The Victron MK3-USB interface connects a PC or laptop directly to the VE.Bus port on compatible Victron inverters and inverter/chargers. It allows configuration, monitoring and firmware updates using VEConfigure and VEFlash software on Windows. Installers use it when commissioning or servicing Victron MultiPlus, MultiGrid and Quattro systems.

Victron interface MK3 USB key features

• Function, converts VE.Bus communication to USB for direct PC connection to Victron inverters and inverter/chargers.
• Compatibility, works with Victron MultiPlus, MultiPlus-II, MultiGrid and Quattro product ranges.
• Software, supports configuration via VEConfigure and firmware updates via VEFlash on Windows.
• Weight, 0.08 kg, easily carried in an installer's toolkit.
• Connection, plug-and-play USB, no external power supply needed from the PC side.
• Identification, SKU ASS030140000, GTIN 8719076019435, genuine Victron Energy product.

Product overview

The MK3-USB is the standard tool for accessing the VE.Bus communication port on Victron MultiPlus, MultiPlus-II, MultiGrid and Quattro inverter/chargers. Without it, settings such as charge algorithms, input current limits, transfer switch behaviour and system configuration cannot be adjusted from a PC.

VEConfigure, the main configuration tool for VE.Bus devices, communicates only via MK3-USB. VEFlash, used for firmware updates, does the same. Both run on Windows. The interface draws its operating power from the connected Victron device, so the PC's USB port doesn't need to supply power.

It does not offer real-time monitoring or data logging. For live monitoring, a GX device or VE.Bus Smart Dongle is the right choice instead. This interface is purely a configuration and firmware tool.

Applications

• Commissioning and configuring Victron MultiPlus, MultiPlus-II, MultiGrid and Quattro inverter/chargers on site.
• Updating firmware on VE.Bus devices using VEFlash.
• Adjusting charge settings, input current limits and transfer switch parameters via VEConfigure.
• Diagnosing and reconfiguring existing installations during service visits.
• Setting up parallel and three-phase MultiPlus or Quattro systems needing PC-based configuration.

What's in the box

• 1 x Victron MK3-USB interface (VE.Bus to USB)

Installation notes

This is a configuration accessory and carries no mains or battery voltage. It connects between the RJ45 VE.Bus port on the Victron device and a USB port on a Windows PC. Configuration of inverter/charger settings, particularly on grid-connected or parallel systems, should be done by a qualified installer familiar with VEConfigure. Incorrect configuration on grid-tied systems may affect G98 or G99 compliance, so always check settings against network operator requirements after changes.