What the Cerbo GX Actually Does
The Victron Cerbo GX is a system monitor — a central hub that talks to all your Victron components (MPPT, inverter, SmartShunt, Orion DC-DC) and displays everything on a single dashboard. It connects to Victron's VRM (Victron Remote Management) portal via WiFi or cellular, giving you remote monitoring from anywhere. Think of it as the "brain" of your Victron system.
What It Monitors
- Battery: SOC, voltage, current, time-to-go, history (via SmartShunt or BMV)
- Solar: PV yield, current production, daily/monthly totals, MPPT state
- Inverter: AC output power, load wattage, alarms, mode (inverting/charging/passthrough)
- DC-DC: Charging current from alternator, input/output voltage
- Tank levels: With optional tank level sensors (fresh water, grey water, fuel)
- Temperature: Battery temp, cabin temp, fridge temp (with optional sensors)
Communication Methods
The Cerbo connects to Victron devices via: VE.Direct (wired, one cable per device — MPPT, SmartShunt), VE.Bus (wired, for MultiPlus inverter/chargers), and Bluetooth (for devices that only support BLE). For remote access: WiFi, or a USB cellular modem for off-grid connectivity.
Is It Worth It for a Van?
Yes, if you have 3+ Victron components and want centralized monitoring. The Cerbo GX + GX Touch 50 (7" screen) costs about $350-450 total. That's significant, but the ability to see your entire system at a glance — and diagnose problems before they become failures — has real value for full-time vanlifers.
No, if your system is simple (one MPPT + one SmartShunt). The free VictronConnect app on your phone gives you 90% of the same data via individual Bluetooth connections. You don't need a $350 hub for a simple system.
The killer feature: VRM remote monitoring. When you leave your van parked for weeks (traveling, at work), the Cerbo with a USB cellular modem sends data to the cloud. You can check battery voltage, solar production, and alarms from your phone anywhere in the world. If a fuse blows or the battery drops dangerously low, you know immediately — not when you come back to a dead system.
YOUR ENERGY PROFILE.
This document contains the sizing of your future electrical installation, calculated based on your appliances.
Inventory:
Battery
To guarantee 0WH without damaging your bank (80% max discharge):
Solar
Minimum power required to recharge your consumption:
220V AC
Maximum power (with 25% safety margin).
12V Cable Sizing Guide
Use this professional reference table to select the correct gauge (mm²) for your cables. For 12V in a van, the maximum tolerated voltage drop is 3%. Always use multi-stranded flexible automotive wire.
| Current (A) | Round trip < 2m | Round trip 4m | Round trip 6m |
|---|---|---|---|
| 5A (LEDs, USB) | 1.5 mm² | 2.5 mm² | 4 mm² |
| 10A (Fridge, Pump) | 2.5 mm² | 4 mm² | 6 mm² |
| 20A (Heater) | 4 mm² | 10 mm² | 10 mm² |
| 50A (DC/DC Booster) | 10 mm² | 16 mm² | 25 mm² |
| 100A (Inverter) | 25 mm² | 35 mm² | 50 mm² |
Fuse Sizing
The fuse protects the wire, not the appliance. Always place it as close to the power source as possible (battery or busbar).
- Wire 1.5 mm² → Max fuse 10A
- Wire 2.5 mm² → Max fuse 20A
- Wire 4 mm² → Max fuse 30A
- Wire 6 mm² → Max fuse 40A
- Wire 10 mm² → Max fuse 60A
SCHÉMA ÉLECTRIQUE
PANNEAUX SOLAIRES
0W
REGULATEUR MPPT
BATTERIE AUXILIAIRE
0 Ah
Lithium LiFePO4
BOÎTE À FUSIBLES 12V
Pompe, Leds, Frigo...
CONVERTISSEUR 220V
NON REQUI
SHOPPING LIST
Where to find this equipment? Here is the community-approved selection.
12V 6-way Fuse Box
Mandatory protection
Digital Multimeter
Test your connections
Heavy Duty Crimping Tool
For perfect lugs
Heat Shrink Tubing
Insulation and safety
Comparison table
| Feature | Cerbo GX | SmartShunt App | Verdict |
|---|---|---|---|
| Battery monitoring | Full + history | Full + history | Tie |
| Solar monitoring | Yes (MPPT data) | No | Cerbo wins |
| Remote monitoring | VRM cloud | Bluetooth only | Cerbo wins |
| Tank levels | Yes | No | Cerbo wins |
| Cost | $250-300 | $0 (included) | SmartShunt wins |
| Simplicity | Complex setup | Instant | SmartShunt wins |
About this tool
The Victron Cerbo GX is the central hub of the Victron Energy ecosystem in campervans — a small Linux-based monitoring computer that connects your MPPT controllers, battery monitors, inverter/chargers, and DC/DC chargers via VE.Direct, VE.Can, or Bluetooth, then streams all data to the Victron VRM cloud portal for remote monitoring from anywhere.
What the Cerbo GX actually does in a van: it reads real-time data from every Victron device connected (state of charge, voltages, currents, error codes, temperature), aggregates them into a single dashboard visible on the optional GX Touch 50/70 touchscreen or via the free VRM app on your phone. You can set email/push alerts for low SOC (<20% battery), overvoltage, or device faults. It also controls generator auto-start based on SOC thresholds, which is useful for hybrid setups.
Is it worth it for a basic van build? The Cerbo GX costs around €160-180 new (plus €100 for the GX Touch 50 touchscreen if you want it). If you have a single MPPT controller and one battery bank, a Victron BMV-712 Smart at €80 gives you 95% of the monitoring you actually need via Bluetooth. The Cerbo makes sense when you have 3+ Victron devices to monitor centrally, you want permanent VRM cloud monitoring without opening your phone app, or you need generator auto-start capability.
Setup complexity: connecting a Cerbo GX to a Victron SmartSolar MPPT takes 2-3 minutes via VE.Direct cable. The VRM registration takes under 10 minutes. The main frustration reported on forums (reddit.com/r/vandwellers, diysolarforum.com) is configuring DVCC (Distributed Voltage and Current Control) correctly for lithium batteries — if left at default, the MPPT may overcharge LiFePO4 cells. Set DVCC enabled, SVS enabled, charge voltage limit to 14.2-14.4V depending on your battery BMS recommendation.
Alternative for non-Victron setups: if you use a mix of brands (Renogy MPPT + EG4 battery + random inverter), the Cerbo GX will not communicate with non-Victron devices. In this case, a Raspberry Pi running Venus OS (the open-source Victron firmware) achieves the same result for €40-60 hardware cost, though setup requires basic Linux comfort.
Node configuration best practices for Cerbo GX in a van: Connect the SmartSolar MPPT via VE.Direct cable (not Bluetooth — VE.Direct gives real-time data at 1-second intervals vs Bluetooth's 3-second update). Connect the Multiplus via VE.Bus if present. Connect the BMV-712 battery monitor via VE.Direct for accurate SOC tracking. With these three connections, the Cerbo GX provides a complete real-time picture of solar input, battery status, and AC load on both the touchscreen and remotely via VRM.
VRM (Victron Remote Monitoring) setup for van life: Create a free VRM account at vrm.victronenergy.com, register your Cerbo GX serial number, and enable data logging via the WiFi hotspot in the van OR via 4G USB adapter plugged into the Cerbo GX USB port. VRM stores 14 months of system data — useful for identifying energy patterns, spotting equipment degradation (gradual drop in peak solar production = panel soiling or degradation), and troubleshooting remotely without physical access to the van.
Cerbo GX touch display customization: the 5" GX Touch 50 display (sold separately, €145) shows four configurable panels: battery SOC + voltage, solar power in watts, AC loads, and generator/shore power status. Custom VE.Bus pages allow showing daily production totals. Most van builders mount this at the work desk or above the bed — it becomes the primary "van dashboard" showing everything at a glance.