It provides a direct communication connection between a compatible Victron VE.Bus product and a computer or supported Android device.

With the appropriate Victron software, it can be used to review operating information, change supported settings, diagnose system behaviour and install firmware updates.

Choose the version that matches the device you plan to use. USB-C is generally the best choice for newer computers and compatible Android devices, while USB-A is convenient for traditional laptops, desktops and service computers.

Both versions provide the same VE.Bus configuration, diagnostic and firmware-update capabilities.

ASS030140000 connects to a computer through a traditional USB-A port. ASS030140030 uses the newer USB-C connection found on many modern computers and compatible Android devices.

Both versions provide the same VE.Bus configuration, diagnostic and firmware-update capabilities. The only meaningful difference is the USB connector, so choose the version that best matches the device you plan to use.

VictronConnect is the primary software for connecting through the MK3-USB. It can be used on supported Windows, macOS and Android devices to view operating information, change compatible VE.Bus settings, save configurations and perform supported firmware updates.

VEConfigure is available for Windows as part of Victron's VE Configuration Tools. It is used for advanced VE.Bus configuration tasks, including certain Assistants and specialized system settings that may not be available through VictronConnect.

Both programs are available as free downloads from Victron Energy. The appropriate software depends on the connected equipment, its firmware and the settings that need to be changed.

No. A straight-through RJ45 UTP cable is required between the MK3-USB interface and the VE.Bus port on the Victron product.

The cable length can be selected to suit the installation and is sold separately.

A quality factory-manufactured straight-through RJ45 UTP patch cable can normally be used. Avoid crossover cables and poorly crimped cables, which may cause communication problems.

Although the connector resembles an Ethernet network connection, VE.Bus equipment should not be connected directly to a router, network switch or Ethernet port.

Yes, a suitable USB-A to USB-C or USB-C to USB-A adapter may be used when necessary. The adapter must support data communication rather than charging only.

For Android devices, the phone or tablet must also support USB host or OTG operation.

Yes, when the Android device supports USB host or OTG operation and can run VictronConnect.

The USB-C version is normally the most convenient choice for modern Android devices. The USB-A version may require a suitable OTG adapter.

No. MK3 configuration through VictronConnect is not supported on Apple iPhone or iPad devices.

Use a compatible Windows or macOS computer, or a supported Android device, for a wired MK3 connection.

No. The MK3-USB is specifically designed for Victron products equipped with a VE.Bus communication port.

SmartSolar and BlueSolar charge controllers, SmartShunts and other products that use VE.Direct require a compatible VE.Direct interface instead.

The two accessories serve different purposes. A VE.Bus Smart Dongle is intended primarily for convenient Bluetooth monitoring, mode control and AC input-current adjustment.

The MK3-USB provides wired access to supported VE.Bus settings and firmware updates, making it the more capable tool for commissioning, configuration and service work.

A Cerbo GX provides permanent system monitoring, control and VRM connectivity. Many settings can also be managed remotely through supported Victron tools.

The MK3-USB remains useful as a direct local service connection for commissioning, diagnostics, supported firmware work and situations where remote access is unavailable.

It can remain connected during configuration, diagnostics or servicing, but it is primarily a commissioning and service tool rather than a permanent monitoring solution.

For ongoing system monitoring and remote access, a Cerbo GX or another compatible GX device is generally the better choice.

Yes. Contact us with the exact Victron model, battery specifications, BMS information, available AC source and intended loads.

We can help identify the settings and additional equipment that should be considered for your system.

Yes. We may be able to special-order Victron products that are not currently listed on our website, including alternate interfaces, communication cables, monitoring equipment and system accessories.

Contact us with the Victron model or part number you need and we will confirm availability, pricing and estimated lead time.

The Victron MK3-USB Interface is backed by Victron Energy's 5-year limited warranty.

If you need troubleshooting or warranty assistance, Sapphire Energy will work with you throughout the process.