SKU: BPP900450110
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The Cerbo GX MK2 is Victron's GX device, the small box that links your inverter-charger, solar charge controllers, battery monitor and lithium BMS so they run as one system. It unlocks ESS, closed-loop lithium charging and generator auto start, and puts everything on Victron's free VRM portal over Wi-Fi or Ethernet.
Runs on 12V, 24V or 48V systems (8 to 70V DC) at 2.8W, rated -4°F to 122°F (-20°C to 50°C)
Three VE.Direct ports for solar charge controllers and battery monitors, expandable to 15 devices over USB
Two VE.Bus sockets for MultiPlus-II and Quattro inverter-chargers
Two VE.Can ports (VE.Can 1 isolated), either one settable to BMS-Can for managed lithium batteries
Four resistive tank level inputs, four temperature inputs and four digital inputs with pulse counting
Two programmable NO/NC relays rated 6A up to 30V DC, 1A up to 70V DC or 6A at 125V AC
Wi-Fi, 10/100 Ethernet, Bluetooth for setup, three USB ports, HDMI for the GX Touch and a microSD slot up to 32GB
3.07 × 6.06 × 1.89 in (78 × 154 × 48 mm) H×W×D, with a fused power cable and two VE.Can terminators included
Current Connected is YOUR Victron product specialist
The Cerbo GX MK2 is the GX device at the center of a Victron system. It connects the inverter-charger, solar charge controllers, battery monitor and lithium BMS, then runs them as one system with shared charge limits, shared sensing and one dashboard, whether that's an off-grid cabin, an RV or a grid-tied home with batteries.
Victron's ESS and its integration with managed third-party lithium batteries both require a GX device, and the Cerbo adds generator auto start, tank monitoring and two programmable relays on top. At 2.8W, it costs almost nothing to leave running around the clock.
With a managed lithium battery, the Cerbo reads the BMS over CAN and passes its charge voltage and current limits to every charger in the system. When the BMS asks for less current because the cells are cold or nearly full, the inverter-charger and the solar charge controllers all back off together. Victron calls this DVCC (Distributed Voltage and Current Control), and it also shares one battery voltage, temperature and current reading across the chargers.
Victron's compatibility list covers its own lithium batteries plus brands like the Pytes V5 server rack battery. Since either VE.Can port can run as BMS-Can, the MK2 handles a CAN battery and a chain of VE.Can devices such as a Lynx Shunt at the same time, each on its own bus.
ESS is Victron's grid-tied operating mode. It runs the house from solar and battery first, and it can schedule charging around time-of-use rates and use VRM's solar forecast for planning. Victron's minimum ESS system is one MultiPlus or Quattro plus one GX device, so a Cerbo and a MultiPlus-II 48/3000 inverter charger cover it.
Relay 1 starts and stops a generator on battery state of charge, battery voltage, AC load or a schedule, with quiet hours and warm-up and cool-down times. The logic runs on the Cerbo itself, so the cabin generator still starts when the internet is down.
Relay 2 switches on temperature or by hand for a fan, pump or alarm. The four digital inputs read door and bilge alarms, a generator run signal or a pulse meter.
Four resistive tank inputs read fresh water, fuel and black water senders, with custom labels and critical level alarms on the dashboard. Four temperature inputs, used with Victron's temperature sensor, watch a battery compartment, engine bay or freezer.
Over Wi-Fi or Ethernet, the Cerbo uploads to VRM, Victron's remote monitoring portal, free for any number of installations. You get live power flows, history, alerts and phone widgets, and Remote Console opens the Cerbo's full menu in a browser so you can change settings without driving out to the site. Logging continues through an internet outage, and a microSD card adds local storage.
For a cabin or RV with no internet service, the GX LTE 4G cellular modem gives the Cerbo its own connection.
Remote access covers most systems, but a screen on the wall is the fastest check for everyone else in the house. The GX Touch 50 or 70 display connects on one combined cable (HDMI for video, USB for power) and shows the same live overview and menus as Remote Console.
Three VE.Direct ports cover most systems, and VE.Direct to USB adapters raise the total to 15 devices through the USB ports, with a powered USB hub when you run out of ports. Inverter RS and Multi RS models connect over VE.Can instead of VE.Direct.
The Cerbo mounts on a wall, or on a 35mm DIN rail with Victron's DIN35 adapter (sold separately). Terminate each VE.Can network at both ends with the included terminators. Planning a system with more chargers than ports? Our team is happy to help with sizing.
No. The Cerbo runs fully without a screen. You can set it up and check it through VRM in a browser or the VRM app, or locally through Remote Console over your network or the Cerbo's own Wi-Fi access point.
It ships with a DC power cable that has a 3.15A slow-blow inline fuse and M8 ring terminals, so it lands directly on the battery or a DC busbar and plugs into the 2-pin Power In terminal. The input takes 8 to 70V DC, so the same cable works on 12V, 24V and 48V, and the Cerbo can't be powered over USB or Ethernet.
Yes. Battery communication, charge control, generator start and stop, relays and the GX Touch all run locally. Internet is only needed for VRM, and you can still reach Remote Console on site over Ethernet or the Cerbo's Wi-Fi access point.
The original Cerbo GX has one VE.Can port and one BMS-Can port. The MK2 has two full VE.Can ports, with VE.Can 1 isolated, and either one can be set to BMS-Can. All three USB ports are usable on the MK2 (the original reserved one to power the GX Touch), the digital inputs add pulse counting, and the RJ45 sockets are turned around so cables come out more easily.
The MK3 has the same ports and connections and a faster quad-core processor. It supports up to 25 VE.Direct devices against the MK2's 15, and the extra speed matters most for heavy Node-RED or Signal K use. Both share the same Victron manual.
I was hesitant to buy the Cerbo GX. I am glad I did. Original thinking was, why do I need this? I'll just use the Victron Connect App. That said, Batteries and Victron Eco-sSystem is in the workshop. Nice to see everything from your bed or kitchen table without going to the shop. Easy to Firmware updates as well. Higly Recommend this piece of gear!!
Awesome way to control your Victron devices and add in some relays and gauge inputs. I am able to trend my 500 gal lp tank level through the online VRM using the existing tank gauge with a 0-90 ohm add on. Works great
