EV Charging Station - wrong energy read in VRM

[CanalTuto]

Hello,

since 2 days, the energy charged is wrong on VRM “instalation Data”

the correct energy (3.1kwh) appear into EV station table and on the EV Station page

graph count energy with correct value. (7kw)

but today i have a hole on the curve…

Please is somebody can help me to solve it?

Regards

[CanalTuto]

today a reboot charger by switch off the breaker. Bug continue but value is 50% off …

How to report the bug to victron team? thanks

[Lpopescu (Lucian Popescu)]

Hi, we will take a look, thanks for reporting!

[Lpopescu (Lucian Popescu)]

Hi, it seems this is happening because the EVCS is losing the connection with the GX device and there are periods when the energy is not correctly counted. Is there any way to improve the wifi signal for the EVCS?

[RobinSchrooten]

Same issue here… I think I need to find a more stable way to log my energy sessions, so I can correctly do the chargeback to my company… Currently, I need it on VRM, to see the total per year, as that is beeing used for the chargeback

In VRM: 2179 kWh
On EVCS: 3898 Kwh

My wifi AP, is just about 3m away from the EVCS @ -61dbm, so is generaly considered as a good reception (-50 dBm and -67 dBm)

Possibly, if the Total Energy could be logged once a day or so to the VRM (or with queing after each session), so you have some kind of history, it could be helpful

[Dennis1]

https://community.victronenergy.com/t/vrm-displays-wrong-evcs-energy-usage/21563/2

I have te same problem.

Are the a update to solve it?

[Dennis1]

What’s making the difference on the registration?

[vali (Vali M.)]

I reported the same problem here:

VRM displays wrong EVCS Energy usage

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? [VRM-EVCS-wrong-Energy-usage-display]

I confirm that my EVCS is <2m away from my wifi router, signal should be strong at all times!

What I did instead (sorry for repeating the same post from the link above), 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.