Can the maximum current slider be changed?

[lawrencemaroun]

The maximum current slider only goes up to 32a. I have a 40a charger and I can't set it to 40a.

[dreimer1986]

Maybe it would be an idea to add a max current value to the initial configuration.
I have a 16A charger for example and setting more causes a SuspendedEV state.
This would allow you to select 40A as maximum and me to select 16A.
As this is a number entity and the max is just set to 32 by default, it can be set to something else, too.
At least I was able to hackfix it with the following entry in my customize.yaml:

number.evbox_maximum_current:
  max: 16

Optional as not needed, but nice for showing what you are setting up in the UI:

  unit_of_measurement: A

So if you do the same with 40 as max value and the correct entity name, it might help you until there is another fix.

Sadly someone over at Home Assitant had the questionable idea to remove the customize panel in 12.2021 because it was not perfect...
It would have made things easier for the non hardcore freaks dreaming in yaml by now ^^

EDIT:

Likely in your case there might be a limit in api.py, too.

    async def set_charge_rate(self, limit_amps: int = 32, limit_watts: int = 22000):

@ line 527 looks like it could be a problem for your case. Maybe change that to 40 is working, maybe not...

And while you are at it you of course could go into numbers.py @ line 34...

NUMBERS: Final = [
    OcppNumberDescription(
        key="maximum_current",
        name="Maximum_Current",
        icon=ICON,
        initial_value=32,
        min_value=0,
        max_value=32,
        step=1,
    ),
]

... and could change the max value here, too.

[lbbrhzn]

ok, thanks for checking!

[dreimer1986]

@lawrencemaroun Germany. We use three phases with 230V here. (Some use one only) Normally we have 16A on three phases which is about 11kW. Some have 22kW, too aka 32A on all three phases.

@lbbrhzn thanks for the real fix. I can confirm that reducing is working. ^^

[lawrencemaroun]

@dreimer1986 wow, I did not realize how much more power you can carry with three phases. Even considering that there is a neutral conductor, 4 conductors carrying 16a each seems intuitively like it would carry the same amount of power as two conductors carrying 32a. But 230v at 32a is only 7.3kw and yet you can carry 11kw with the same amount of copper if you use three phase vs single phase.

[drc38]

@dreimer1986 the comment was one of encouragement to develop a fix in the code base ;) This is my first project coding python and HA integrations so it can't be too difficult/complex... @lawrencemaroun if you've got any questions on the code just ask. If you haven't already downloaded a copy the best place to start understanding the integration is the official ocpp and HA developer documentation.

[dreimer1986]

@drc38 OK, then I understood it correctly before I started questioning if I interpreted it right :P I will not vanish, that for sure. Maybe I can send in some more things as soon as I understand more of the code and find something I would like to have or see.