Hi,
There’s a battery level sensor already present. It shall be called sensor.brand_model_battery_voltage
See below:
Well, the accessories battery (12v) is automatically charged, yes, but when the vehicle is working or charging. If the vehicle is turned off, the 12v battery level can go very low and you may not be able to start the car. That’s why we need to limit the calls to the vehicle.
Cheers