Header image: an AI-generated illustration of a Cerbo GX with a GX Touch screen installed on a boat.
New Victron · Cerbo GX MK3 · Monitoring and control
Victron has given the Cerbo GX – the brain of most motorhome, caravan and boat installations – a 내부 upgrade. On the outside, it’s identical to the MK2 and doesn’t even say «MK3». The question you’re all asking is whether you need to replace it. We’ll explain it to you straight up and, whilst we’re at it, tell you where the real value of this equipment lies.
Short answer
The Cerbo GX MK3 (part number BPP900451130) retains the same connections as the MK2, but features a more powerful processor and supports up to 25 VE.Direct devices, compared to the MK2’s 15. If your setup is a simple campervan, your MK2 will be more than enough. If you have a large boat, lots of controllers or use Node-RED, the MK3 is definitely worth it.
Key specifications of the Cerbo GX MK3:
Victron Cerbo GX with GX Touch 50 touchscreen. Image: Victron Energy.
Victron has focused the revamp on the interior. Here are the changes that matter:
01
More power
New 1.4 GHz quad-core, 64-bit processor with DDR4 memory: three to four times the processing power. VRM, Node-RED and Signal K now run more smoothly.
02
Up to 25 VE.Direct units
Ten more than the MK2. Useful when connecting lots of MPPT controllers, battery monitors or chargers via USB interfaces.
03
The same connections
Relays, digital inputs, tank inputs and temperature inputs, VE.Can, VE.Bus, VE.Direct, USB and Ethernet remain unchanged. It is wired exactly the same as the MK2.
What is known today, compared point by point:
Cerbo GX MK2
Cerbo GX MK3 (new)
How do I know which Cerbo model I have?
Check the label on the back. The MK3 has the reference number BPP900451130. If it says BPP900450110 or BPP900451100, it’s an MK2, and BPP900450100 is the first generation. You won’t see «MK3» written on the box or the casing.
Campervan and basic caravan
A battery, a regulator, a charger and little else: your MK2 has more than enough. Don’t replace the Cerbo; invest in getting the most out of it.
A large boat or a lot of equipment
Various MPPT controllers, monitors, chargers and storage units: the limit of 25 VE.Direct devices and the extra power really do make a difference.
Node-RED and advanced automation
If you programme flows in Node-RED or use Signal K, the MK3 offers more flexibility. And if you’re buying a new Cerbo, go for the MK3.
AI-generated illustration: on the outside, the MK2 and MK3 are identical. The difference lies in the label reference.
What hardly anyone uses
Most installations only use the Cerbo to check the battery level on a mobile phone. But it has two programmable relays, four digital inputs, four fuel tank inputs and four temperature inputs that almost nobody connects. That’s where you really get the most out of it, whether you have an MK2 or an MK3.
Three real-life examples
We have put together a practical guide containing all the wiring diagrams, based on the official manual for the Cerbo GX and the book «Cableado sin límites» by Victron: relays, tank pump, temperature relay, generator start and stop, digital inputs, tank and temperature sensors, and how to wire it all up correctly. Suitable for MK2 and MK3.
Download it for free at fvcomponentes.com/guia-cerbo-gx. And if you know anyone with a campervan or a boat, share this with them: you’ll save them a fair bit of hassle.
Cover of the guide «Get the most out of your Cerbo GX» by FV Componentes (20 pages, free PDF).
Conclusion
The Cerbo GX MK3 is a real improvement on the inside: more power, DDR4 memory and up to 25 VE.Direct devices, with the same connections as always. If you’re buying a new Cerbo, go for the MK3. If you already have an MK2 in a campervan or caravan, there’s no need to replace it: make the most of its relays, inputs and sensors.
Free guide
Download the 20-page guide containing all the diagrams. And if you’re setting up your system, at FV Componentes you’ll find the Cerbo GX and all the Victron equipment.
What is the Cerbo GX MK3?
This is the third generation of the Cerbo GX from Victron, the communications hub that monitors and controls your system. It retains the MK2’s connectivity whilst featuring a more powerful processor, DDR4 memory and support for up to 25 VE.Direct devices.
How can I tell the difference between a Cerbo GX MK3 and an MK2?
According to the reference on the back label: the MK3 is BPP900451130 and the MK2 is BPP900450110 or BPP900451100. They look identical from the outside.
Is it worth upgrading my Cerbo GX MK2 to the MK3?
Not in a simple campervan or caravan. It’s worth it on boats or in set-ups with a lot of equipment VE.Direct, or if you use Node-RED or Signal K extensively.
Does the Cerbo GX MK3 connect in the same way as the MK2?
Yes. It has the same ports: relays, digital inputs, tank and temperature inputs, VE.Can, VE.Bus, VE.Direct, USB and Ethernet.
Where can I download the guide to relays and sensors for the Cerbo GX?
Available free of charge at fvcomponentes.com/guia-cerbo-gx. There are 20 pages of diagrams based on the official documentation from Victron, suitable for MK2 and MK3.
Sources: Victron Energy, «Ekrano GX / Cerbo GX / Nucleo GX» manual (ref. 140558); Panbo, «Victron unveils faster Cerbo GX MK3» (2 October 2026); distributor data sheets with reference BPP900451130. Data reviewed on 14 November 2026.
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