Victron Cerbo GX System Controller: Setup & Touch 50 Guide
Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 1 source · Method ↗
Key Takeaways
- The Victron Cerbo GX operates across a wide power supply range of 8 to 70V DC with a supplied 3.15 A slow-blow inline fuse.
- Pairs directly with GX Touch 50 and GX Touch 70 touchscreen displays via integrated HDMI and USB connectors.
- Relay 1 provides multi-function control including generator auto start/stop, alarm signalling, pump control, or temperature triggers.
- Relay 2 operates as a dedicated manual switch or temperature-controlled relay.
- Incorporates onboard interfaces for 4 resistive tank level senders, 4 temperature probes, and 2 digital inputs.
Power Supply & Hardware Installation
The Victron Cerbo GX serves as the central communications brain for Victron energy systems. It monitors inverters, solar charge controllers, batteries, and AC grid meters.
Under Chapter 3 of the Cerbo GX manual, power must be supplied directly from the DC battery bank:
- Operating Voltage: Accepts 8 to 70V DC, compatible with 12V, 24V, and 48V battery systems.
- Inline Protection: The supplied power lead includes an inline 3.15 A slow-blow fuse.
- Power Isolation: The device cannot be powered via Ethernet or USB ports.
GX Touch Display Pairing & Remote Console
The Cerbo GX supports both local touchscreen control and cloud telemetry:
Interface Port | Connected Hardware | Functional Role |
|---|---|---|
HDMI & USB Ports | GX Touch 50 / GX Touch 70 | Real-time graphical system display and touchscreen setup |
VE.Direct Ports (x3) | SmartShunt, MPPTs, BMV | High-speed point-to-point telemetry |
VE.Bus Ports (x2) | MultiPlus-II / Quattro | Inverter/charger system control and grid setpoints |
Ethernet & WiFi | VRM Portal Connection | Cloud monitoring and remote firmware management |
Relay Programming & Analogue Telemetry
The Cerbo GX integrates versatile dry-contact relays and sensor terminals:
- Relay 1 (Multi-Purpose): Can be assigned to trigger an audible alarm, automate generator start/stop based on battery voltage/SoC, or drive pump controls.
- Relay 2 (Auxiliary): Configurable as a manual switch or temperature-triggered relay.
- Sensor Inputs: Built-in terminal blocks support 4 resistive tank level senders (European 0–180Ω or US 240–33Ω), 4 temperature sensors, and 2 digital status inputs.
Frequently asked questions
What is the acceptable DC operating voltage range for the Victron Cerbo GX?
The Cerbo GX accepts **8 to 70V DC** power supply. It cannot be powered through Ethernet or USB, and the supplied power cable includes an inline **3.15 A** slow-blow fuse (August 2026).
How are the GX Touch 50 and GX Touch 70 displays connected to the Cerbo GX?
The GX Touch displays connect via a dedicated HDMI port for video output and a companion USB port for power and capacitive touch input (August 2026).
What functions can be assigned to Relay 1 on the Cerbo GX?
Relay 1 can be configured for alarm signalling, generator auto start/stop, pump control, manual switching, or temperature-based triggering (August 2026).
What analogue sensors can be connected directly to the Cerbo GX terminal blocks?
The Cerbo GX provides dedicated terminal blocks for **4 resistive tank level inputs** and **4 temperature sensor inputs** (August 2026).
References
- Victron Energy: Cerbo GX Manual — accessed 31 August 2026
Related guides
More from what to buy — and how not to get cheated.