Hi all,
since a while I noticed that VRM is displaying a much lower EVCS Energy usage in the summary graph (see image) than what was actually charged into the car. It is nearly a factor of 2 lower. I have a power calibration factor of 0.81 set in the EVCS to match the actual charged power to what the car is displaying, but this could not be the reason for this discrepancy. Does anybody has an idea why is that?
No, it is not fixed!
What I did instead, I installed an EM540 energy meter to accurately measure EVCS power and energy consumption. I correctly configured its role as EV Charger in Cerbo, but this generated an even bigger problem. Now VRM adds the power measured by the external meter to the one estimated by the EVCS (as it would be two charging events)! There is no way to switch off the internal EVCS (wrong) energy estimation when using an external energy meter.
@Victron; why not implementing a toggle switch in EVCS software to disable internal power estimation when using an external energy meter? Or, at least, enable a power correction factor 0 (minimum now is 0.6) in EVCS, so its power is not counted twice.