Cerbo GX Installation

15. FAQ
15.1. Q1: I cannot switch my Multi/Quattro system on or off
To solve the problem, first find out how the system is connected, and then follow the right step by step instruction below. There
are two ways to connect a Multi/Quattro system to a Cerbo GX. In most systems they will be connected directly to the VE.Bus
port on the back of the Cerbo GX. And, option two, in some systems they are connected to the Cerbo GX using a VE.Bus to
VE.Can interface.
Step by step instructions when connected to VE.Bus port on the Cerbo GX
1. Update the Cerbo GX to the latest available version. See our blog posts in the https://www.victronenergy.com/blog/category/
firmware-software/.
2. Do you have a Digital Multi Control or VE.Bus BMS in the system? In that case it is normal that on/off is disabled. See also
the VE.Bus related notes in the Cerbo GX manual
3. In case you have had a Digital Multi Control or VE.Bus BMS connected to your system, the Cerbo GX remembers it and even
when those accessories have been removed the On/off switch will still be disabled. To clear the memory, execute a Redetect
system, the option is in the Multi or Quattro section of the Cerbo GX menu.
4. For parallel/three phase systems consisting of more than 5 units: depending on temperature and other circumstances, it might
not be possible to switch a system back on after switching it off with the Cerbo GX. As a work around you'll need to unplug the
VE.Bus cable from the back of the Cerbo GX. And plug it back in after starting the VE.Bus system. The real resolution is to
install the “Cerbo GX dongle for large VE.Bus systems”, partnumber BPP900300100. For details, read its connection
instruction.
Step by step instructions when connected to Cerbo GX via VE.Can.
1. Update the Cerbo GX to the latest available version. See our blog posts in the firmware category.
2. Update the VE.Bus to VE.Can interface to the latest version. The easiest way to do that is by using Remote firmware update:
having a special piece of hardware, the CANUSB, is then not necessary.
3. Do you have a Digital Multi Control or VE.Bus BMS in the system? In that case it is normal that on/off is disabled. See also
the VE.Bus related notes in the Cerbo GX manual
4. In case you have had a Digital Multi Control or VE.Bus BMS connected to your system, and it is now no longer connected, the
Canbus interface remembers it. Therefore, even after those accessories have been removed, the On/off switch will still be
disabled. Clearing this memory is unfortunately not possible yourself, please contact us so we can help you.
15.2. Q2: Do I need a BMV to see proper battery state of charge?
Moved here.
15.3. Q3: I have no internet, where can I insert a sim-card?
There is no 3G modem in the GX Device, and therefore also no slot for a sim-card. Go to a local store and buy a 3G router with
Ethernet ports. More information in the blog post link below and particularly in the comments section, as more users try differing
equipment:
https://www.victronenergy.com/blog/2014/03/09/off-grid-color-control-gx-to-vrm-portal-connectivity/
Note that it is not possible to use a VGR2 or VER for this. Also it will not be possible in the foreseeable future.
15.4. Q4: Can I connect both a GX Device and a VGR2/VER to a Multi/Inverter/
Quattro?
No. Also, instead of this combination, we recommend to use the Cerbo GX, and add a 3G or similar mobile router. See Internet
connectivity [14].
15.5. Q5: Can I connect multiple Cerbo GX to a Multi/Inverter/Quattro?
No.
15.6. Q6: I see incorrect current (amps) or power readings on my Cerbo GX
Examples are:
• I know that a load is drawing 40W from the Multi, but the Cerbo GX shows 10W or even 0W.
Cerbo GX Manual
Page 70 FAQ