I have seen a few other attempts at this but have not been satisfied with the solutions I have seen or tried. I wanted to take a stab at making my own here and wanted to share my progress.
I have the Tesla Powerwall (I have Tesla Solar and a Powerwall) and Wall Charger integrations. I also have the HACS Tesla integration, but have not used anything from there (yet)
I have the first half of the automation down regarding the trigger and condition. See below:
trigger:
platform: numeric_state
entity_id: sensor.apf_generation_entity
above: 0
condition:
- type: is_plugged_in
condition: device
device_id: <s>OMITTED</s>
entity_id: binary_sensor.tesla_wall_connector_vehicle_connected
domain: binary_sensor
- condition: numeric_state
entity_id: sensor.tesla_model_3_battery_level
below: 80
As you can see, the trigger is a simple “is there excess energy” inquiry. I created that in my template.yaml page:
- name: APF Generation Entity
device_class: power
state_class: measurement
unit_of_measurement: W
state: "{{ (states('sensor.powerwall_solar_now')|float(0)*1000)|int(0) }}"
The two conditions I have checked are to see if the wall connector is connected to a Tesla and whether that car’s battery is below 80% charge.
Here is where things get… hard. The trigger portion I have been having issues with and I have based it on a few implimations of other people’s work. It also happens to be where I am losing my mind.
action:
- service: switch.turn_on
entity_id: switch.tesla_wall_connector_switch
data:
current: '{% set max_charging_current = states(''input_number.tesla_charging_current'')
| int %} {% set excess_power = states(''sensor.apf_generation_entity'') |
float - max_charging_current %} {{ max_charging_current if excess_power <
0 else states(''sensor.apf_generation_entity'') | float }}
I am having an issue because I’m trying to get the code to dynamically update the amps delivered based on the excess solar being producted. This should take on values between 0 amps (no charging and no excess) and 48 amps (max, balls-to-the-wall charge speed).
The sun has gone down at this stage, and I am tired. I was hoping to hear what other people’s thoughts are. I want to complete an automation and share it with others for their benefit.
