I have VM-3P75CT energy meter running firmware v1.09 this is measuring the grid supply. My Cerbo GX is running firmware v3.70~27. When I view my system using VRM dashboard, I noticed that the L1 voltage is double the actual Voltage.
If I open the console it displays the correct voltage
Why is this?
Hi @Tonyexe, did you by any chance connect the VM-3P75CT both by CAN and by Ethernet to the Cerbo GX?
The energy meter is connected to the Cerbo GX using the VE-Can connections, over a length of Cat-5E cable
Hmm, I haven’t seen this issue before. Can you tell me the VRM ID (the number in the URL of your VRM installation)?.
I think that this the number you are looking for VRM ID 774239
Yes that’s it, thank you.
I see you also have an ET112 configured as grid meter. My suspicion is that VRM sums the voltage measurements of both meters, resulting in the double L1 voltage value you see. I’ll relay this to the VRM team.
Is there a specific reason you are using two grid meters?
I use the same type as grid meter here, so I looked mine up: was on 1.08.
(VE connect -iOS app- shows no update, vrm portal does show 1.09. Maybe to new to show?)
I just updated mine to 1.09 and values are normal both before and after FW update.
(1 phase, 240v-NL, connection via IP network /modbus)
Edit: Cerbo on v3.63 atm. Will see after updating the cerbo…
edit2 updated cerbo to v3.64 and still ‘expected values’ for grid meter Voltage
The ET112 is measuring the circuit that supplies the ESS, the VM-3P75CT, is measuring the grid supply to the property.
Both energy meters have been in place since the ESS was connected to the grid, The L1 voltage readings were correct until recently, unfortunately I did not notice until this morning the the voltage readings were incorrect.
