Victron VE.Bus to VE.Can Interface: Setup and Function

Key Takeaways

• The Victron VE.Bus to VE.Can interface is a deprecated product.
• It was originally used to integrate VE.Bus inverters with VE.Can MPPT solar chargers in Hub-1 systems.
• Modern Victron systems, specifically those using CCGX firmware version 1.73 or later, no longer require this interface.
• Proper VE.Can network termination was essential for the interface's correct operation.

What is the Victron VE.Bus to VE.Can Interface and why was it used?

The Victron VE.Bus to VE.Can interface was a device designed to bridge communication between a VE.Bus system (such as a MultiPlus or Quattro inverter/charger) and one or more VE.Can compatible MPPT solar chargers. Its primary application was within Hub-1 systems to enable grid-feedback functionality. This product is now deprecated, as Victron's Color Control GX (CCGX) firmware version 1.73 and newer versions have integrated this functionality, making the separate interface unnecessary.

Understanding the Interface's Operation

The VE.Bus to VE.Can interface allowed VE.Bus devices to communicate with VE.Can solar chargers, enabling coordinated operation within a Victron energy system. While the device itself is no longer required for new installations, understanding its original setup helps clarify its role in older Hub-1 systems.

Connecting the VE.Bus to VE.Can Interface

Installation involved connecting the interface directly between the VE.Bus device and the VE.Can solar charger(s). It acted as a translator, allowing these two different communication protocols to exchange data.

Powering the VE.Can Network

The VE.Can network, including the interface, did not require a separate power supply. It was powered directly by the connected VE.Can solar charger(s).

VE.Can Network Termination

For reliable communication on the VE.Can network, proper termination was crucial. This meant ensuring that the network was terminated on both ends using the VE.Can terminators typically supplied with devices like the Color Control GX and MPPT charger controllers. When connecting a Color Control GX, it was important to connect its VE.Can port to the VE.Can network, rather than connecting the VE.Bus device directly to the CCGX's VE.Bus port.

Firmware Updates for the Interface

Firmware for the VE.Bus to VE.Can interface could be updated using two primary methods:

1. Using a CANUSB: This method required connecting a CANUSB device. During the update process, the solar charger needed to be switched on and connected to the same VE.Can network to provide power to the interface.
2. Using a CCGX: A Remote firmware update could be performed via a Color Control GX, simplifying the process for systems already equipped with a CCGX.

Why the VE.Bus to VE.Can Interface is Deprecated

The VE.Bus to VE.Can interface was made obsolete with the release of CCGX firmware version 1.73. This update integrated the necessary communication and control logic directly into the Color Control GX, eliminating the need for a separate hardware interface to achieve the same functionality, particularly for grid-feedback in Hub-1 systems. If your solar charger display shows "HUB-1" after proper configuration, this indicates that the system is functioning as intended for its original design, even though the interface itself is no longer a current product.

Safety

This article describes a communication interface, which does not present significant electrical hazards in itself. Always follow general electrical safety practices when working with any solar or battery system. This includes isolating power sources, using appropriate personal protective equipment, and ensuring all connections are secure.

When to call a technician instead

If you are working with an older Victron system that still utilizes a VE.Bus to VE.Can interface and encounter communication issues, or if you are attempting to integrate legacy equipment, it may be best to consult with a qualified Victron Energy technician. They can assess the system's configuration and advise on the most appropriate solution, especially given the product's deprecated status.