Hey everyone. I have been trying hard to get this automation going but keep running down a rabbit hole and getting lost. Here is what I am trying to do:
I have a solar setup with home batteries, an EV charger, and a EV vehicle. My goal is to setup automation that will look at the state of charge of my home batteries. If they hit 99% then I want the ev charger to turn on (this part was easy). Once it starts charging I want to first set the charge current to be 6. Then after a minute I want it to read my home batteries power. If the battery power is 0 or above that means it is not dischargingā¦it is either idle or charging. So I want it to increment from 6 to 10.
The idea here is that I have excess solar to use. Before you ask I know there are many automations for excess solar but everything I have found appears to be based on grid sell back. I do not have this on for my inverter so instead I figured the next best thing to determine if I have excess solar is to look at my battery power. If the batteries are charged to 100% then all that excess solar is lost. So as you can see I prioritize charging my house batteries then want to send anything else to my EV.
So I started to write the code for this and cannot for the life of me get it to work. As of right now it will run, set the initial ev charge current to 6 then it will bump it up by 4 to reach 10. After that it waits and checks the battery power again. But instead of going from 10 to 14 it reads as 6 and increments to 10. I also see this error in the trace:
Stopped because an error was encountered at January 2, 2025 at 1:48:16 PM (runtime: 16.23 seconds)
Error rendering data template: UndefinedError: ācurrent_current_stateā is undefined
Any help would be appreciated. Here is my code so far:
alias: Debugging EV Charger Automation - Streamlined
description: >-
Enable the EV charger when the car is connected and Battery SOC is 100%;
adjust charger current to keep Battery Power between -1000 and 1000
triggers:
- entity_id: binary_sensor.car_connected
to: "on" # Trigger when the car is connected
trigger: state
- minutes: /2 # Trigger every 2 minutes
trigger: time_pattern
conditions:
- condition: state
entity_id: binary_sensor.car_connected
state: "on" # Only run if the car is connected
- condition: numeric_state
entity_id: sensor.luxpower_lxp_battery_state_of_charge
above: 99 # Only run if the battery SOC is above 99%
actions:
- choose:
- conditions:
- condition: state
entity_id: switch.evse
state: "off" # If the charger is off
sequence:
- data:
message: Starting charger and setting initial charge current to 6
action: notify.mobile_app_myphone # Notify about starting the charger
- entity_id: switch.evse
action: switch.turn_on # Turn on the charger
- delay: "00:00:10" # Wait for 10 seconds
- data:
current: 6
target:
entity_id: switch.evse
action: emporia_vue.set_charger_current # Set the initial charge current to 6
- service: input_number.set_value
data:
entity_id: input_number.ev_charging_current
value: 6 # Store the initial charging current in input_number
- choose:
- conditions:
- condition: state
entity_id: switch.evse
state: "on" # If the charger is on
sequence:
- choose:
- conditions:
- condition: numeric_state
entity_id: sensor.luxpower_lxp_battery_power
above: 1000 # If the battery power is above 1000
sequence:
- delay: "00:00:05" # Wait for 5 seconds
- data:
message: >
Increasing charge current by 4. Current Battery SOC: {{ states('sensor.luxpower_lxp_battery_state_of_charge') }}%
action: notify.mobile_app_myphone # Notify about increasing the charge current and report battery SOC
- data_template:
current: >
{% set current_current_state = states('input_number.ev_charging_current') %}
{{ [current_current_state | int + 4, 48] | min }}
target:
entity_id: switch.evse
action: emporia_vue.set_charger_current # Increase the charge current
- data_template:
message: >
New charging current: {{ [current_current_state | int + 4, 48] | min }}. Battery SOC: {{ states('sensor.luxpower_lxp_battery_state_of_charge') }}%
action: notify.mobile_app_myphone # Notify about the new charging current and report battery SOC
- service: input_number.set_value
data_template:
entity_id: input_number.ev_charging_current
value: >
{{ [current_current_state | int + 4, 48] | min }} # Update the input_number with the new current
- conditions:
- condition: numeric_state
entity_id: sensor.luxpower_lxp_battery_power
below: -1000 # If the battery power is below -1000
sequence:
- delay: "00:00:05" # Wait for 5 seconds
- data:
message: >
Decreasing charge current by 4. Current Battery SOC: {{ states('sensor.luxpower_lxp_battery_state_of_charge') }}%
action: notify.mobile_app_myphone # Notify about decreasing the charge current and report battery SOC
- data_template:
current: >
{% set current_current_state = states('input_number.ev_charging_current') %}
{{ [current_current_state | int - 4, 6] | max }}
target:
entity_id: switch.evse
action: emporia_vue.set_charger_current # Decrease the charge current
- data_template:
message: >
New charging current: {{ [current_current_state | int - 4, 6] | max }}. Battery SOC: {{ states('sensor.luxpower_lxp_battery_state_of_charge') }}%
action: notify.mobile_app_myphone # Notify about the new charging current and report battery SOC
- service: input_number.set_value
data_template:
entity_id: input_number.ev_charging_current
value: >
{{ [current_current_state | int - 4, 6] | max }} # Update the input_number with the new current
mode: single
