Hi,
I’m new here, so I’m sorry for any mistakes I may have made. Anyway, I’m writing this to share my automation for load balancing my EVSE. This is because in my searches I failed to find what I wanted and I think others may have searched for the things I’m about to describe. The whole EVSE load balancing control is designed to support three modes given a PV system:
-
Manual Mode - the user controls the setting for the charging current and the vehicle charges at the specified rate regardless of the solar production power
-
Hybrid Mode - the automation controls the charging current based on the solar production, however a (dynamically configurable) level of power (instant energy) is allowed to be drawn from the grid.
-
Solar Mode - the automation controls the charging current based on the solar production and charges based on solar power excess. In addition if the minimum level of solar power excess is not meet the automation automatically stops the charging or if the minimum level is meet the automation automatically starts the charging.
Requirements:
-
a EVSE integration that exposes entities for starting and stopping the charging, controlling the charging current, has state sensor indicating (at least) if the charger has started or not, and a sensor for the power drawn by the EVSE (I’m using the Lektrico 1p7k, but you can use for example an Wallbox one).
-
a PV System or an independent Power Meter that exposes an entity for power import / export. In my case this an entity indicating positive W value for import and a negative W value for export.
-
You need to create a counter helper that has the minimum, maximum and step size exactly as your EVSE current control allows you to set. The automation will use this counter to increment/decrement and set the numeric state of the EVSE current control entity. In my case I the minimum current setting is 6A, the maximum setting is 32A and the step size is 1A. I also set the initial counter value to the minimum setting of 6A.
-
You need to create an Dropdown (input_select) helper for the charging modes and configure it to have 3 options: Manual, Hybrid and Solar. This will be used to switch between the 3 different charging modes.
-
You also need to create Number (input_number) helper and configure it to have minimum and maximum EVSE supported charging power. This will be used to dynamically configure the Hybrid Mode allowed grid drawn power. In my case, the EVSE minimum is 1.4 kW, while for the maximum I opted to go with half the EVSE capability, which is 3.6 kW. Also, in my case a step size of 0.25 seems to work the best and you may have to adjust it a little bit.
-
Also note that all these charging power levels are supported by my EV and you should take care not to exceed any of them.
The automation:
The automation can be improved in many ways, but it does the job great for me. To work for you need (at least) change the entities to the ones you have available in your HA (I think the easiest way here would be to create a new automation, paste in the yaml and then edit through the UI).
My Automation Entities:
-
sensor.1p7k_state- this is the state of my charger of which in the automation I use “Charging” (indicates that the charger is on), and “Connected,NeedAuth” (indicates that the charger is connected to the car but its stopped). (its exported by my charger integration) -
number.1p7k_user_limit- this is the current in amps control for my charger which I can vary between 6A and 32A (its exported by my charger integration) -
sensor.home_meter_total_active_power- this is the my house active power consumption which is negative when exporting power and positive when importing power (its exported by my meter integration) -
button.1p7k_charge_start- this is a button through which I can command the charger to start charging (its exported by my charger integration) -
button.1p7k_charge_stop- this is a button through which I can command the charger to stop charging (its exported by my charger integration) -
input_select.1p7k_charging_mode- this is a drop down helper with 3 states Manual, Hybrid and Solar indicating in the modes that can be set for the charger (Hybrid and Solar are the ones controlled through the automation). -
counter.1p7k_user_limit_auto_counter- this is a counter helper used to set thenumber.1p7k_user_limitas the number entities do not have increment and decrement service calls -
input_number.1p7k_hybrid_charging_limit- this is the helper through which the hybrid mode dynamic limit is set. That is, when in hybrid mode through this I set the maximum power that can still be drawn from the grid if the PV doesn’t produce sufficient power.
First version:
- id: '1704386812345'
alias: Your name for the automation goes here
description: ''
trigger:
- platform: state
entity_id:
- sensor.1p7k_state # change this to your EVSE state sensor
to: Charging # change this to the started state value of your EVSE
- platform: state
entity_id:
- sensor.1p7k_state # change this to your EVSE state sensor
to: Connected,NeedAuth # change this to the stopped state value of your EVSE
- platform: state
entity_id:
- input_select.1p7k_charging_mode # change this to your Dropdown helper
to: Solar
- platform: state
entity_id:
- input_select.1p7k_charging_mode # change this to your Dropdown helper
to: Hybrid
- platform: state
entity_id:
- number.1p7k_user_limit # change this to your EVSE current configuration entity
enabled: false
- platform: state
entity_id:
- input_number.1p7k_hybrid_charging_limit # change this to Number helper for the dynamic limit in hybrid mode
condition:
- condition: or
conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Hybrid
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: or
conditions:
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Connected,NeedAuth # change this to the stopped state value of your EVSE
action:
- repeat:
sequence:
- choose:
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: state
entity_id: sensor.1p7k_state # change this to your Dropdown helper
state: Charging # change this to the started state value of your EVSE
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
above: 6
below: 32
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
above: 6
below: 32
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
below: -250 # you can play arround with this limit
enabled: true
sequence:
- service: counter.increment
target:
entity_id:
- counter.1p7k_user_limit_auto_counter # change this to the Counter helper
data: {}
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
above: 6
below: 32
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
above: 6
below: 32
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
above: 50
sequence:
- service: counter.decrement
target:
entity_id:
- counter.1p7k_user_limit_auto_counter # change this to the Counter helper
data: {}
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
above: 5
below: 26
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
above: 6
below: 25
enabled: false
- condition: or
conditions:
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
below: -250
enabled: true
- condition: template
value_template: '{{ (states(''sensor.1p7k_power'')|float | float) <
(states(''input_number.1p7k_hybrid_charging_limit'')| float - 0.2|float)}}' # replace the entities accordingly
sequence:
- service: counter.increment
target:
entity_id:
- counter.1p7k_user_limit_auto_counter # change this to the Counter helper
data: {}
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
above: 5
below: 26
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
above: 6
below: 25
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
above: 50
- condition: template
value_template: '{{ (states(''sensor.1p7k_power'')|float|float) > (states(''input_number.1p7k_hybrid_charging_limit'')|float
+ 0.1 |float) }}' # replace the entities accordingly
sequence:
- service: counter.decrement
target:
entity_id:
- counter.1p7k_user_limit_auto_counter # change this to the Counter helper
data: {}
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Connected,NeedAuth # change this to the stopped state value of your EVSE
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_start # change this to your EVSE state sensor
- delay:
hours: 0
minutes: 0
seconds: 30
milliseconds: 0
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Connected,NeedAuth # change this to the stopped state value of your EVSE
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
below: -1400
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_start # replace this with your entity to start the EVSE charging
- delay:
hours: 0
minutes: 0
seconds: 30
milliseconds: 0
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power # change this to the entity indicating grid import or solar export of power
above: 300
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter # change this to the Counter helper
- service: number.set_value
metadata: {}
data:
value: '{{ states(''counter.1p7k_user_limit_auto_counter'') }}' # change this to the Counter helper
target:
entity_id: number.1p7k_user_limit # change this to your EVSE current configuration entity
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_stop # replace this with the entity to stop the EVSE charging
- delay:
hours: 0
minutes: 0
seconds: 10
milliseconds: 0
while:
- condition: or
conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Hybrid
- condition: state
entity_id: input_select.1p7k_charging_mode # change this to your Dropdown helper
state: Solar
- condition: or
conditions:
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Charging # change this to the started state value of your EVSE
- condition: state
entity_id: sensor.1p7k_state # change this to your EVSE state sensor
state: Connected,NeedAuth # change this to the stopped state value of your EVSE
enabled: true
mode: single
Update (tweaked version):
alias: 1P7K Charging Hybrid Solar Control
description: Controls the Hybrid and Solar Modes of the 1P7K EVSE
trigger:
- platform: state
entity_id:
- sensor.1p7k_state
to: Charging
- platform: state
entity_id:
- sensor.1p7k_state
to: Connected,NeedAuth
- platform: state
entity_id:
- input_select.1p7k_charging_mode
to: Solar
- platform: state
entity_id:
- input_select.1p7k_charging_mode
to: Hybrid
- platform: state
entity_id:
- number.1p7k_user_limit
enabled: false
- platform: state
entity_id:
- input_number.1p7k_hybrid_charging_limit
- platform: state
entity_id:
- sensor.inverter_active_power
condition:
- condition: or
conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Hybrid
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: or
conditions:
- condition: state
entity_id: sensor.1p7k_state
state: Charging
- condition: state
entity_id: sensor.1p7k_state
state: Connected,NeedAuth
action:
- repeat:
sequence:
- choose:
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: state
entity_id: sensor.1p7k_state
state: Charging
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit
above: 5
below: 25
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter
above: 6
below: 25
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
below: -250
enabled: true
sequence:
- service: counter.increment
target:
entity_id:
- counter.1p7k_user_limit_auto_counter
data: {}
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: state
entity_id: sensor.1p7k_state
state: Charging
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit
above: 6
below: 26
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter
above: 6
below: 25
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
above: 50
sequence:
- service: counter.decrement
target:
entity_id:
- counter.1p7k_user_limit_auto_counter
data: {}
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state
state: Charging
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit
above: 5
below: 25
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter
above: 6
below: 25
enabled: false
- condition: or
conditions:
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
below: -250
enabled: true
- condition: template
value_template: >-
{{ (states('sensor.1p7k_power')|float | float) <
(states('input_number.1p7k_hybrid_charging_limit')|
float - 0.2|float)}}
sequence:
- service: counter.increment
target:
entity_id:
- counter.1p7k_user_limit_auto_counter
data: {}
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state
state: Charging
enabled: true
- condition: numeric_state
entity_id: number.1p7k_user_limit
above: 6
below: 26
- condition: numeric_state
entity_id: counter.1p7k_user_limit_auto_counter
above: 6
below: 25
enabled: false
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
above: 50
- condition: template
value_template: >-
{{ (states('sensor.1p7k_power')|float|float) >
(states('input_number.1p7k_hybrid_charging_limit')|float +
0.1 |float) }}
sequence:
- service: counter.decrement
target:
entity_id:
- counter.1p7k_user_limit_auto_counter
data: {}
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Hybrid
- condition: state
entity_id: sensor.1p7k_state
state: Connected,NeedAuth
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_start
- delay:
hours: 0
minutes: 0
seconds: 30
milliseconds: 0
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: state
entity_id: sensor.1p7k_state
state: Connected,NeedAuth
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
below: -1400
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_start
- delay:
hours: 0
minutes: 0
seconds: 30
milliseconds: 0
- conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: state
entity_id: sensor.1p7k_state
state: Charging
- condition: numeric_state
entity_id: sensor.home_meter_total_active_power
above: 500
- condition: state
entity_id: number.1p7k_user_limit
state: "6"
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.1p7k_user_limit_auto_counter
- service: number.set_value
metadata: {}
data:
value: "{{ states('counter.1p7k_user_limit_auto_counter') }}"
target:
entity_id: number.1p7k_user_limit
- service: button.press
metadata: {}
data: {}
target:
entity_id: button.1p7k_charge_stop
- delay:
hours: 0
minutes: 0
seconds: 10
milliseconds: 0
while:
- condition: or
conditions:
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Hybrid
- condition: state
entity_id: input_select.1p7k_charging_mode
state: Solar
- condition: or
conditions:
- condition: state
entity_id: sensor.1p7k_state
state: Charging
- condition: state
entity_id: sensor.1p7k_state
state: Connected,NeedAuth
enabled: true
mode: single
After the automation is configured to your liking you can use your favorite UI cards to import the Dropdown entity and Number entity for the dynamic limit.