Project:
Cerbo GX Firmware: v3.72
Energy Meter Firmware: V1.11 (function as PV meter)
Energy Meter Firmware: V1.11 (function as Grid meter)
EVCS Firmware: v2.05
Problem I am encountering:
- In the VRM overview, the total consumption is calculated as the sum of the grid meter and the PV meter combined.
- Charging on solar power only does not work; “waiting for sun” remains active.
I expect this has to do with the position of the PV energy meter and the position of the EVCS.
Because I do not (yet) have any inverters in the project, I am unsure how to correctly configure all the settings, such as:
- System configuration > AC system
- EVCS > Settings > Position: AC input or AC output?
- Possibly other settings I may be overlooking?
Snapshot: EV in Manual mode
Snapshot: EV in Auto mode
Snapshot:
As long as your grid meter is reporting positive values, there is (for the evcs) no solar overhead.
If you would be feeding in (negative grid values) it should charge.
Where is your pv inverters energy going, if your actual gridmeter still shows 700W pulled from grid?
I think your pv inverter is feeding in IN FRONT of the grid meter, rather than behind it? So, the grid meter sees no energy flowing to grid?
You are of course right: if the net meter is positive, there is no surplus and the EVCS will not start.
It seems that too much consumption was added, so it is probably legitimate that the EVCS did not want to start.
I will try to find another moment when the customer is at home and able to charge.
However, my question about the total consumption still remains — this does not seem to be correct.
The energy meters are installed correctly:
- The grid meter clamps are placed directly on the wires after the main switch.
- The PV meter is connected directly to the PV circuit.
In this case, there are two single-phase inverters connected to a three-phase group, where I have only used two clamps for the measurement.
As you can see below, the total consumption is 5081 watts, which does not match the actual consumption.
I am also unable to clearly determine how this value is being calculated.
I discovered that I still had a setting on AC-out.
The PV energy meter was also set like this, and I have now adjusted it.
The display now seems to be correct.
Glad I could share this here and get pointed in the right direction again.
Thanks @dognose 
