I have EV Charger NS connected to Inverter out with 3 MultiRS solar as Inverter/Chargers in 3 phase config.
As NS is on out, Inverter consumption total = Current AC non-EV load + EV charger Load
But the picture is another:
Here is a video for better understanding
I have the exact same problem. Did you ever solve this? I would also expect the āAC loadā to be āother AC load than evcsā, at least that would be more useful in my mindā¦
Hi, the EVCS power measurement is an aproximation. The device only measures the current. Not the AC voltage, not the power factor.
In the settings, it can be calibrated on each phase. It is explained in the manual.
Lucian
Thanks for your reply!
In my case the power āestimationā is off by about 1kW, thatās a lot more than I would expect, and itās also just on phase 1, which is odd.
I can only find the setting āpower calibrationā in the āgeneralā settings, this does not allow calibration per phase as far as I can see.
Might I propose that inside VRM at least the line voltage measured by my VM-3P75CT could be used for more accurate power measurements?
At the moment I can only see the power values for each phase through a homeassistant integration. Is it also possible to see the measurement for the current per phase? It might be interesting to see where the power calculation goes wrong.
We donāt want to overcomplicate things. Thatās the setting, try to use it please.
Iām using 0.9 on my instalation and itās pretty close.
Okay, thanks! Iāve set it to 0.84 and at least the overall figure now corresponds roughly to the real power being delivered.
What I find very odd though, is the fact that the charger is only overestimating the power draw on L1:
(This is with the .85 ācalibrationā factor.)
I have two questions regarding the above picture:
I would be very glad if you would be able to help me with the above questions.
Are you sure the power is identical on all 3 phases? The measurement circuit is identic on all 3 phases. So It should report identical values.
Regarding your first questions, if we are displaying a value without displaying the others, it would still be incomplete or wrong.
Yes, our car always charges symmetrically on three phases, it has always been that way with our old charging station and also the VM-375P measures a symmetric power draw on the grid connection as you can see here:
At the same time the EVCS is reporting this:
(still with .84 correction factor)
With regard to showing the measured amperage: yes the measurement would still be incomplete, but if the EVCS knows this data, then why not show it? At least the data would be more complete than they are now.
users are more used to seeing W of kW, not amps, that why it was decided to be like this. If precise measurement is needed, a meter can be added. Or wait for V2, it will have a proper meter inside.
Can you give any indication on V2 launch schedule? Thank you.
sorry but no
Ok, thatās too bad. Based on some earlier posts I thought it was this yearās end, so I have been putting off purchasing an EVCS. Looks like I will need to skip Victron at this time. However, if you are interested in beta testers, please send me a DM, I would be happy to help.
Thanks again for your reply!
I fully agree that showing the wattage in VRM is the best information. But in the console there is a table (see picture above) where the amps can be shown next to Watts but they are not, donāt you think this is odd? Why not show the data that the charger measures if there is a place for it? Then at least I could check if the measured amps are correct or not.
With regard to your comment that users are more used to seeing W/kW instead of amps: if this idea would be integral to Victron design: then why am I selecting an amperage instead of a wattage to select the charge speed in VRM and Victron connect? Or is Victron going to change this in the near future?
In the meantime I was able to check how my second evcs measures the charging speed of our car and this one displays correct values right out of the box, without correction factors and more or less symmetrical loads on all phases, so iām beginning to think that my first evcs is faulty. Iāll contact my supplier about this.
I agree with @Anonimoes on this.
If I am charging to the max of the car, I am primarily interested in kW, but if I am limiting the EVCS (ex. due to maximum current in household), I would like to see the amps as well for easy summary/usage.
