Hey,
I think the Tesla Wall Connector device/service is missing a function from it’s definition. Within your Tesla Wall Connector you can set charging times and to override these defined times you need to press the “Start Charging” button within the Tesla app specifically for the Tesla Wall Connector NOT the car. Doing so on the car will cause a failure. Right now there is only the option within Home Assistant to try charging via the car (from what I can see) and not within the Tesla Wall Connector device/service. Could this be added?
Many Thanks