How to Choose a Multiplus with Confidence

Important Safety Notice

Please note that for your safety and to comply with NZ/AU Regulations, Multiplus Products must be installed by a qualified electrical installer.

This guide targets electricians new to solar systems who need to understand Victron's Multiplus product naming conventions.

Understanding Multiplus Notation

Two example models demonstrate the naming structure:

  • MultiPlus-II 48/10000/140-100/100 230V
  • MultiPlus-II 24/3000/70-32 230V GX

Component Breakdown

Model Name: MultiPlus-II

This represents a Victron Energy inverter/charger capable of converting DC battery power to AC appliance power, charging batteries from AC sources, and managing energy systems. The -II variant supports parallel and three-phase operation for seamless multi-unit integration.

Battery Voltage (First Number)

The opening digit indicates the nominal battery system voltage:

  • 48 = 48V battery system
  • 24 = 24V battery system

Selection depends on your battery type and system scope.

Inverter Power Output (Second Number)

This number specifies continuous output in volt-amperes (VA):

  • 10000 VA = approximately 8,000 watts at 0.8 power factor
  • 3000 VA = approximately 2,400 watts at 0.8 power factor

This determines the simultaneous electrical load capacity.

Charger Current (Third Number)

The third figure indicates maximum battery charging current in amps from AC sources:

  • 140 amps on 48V systems
  • 70 amps on 24V systems

This impacts recharge speed when connected to external power.

AC Input Current (Fourth Number)

Listed before voltage specification, this shows maximum AC input draw:

  • 100/100 amps = dual-input capability (grid plus generator)
  • 32 amps = single input option

This prevents overloading external power sources.

Nominal AC Voltage

The specification indicates output voltage (typically 230V for Europe and many regions, 120V for North America).

Special Features (GX Suffix)

The GX designation means the device includes built-in communication capabilities through an integrated GX Module, enabling remote monitoring and control via Victron's VRM portal and smart device integration.

Example Breakdowns

(a) MultiPlus-II 48/10000/140-100/100 230V

  • 48V battery system compatibility
  • 10,000 VA output (approximately 8,000W continuous)
  • 140-amp battery charging capability
  • 100 amps maximum draw from two AC sources
  • 230V AC output for appliances

(b) MultiPlus-II 24/3000/70-32 230V GX

  • 24V battery system compatibility
  • 3,000 VA output (approximately 2,400W continuous)
  • 70-amp battery charging capability
  • 32 amps maximum draw from single AC source
  • 230V AC output
  • Built-in GX communication module

Tips for Solar System Planning

  1. Match system requirements by selecting appropriate battery voltage based on system size, sufficient inverter power for appliances, and charger current matching battery capacity.

  2. Plan expansion by considering oversized capacity if future battery or appliance additions are anticipated.

  3. Consult professionals through technical@luxsolar.co.nz for expert guidance.

  4. Explore trade pricing by completing the Solar Trade Application Form for wholesale rates on Victron products.