Sunsynk Documentation

[Meatballs1]

I have the following modifications to predbat.py:

• Set SoC target% to an int
• Set power to current to round 0
• "support_charge_freeze": True,
• "support_discharge_freeze": True,
• "output_charge_control": "current",

I currently have the following configuration:

  load_today:
    - sensor.household_load_energy_today # Custom sensor as AC coupled
  import_today:
    - sensor.sunsynk_daily_grid_import
  export_today:
    - sensor.sunsynk_daily_grid_export
  pv_today:
    - sensor.solaredge_pv_generation_today # Solaredge PV inverter

  num_inverters: 1
  inverter_type: SK

  charge_start_service:
    service: select.select_option
    entity_id: "select.sunsynk_work_mode"
    option: "Limited to Home"
  charge_stop_service:
    service: select.select_option
    entity_id: "select.sunsynk_work_mode"
    option: "Limited to Home"
  discharge_start_service:
    service: select.select_option
    entity_id: "select.sunsynk_work_mode"
    option: "Selling First" 

  timed_charge_current:
    - number.sunsynk_battery_max_charge_current
  timed_discharge_current:
    - number.sunsynk_battery_max_discharge_current
  battery_voltage:
    - sensor.sunsynk_battery_voltage
  charge_limit:
    - number.sunsynk_set_soc_timezone1 # Needs an automation to set across all 6 timezones

  # Customer sensors to get the BMS charge/discharge limit, based on inverter size (5kW, BMS reported limit, and inverter set limit)
  # Does this need to be an input value?
  charge_rate:
     - sensor.max_battery_charge_rate # {{ [5000,[states('number.sunsynk_battery_max_charge_current')|int,states('sensor.sunsynk_battery_charge_bms_limit_current')|int]|min * states('sensor.sunsynk_battery_voltage')|float]|min }}
  discharge_rate:
     - sensor.max_battery_discharge_rate # {{ [5000,[states('number.sunsynk_battery_max_discharge_current')|int, states('sensor.sunsynk_battery_discharge_bms_limit_current')|int]|min * states('sensor.sunsynk_battery_voltage')|float]|min }}

 battery_rate_max: 5000
 inverter_limit:
   - 11000

  battery_power:
    - sensor.sunsynk_battery_output_power
  pv_power:
    - sensor.solaredge_ac_power
  load_power:
    - sensor.household_load # {{ states('sensor.sunsynk_grid_power')|float + states('sensor.solaredge_ac_power')|float + states('sensor.sunsynk_inverter_output_power')|float }}
  soc_kw:
    - sensor.sunsynk_battery_energy # {{ states('input_number.sunsynk_battery_size')|float * states('sensor.sunsynk_battery_soc')|float / 100 |float(0) }}
  soc_max:
    - input_number.sunsynk_battery_size # Set to 20.5kWh 
  battery_min_soc:
    - sensor.sunsynk_battery_min_soc # Could just be hardcoded? My shutdown is set to 20% {{ states('sensor.sunsynk_battery_capacity_shutdown')|int * states('input_number.sunsynk_battery_size')|float / 100 }}

Automation

alias: PredBat - Copy Charge Limit
description: ""
trigger:
  - platform: state
    entity_id:
      - number.sunsynk_set_soc_timezone1
    to: null
condition: []
action:
  - service: number.set_value
    data_template:
      entity_id:
        - number.sunsynk_set_soc_timezone2
        - number.sunsynk_set_soc_timezone3
        - number.sunsynk_set_soc_timezone4
        - number.sunsynk_set_soc_timezone5
        - number.sunsynk_set_soc_timezone6
      value: "{{ states('number.sunsynk_set_soc_timezone1')|int(20) }}"
mode: single

I dont have a charge curve, currently get the following:

2024-05-06 00:43:29.453000 INFO pred_bat: Find discharge curve with sensors sensor.sunsynk_battery_energy and sensor.predbat_SK_0_discharge_rate and predbat.status and sensor.sunsynk_battery_output_power
--
2024-05-06 00:43:29.441535 INFO pred_bat: Note: Can not find battery charge curve (missing history), one of the required settings for predbat_status, soc_kw, battery_power and charge_rate do not have history, check apps.yaml
2024-05-06 00:43:15.144601 INFO pred_bat: Find charge curve with sensors sensor.sunsynk_battery_energy and sensor.predbat_SK_0_charge_rate and predbat.status and sensor.sunsynk_battery_output_power

I think I have 7 days history in all of those, but maybe battery hasn't been topped up to 100% fully. Not sure if needed. Or maybe because my charge_rate is dynamic?

[Meatballs1]

Not sure if I need to set switch.predbat_inverter_soc_reset

[bensebborn]

I use automations for the controls.

Force charge:

• Change Work Mode to Zero export to CT

• Turn on Charge Point 6 Grid

• Turn on Use Timer

  Force discharge:

• Change Work Mode to Selling First

• Turn off Charge Point 6 Grid

• Turn on Use Timer

  Cancel charge/discharge:

  • Change Work Mode to Zero export to CT
  • Turn off Charge Point 6 Grid
  • Turn on Use Timer

[springfall2008]

Could someone have a go at writing the documentation paragraph to tell new users how to set this up?

Are any predbat.py changes pending or are they now all in the mainline?

[Meatballs1]

I've not been up and running for a while with the flurry of updates recently, then hit:

Not had time to look into it

[springfall2008]

I've not been up and running for a while with the flurry of updates recently, then hit:

![Screenshot_20240514-182734](https://private-user-images.githubusercontent.com/1854557/330535631-5c9c9614- time to look into it

I suspect this is fixed now?

[Meatballs1]

Yes, need to update for solcast now 😅

[jimleach]

I use automations for the controls.

Force charge:

• Change Work Mode to Zero export to CT
• Turn on Charge Point 6 Grid
• Turn on Use Timer

Force discharge:

• Change Work Mode to Selling First
• Turn off Charge Point 6 Grid
• Turn on Use Timer

Cancel charge/discharge:

* Change Work Mode to Zero export to CT
* Turn off Charge Point 6 Grid
* Turn on Use Timer

Well done on getting the Sunsynk to work - I managed to get the solar/battery data into PredBat but couldn't work out how to program the charge slots on the inverter.

Any chance you could post the automations up please?

[gcoan]

I'm happy to update the documentation with the sensors & any recommended automations