Adding a cerbo gx to an existing VRM installation

Q&A and troubleshooting
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1

I have a new Cerbo GX (mk2) and have tried to add this to my existing VRM installation (which was based on a Globallink 520) but it has created a new installation called Cerbo GX. Is there a way to have both devices in one VRM page

2

I have not tried with a globalink.
The normal replacement procedure for a GX is done in the vrm under more- settings - general - scroll to the bottom - click replace the gx in this installation - follow the instructions there

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1 Like
3

LX,

Many thanks for your post. I have read that the 520 and Cerbo GX are not compatible, so presumably I need to have 2 VRM pages, one based on each. To connect the Cerbo to VRM I am considering a WiFi hotspot with SIM card. The 520 will continue to use LTE-M.

4

Another thought is does anyone know the SIM card data requirements for the Cerbo GX to update the VRM. Currently set to every 15 minutes, would 500MB a month be enough? Angus

5

For logging yes. If you are accessing the remote console over VRM it can eat up a bit.
Make sure that your auto updates are off as well.

6

LX,

It was just for logging. If accessing VRM that would be on my phone. Many thanks for reminder about auto updates:-)

Angus

7

You can’t have two GX devices managing a site.
One or the other.

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8

Q9: Can I use the GlobalLink with a GX device (e.g Cerbo GX)

No, it is impossible to use a GlobalLink with a GX device.

The GlobalLink is intended to be used instead of a GX device to connect one or two supported VE.Direct devices directly to VRM via the built-in LTE-M connection. Data will be sent straight to the VRM portal, no GX device is required.

You cannot connect the GlobalLink directly to a GX device, it is designed to connect to the supported VE.Direct devices (such as BMV or MPPT) directly. If you would like to connect your GX device to a 4G network use the GX LTE 4G instead.

From its manual.

9

Many thanks, I can see that now. I will still use the Cerbo GX onboard for tank sensors and some other tasks and keep the BMV and solar MPPT with the GlobalLink. Unfortunately the LTE-M signal is a bit unreliable in Western Scotland.