Victron Cerbo GX MK2
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Overview
The Cerbo GX MK2 is the brain of a Victron power system. It pulls every battery, inverter, charger, MPPT, tank sensor, and temperature probe into one live dashboard — viewable on a screen at the helm, on your phone via the free VictronConnect app, or from anywhere in the world through the Victron Remote Management (VRM) portal. Whether you're at anchor, parked at a remote site, or back home checking on a cabin, the Cerbo GX gives you a clear picture of what your system is doing and the controls to adjust it.
The MK2 revision is a meaningful upgrade over the original Cerbo GX. Both CAN bus ports are now fully functional (no more BMS-only port), VE.Can 1 is isolated, all three USB ports work for data (not just one as a power feed to the GX Touch), NMEA 2000-out is supported (via VE.Can 2 with an optional Victron cable), and digital inputs can do pulse counting. The RJ-45 sockets have been rotated 180° so cables come out the right side for cleaner DIN-rail installations.
If you're building a Victron system — or expanding one — this is where it all comes together.
Key Features
- Whole-system monitoring — Live readings for battery state of charge, power flow, PV harvest, generator status, shore/grid input, tank levels, and temperatures, all on one screen.
- Remote access via VRM — Check on your system from your phone or laptop anywhere with internet. Receive alerts, run diagnostics, and adjust settings without being on board.
- Two fully functional VE.Can ports (new in MK2) — Connect more devices to a single Cerbo GX. VE.Can 1 is galvanically isolated, which simplifies installations where the canbus runs between systems that don't share a common ground.
- NMEA 2000-out via VE.Can 2 — With the optional Victron VE.Can–to–NMEA 2000 Micro-C cable, push Victron data onto a boat's NMEA 2000 backbone so your chartplotter or MFD can display battery, inverter, and tank information alongside navigation data.
- Bluetooth setup with VictronConnect — Configure the Cerbo on a phone before you even mount it. No more juggling laptops in tight engine rooms.
- Generator auto start/stop — Set rules based on state of charge, time of day, or load, and the Cerbo handles the rest.
- Built for system expansion — Supports large lithium battery banks and many connected VE.Can solar chargers, so the same Cerbo that runs a 12V dinghy upgrade can also run a whole off-grid cabin.
- Pairs with the GX Touch display — Add a slim, weather-resistant GX Touch 50 or 70 display for an at-a-glance dashboard at the helm or in a coach.
Technical Specifications
| Specification | Value |
|---|---|
| Model / Part Number | BPP900450110 |
| Supply voltage | 8 – 70 VDC |
| Power draw (without GX Touch) | 2.8 W @ 12 V |
| Power draw (with GX Touch) | Backlight off: 3.8 W @ 12 V · Backlight on: 4.8 W @ 12 V |
| VE.Direct ports | 3 (always isolated). Max possible VE.Direct devices: 15 with VE.Direct USB and Bluetooth dongles. |
| VE.Bus port | 1 (with 2 paralleled RJ45 sockets, always isolated) |
| VE.Can ports | 2 — VE.Can 1 isolated, VE.Can 2 non-isolated. VE.Can 2 also serves as the BMS-Can connection. |
| USB ports | 3 host ports (all fully functional on the MK2) |
| Ethernet | 1 × 10/100 RJ45, isolated except shield |
| Wi-Fi | Built-in. 2.4 GHz (range 2.412 – 2.462 GHz; 88.1 mW) |
| Bluetooth | Built-in. 2.402 – 2.48 GHz; 5.2 mW (for VictronConnect configuration) |
| NMEA 2000-out | Supported via VE.Can 2 with the Victron VE.Can–to–NMEA 2000 Micro-C cable accessory (sold separately) |
| Resistive tank level inputs | 4 |
| Temperature sense inputs | 4 |
| Digital inputs | 4 (with pulse counting on the MK2) |
| Relays | 2 × programmable NO/NC. Rated: DC up to 30 VDC, 6 A · DC up to 70 VDC, 1 A · AC 6 A, 125 VAC |
| Mounting | Wall or DIN-rail 35 mm (DIN-rail mounting requires the Victron DIN35 Adapter accessory) |
| Operating temperature | -20 to +50 °C (-4 to 122 °F) |
| Dimensions (h × w × d) | 78 × 154 × 48 mm (3.07 × 6.06 × 1.89 in) |
| IP rating | IP20 |
| Compliance — Safety | IEC 62368-1 |
| Compliance — EMC | EN 301489-1, EN 301489-17 |
| Compliance — Automotive | ECE R10-6 |
Specs verified against the Victron Cerbo GX Manual (section 21.2) and the Cerbo GX / GX Touch datasheet.
Applications & Use Cases
Marine
On a boat, the Cerbo GX is usually mounted at the nav station or in an electrical locker, with a GX Touch display at the helm. Common setups pair it with a MultiPlus or Quattro inverter/charger, one or more SmartSolar MPPT charge controllers, a SmartShunt battery monitor, and lithium house batteries. The NMEA 2000-out support means the same data can show up on your chartplotter — handy for sailboats running multi-day passages where you want battery state on the same screen as wind and depth. Generator auto start/stop is particularly useful for long anchor stays.
RV
In a coach or trailer, the Cerbo GX ties together your house batteries, inverter/charger, solar, and DC-DC charger from the alternator. Pair it with a GX Touch 50 in the coach interior, and you have a clean dashboard showing how much solar you're harvesting, how much load you're running, and what state your batteries are in. Remote VRM access is the killer feature for RVers — you can check on the fridge battery state while you're away from the rig.
Off-grid and cabin
For an off-grid home or remote cabin, the Cerbo GX is the heart of an Energy Storage System (ESS). It coordinates solar, battery, generator, and (where applicable) grid input to keep loads running and batteries topped up. With VRM, you can monitor and troubleshoot the system from anywhere — useful when the cabin is hours away or you're managing several sites.
Compatibility & System Integration
The Cerbo GX MK2 talks to virtually every smart Victron product made in the last decade. Here's how the integrations work:
- Inverters and inverter/chargers (VE.Bus): MultiPlus, MultiPlus-II, Quattro, Quattro-II, Phoenix Inverter Smart — connect via the VE.Bus port using a standard RJ45 cable.
- Solar charge controllers (VE.Direct or VE.Can): SmartSolar MPPT 75/10 through 250/100. Smaller units use VE.Direct; larger units have VE.Can.
- Battery monitors (VE.Direct): SmartShunt and BMV-712 connect via VE.Direct for live state of charge readings.
- Lithium batteries (VE.Can / BMS-Can): Victron Lithium NG, Smart Lithium with Lynx Smart BMS, and many third-party BMS-Can–compatible batteries (Pylontech, BYD, etc.).
- DC-DC chargers (VE.Direct): Orion-Tr Smart and Orion XS series for monitoring charge from the alternator.
- Tank and temperature sensors: Four resistive tank level inputs plus four temperature sense inputs (PT1000 sensors with the Victron temperature sensor accessory).
- Displays: GX Touch 50 (5-inch) or GX Touch 70 (7-inch). Top-mount versions are rated IP54; flush-mount versions are IP65. Both connect via HDMI + USB.
- Marine networks: NMEA 2000-out is supported via VE.Can 2 with the optional Victron VE.Can–to–NMEA 2000 Micro-C cable, broadcasting battery, inverter, AC, and tank data onto a boat's N2K backbone.
- Modbus TCP / MQTT: The Cerbo exposes data over the network for integration with Home Assistant, Node-RED, and other home-automation or building-management platforms.
Care & Maintenance
The Cerbo GX is a solid-state device with no moving parts — there's nothing to lubricate, clean, or replace on a schedule. A common approach is to leave it powered continuously so VRM stays up to date and firmware updates can install automatically when you're connected to the internet.
A few practical notes:
- Firmware updates: Run automatically over Wi-Fi or Ethernet when connected. You can also push updates manually via VRM or VictronConnect.
- Ventilation: The Cerbo doesn't run hot, but give it the same airflow you'd give any DIN-rail electronics — avoid sealed boxes with no air exchange.
- Mounting location: Keep it dry. The Cerbo itself is rated IP20 (not waterproof); the GX Touch display is the option for wet locations at the helm.
- Backup of settings: Once your system is dialed in, exporting the settings file via VictronConnect or VRM gives you a safety net if you ever need to restore.
Troubleshooting
Most Cerbo GX issues fall into a handful of categories. Here are the ones we see most often and how to sort them out:
- A connected device isn't showing up. Check that the cable is fully seated (VE.Direct cables click when properly inserted) and that the device has power. For VE.Can devices, confirm there's a 120Ω terminator at each end of the bus.
- VRM shows the system offline. Usually a network issue. Confirm the Cerbo has a working internet connection (Wi-Fi or Ethernet) and that the time/date are correct. A common cause is a Wi-Fi network change that the Cerbo wasn't updated for.
- GX Touch display is blank. Check both the HDMI cable and the USB power cable — the Touch needs both. On MK2 Cerbos, any of the three USB ports can power the Touch; on the original Cerbo, only one specific port could.
- Firmware update keeps failing. Try a manual update file pushed via USB stick or VictronConnect; the over-the-air updater occasionally times out on slow connections.
- NMEA 2000 not appearing on the MFD. Confirm you're using the Victron VE.Can–to–NMEA 2000 Micro-C cable on VE.Can 2 (NMEA 2000-out isn't native on a stock VE.Can port — it needs that specific cable). Then confirm the N2K backbone has proper termination and 12V power, and that the Cerbo's NMEA 2000-out is enabled in settings.
For anything that isn't on this list, our team is happy to help — email support@bluemarine.com with a description of what you're seeing and a screenshot from VRM if you can.
Frequently Asked Questions
Do I need a Cerbo GX if I already use VictronConnect?
VictronConnect works great for monitoring a single Victron product over Bluetooth — checking on one SmartSolar MPPT or a SmartShunt is straightforward. The Cerbo GX comes into play when you have multiple Victron devices and want them on one dashboard, remote VRM access from anywhere, advanced features like generator auto start/stop, or NMEA 2000 integration with a chartplotter. If your system has more than a couple of Victron components, the Cerbo is usually worth it.
What's the difference between the Cerbo GX and the original Color Control GX (CCGX)?
The Cerbo GX replaced the CCGX as Victron's main GX device. It has a more powerful dual-core processor, more ports (3× VE.Direct, 2× VE.Can on the MK2, 3× USB), built-in Wi-Fi and Bluetooth, and supports larger systems. It also doesn't include a built-in display — you add a GX Touch 50 or 70 if you want a screen, which gives you flexibility on where the display sits relative to the brains.
Can the Cerbo GX work without internet?
Yes. The Cerbo works fully offline — local monitoring, control, generator start/stop, and ESS functions all run without an internet connection. You only need internet for remote VRM access and over-the-air firmware updates. Plenty of customers run Cerbos on boats and cabins that go weeks without a connection.
Does the Cerbo GX MK2 work with my existing GX Touch display?
Yes. The Cerbo GX MK2 is fully compatible with both the GX Touch 50 and GX Touch 70 displays. Connection is HDMI plus USB — the same as the original Cerbo. Any of the three USB ports on the MK2 can power the Touch (vs. only one specific port on the original).
Warranty
Victron backs the Cerbo GX MK2 with a 5-year limited warranty, upgradable to 10 years for an additional 10% of the initial investment. Victron handles warranty claims through the distributor that sold the unit — if you bought yours from Blue Marine, that's us. We'll troubleshoot with you first, then work with Victron on a repair or replacement if it comes to that. Email support@bluemarine.com to start a claim.
Resources
- Victron Cerbo GX MK2 product page (Victron Energy)
- Power Smarter: The Victron Cerbo GX — the Brain of Modern Marine, RV and Off-Grid Power Systems (Blue Marine blog)
- Accessing Your Power System From Anywhere with Victron's VRM (Blue Marine blog)
- How to Integrate RuuviTag Sensors into a Victron System (Blue Marine blog)
Warranty Information
Shipping & Returns
We offer free shipping over $49. Lithium batteries & oversize items may have an applicable shipping charge.
We know returns are no fun so we aim to make the return process as hassle free as possible! We have a 60-day return policy, which means you have 60 days after receiving your item to request a return.
Lithium batteries and products with lithium batteries inside are non returnable: Due to carrier regulations surrounding the shipment of lithium batteries (classified as a fully regulated hazardous material), we are unable to accept returns unless arranged locally. We appreciate your understanding and encourage you to contact us with any questions prior to purchase.
For more information on returns, visit our return policy page.
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