Victron Venus OS Large: Node-RED and Signal K Setup Guide

Key Takeaways

• Venus OS Large is an extended firmware version that adds Node-RED and Signal K.
• Installation requires accessing the GX device's firmware update menu.
• You must specifically select the "Large" image type during the update process.
• The installation typically involves a reboot that takes approximately 2 minutes.

How do I install Victron Venus OS Large for Node-RED and Signal K?

You install Victron Venus OS Large by updating your GX device's firmware and selecting the 'Large' image type. This extended version provides Node-RED and Signal K functionalities for advanced system integration and marine instrumentation.

Installation Steps for Venus OS Large

Follow these steps to update your Victron GX device to Venus OS Large, enabling Node-RED and Signal K.

1. Access the Firmware Update Menu: On your GX device, navigate through the menu to Settings -> General -> Firmware -> Online updates. We checked the manual dated 2026-08-23, which states this is the current path.
2. Select Image Type: Within the firmware update menu, locate the "Image type" setting. Set this option to Large. This selection ensures you download the extended version of Venus OS.
3. Check for and Install New Version: After setting the image type, navigate one level back in the menu. Then, check for a new firmware version and proceed with the installation.
4. Wait for Reboot: The GX device will reboot to complete the installation. This process typically takes about 2 minutes. Do not interrupt the power supply during this time.

Features of Venus OS Large

Understanding Node-RED and Signal K

Node-RED Node-RED is a powerful, low-code programming tool that comes with Venus OS Large. It allows you to connect hardware devices, APIs, and online services using a browser-based editor. This enables custom automation, data logging, and integration with other systems based on your specific needs. For example, you can use Node-RED to create custom alerts, control relays based on system conditions, or integrate Victron data with home automation platforms.

Signal K Signal K Server is a marine navigation server pre-installed on Victron GX devices when running Venus OS Large. It acts as a central data hub for marine instruments, allowing you to serve a full-featured marine instrumentation package. This data can be accessed by compatible applications such as the iOS WilhelmSK App or KIP, providing comprehensive monitoring and navigation capabilities for marine applications.

Safety: Software Installation Considerations

Installing Venus OS Large is a software update process. It does not involve direct electrical hazards like high voltages or currents. However, it is crucial to ensure a stable power supply to your GX device throughout the update. Interrupting power during the firmware installation can corrupt the device's software, potentially requiring advanced recovery procedures.

When to call a technician instead

If your GX device fails to reboot after the update, or if you encounter persistent errors that prevent the installation of Venus OS Large, it is advisable to contact a qualified Victron Energy technician or your installer. The Victron Community is also a good place to ask questions and get answers for common issues, as commonly reported by installers. Attempting to force a software recovery without proper knowledge can further complicate the issue.