultiPlus-II 230V.
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