Ultimate Guide to Victron Communication Types: VE.Direct, VE.Can, VE.Bus & VE.BMS

When building a reliable energy system with Victron Energy components, understanding the various communication types is key to seamless integration and optimal performance. Whether you're connecting solar chargers, inverters, or battery management systems, choosing the right communication protocol ensures efficient data flow and device control. This guide breaks down the four major Victron communication standards: VE.Direct, VE.Can, VE.Bus, and VE.BMS.

VE.Direct: Simple and Powerful for Small Devices

VE.Direct is a compact communication protocol used primarily with Victron's smaller devices, such as MPPT solar charge controllers and BMV battery monitors.

Technical Specs:

• Connector: 4-pin JST PH 2.0

• Pinout:

  • Pin 1: GND

  • Pin 2: RX (Receive)

  • Pin 3: TX (Transmit)

  • Pin 4: Power +

• Note: Pins 2 and 3 are crossed in standard VE.Direct cables.

Usage Notes:

• VE.Direct provides detailed data and up to 30 days of history when connected to a GX device (e.g., Cerbo GX).

• In contrast, when using VE.Can for MPPTs, only 2 days of history are available on the GX device.

• Standard communicaiton for Smart Shunts and MPPTS

Popular Accessory:

• VE.Direct to USB Interface

This adapter is useful for connecting VE.Direct devices directly to a computer or GX device for monitoring and firmware updates.

VE.Can: Robust Communication for Larger Systems

VE.Can is Victron's implementation of the CAN bus standard, designed for more complex systems involving multiple devices.

Technical Specs:

• Supports up to 20 devices on a single network

• Requires terminators on each end of the bus

• Galvanically isolated for improved electrical safety

• Communication can be configured to RV-C standard

Important Notes:

• Devices like Wakespeed WS500 require a cross-over cable when using VE.Can

• Use VE.Can for large MPPT solar chargers, Lynx distributors, and more

VE.BMS: The Bridge for Lithium Battery Systems

VE.BMS (Battery Management System) handles communication between smart lithium batteries and other Victron components. It ensures safe operation by managing charge and discharge currents.

Key Features:

• VE.BMS CAN or second CAN port is not galvanically isolated

• Can be reconfigured to function as VE.Can

• Supports RV-C configuration

Best Use Cases:

• Ideal for integrating Victron Smart Lithium batteries

• Use with GX devices for system monitoring and control

VE.Bus: Communication Backbone for Inverters and Multiplus

VE.Bus is used to interconnect Victron inverters, MultiPlus, Quattro units, and monitoring equipment.

Specs & Features:

• Based on RS485 protocol

• Operates at 500kb/s

• No terminators required

• Common devices: MultiPlus, Quattro, Inverter RS, GX devices, and MK3-USB Interface

VE.Bus simplifies the setup of complex inverter/charger systems with parallel, split-phase, or three-phase configurations.

Final Thoughts

Choosing the correct Victron communication type can significantly affect the performance, data visibility, and expandability of your energy system. Whether you're setting up a basic off-grid setup or a high-end mobile power system, understanding these protocols ensures you're building a smart, scalable, and future-proof energy solution.

Need help choosing the right cables or accessories? Explore our collection of Victron-approved connectors and interfaces in our online store or contact our support team for personalized recommendations.