Any Possibility of Scheduled Charging to Top Up to Minimum SOC

[changyang1230]

I am not home very often during the day, when I am home I take the opportunity to do as much solar-excess charging as possible using the amazing EVCC. My normal target is 80% as per Tesla recommendation for my Model 3 LR battery.

However, on days that I am not home, I will let the battery slowly run down over the week, and try to top it up to as much as 35% overnight. (so that I have safe amount of battery left each morning, but allow the car battery some free space to take in solar excess when the opportunity arises!)

I have off-peak tariff which only starts from 2100 to 0700 the next morning, so naturally I would only want to charge at these hours.

Now I am not sure if there's a way for me to set EVCC to do all of the following automatically:

• scheduled charging only from 2100 to 0700
• if the SOC is less than 35%, then fast charge up to 35%.
• otherwise, when the car is plugged in during the day, use solar excess to charge the car, up to the 80% limit.

When we first set up the evcc.yaml, the minimum SOC was set as 35%, as below:

vehicles:
- type: template
  template: tesla
  title: Model 3 LR
  accessToken: SECRET
  refreshToken: SECRET
  vin: SECRET
  capacity: 77.8
  phases: 1
  icon: car
  mode: pv
  minSoc: 35
  targetSoc: 80
  minCurrent: 5
  maxCurrent: 32
  name: ev4

However, as far as I can recall, the standard behaviour would be that if the car is connected and the SOC is below the minimum SOC, it will automatically charge to this minSOC immediately. If I plug in the car at 1900 which is still peak tariff period, this behaviour is obviously undesirable!

At the moment, if I want to achieve all of the above, I would have to change the car after 2100, and change the limit to 35%, and then choose "fast"; and when I am done, I will have to manually change the mode to "solar" again.

Am I right in saying that this is the only way I could achieve my requirement in EVCC? Just want to double check that I haven't missed some other smart configuration that I could use to achieve this objective. Thanks again for this piece of fantastic open source software!

[VolkerK62]

Your tariffs are configured in the yaml? Then you can use smartCostLimit. https://docs.evcc.io/en/docs/reference/configuration/site/#smartcostlimit-ehemals-cheap

[changyang1230]

Thank - would this charge to the 80% limit or the 35% minSOC?

[VolkerK62]

until 80% or whatever you set as target.
minsoc is the absolute minimum soc, which should be reached as fast as possible. Due to that the charging starts im immediately with max power.

[changyang1230]

Thanks a lot for the reply - the question is: if I want to limit this "grid charging" to only 35%, and only charge to 80% as the target only when it's solar excess charging, the only way I could do it is to manually change it each time, is that right?

[MrBLJ]

Thanks a lot for the reply - the question is: if I want to limit this "grid charging" to only 35%, and only charge to 80% as the target only when it's solar excess charging, the only way I could do it is to manually change it each time, is that right?

Sorry to unearth this old post : i'm in the exact same case as yours, did you find any solution to this ?

[changyang1230]

Hi @MrBLJ , I no longer use EVCC as they stopped supporting Tesla for the free version (requires sponsorship). As far as I know there's no such setting by the time I stopped using it a few months ago. Maybe someone who's great at writing YAML could set it up somehow, but this is beyond my very limited scripting ability.