Includes a Python package soliscontrol which has modules for controlling a Solis inverter using the Solis Cloud API. This can be used to view key inverter parameters and to set daily charge times (within a cheap rate period) or discharge times (within a peak rate period). It will also check that times are synchronised with the inverter and that charge currents do not exceed the configured maxima.
The project also includes solis_flux_times a pyscript Home Assistant app specifically for use with the Octopus Flux tariff (for details see below).
Note this project is heavily based on solis_control which has the only details I could find for the v2 solis control API.
You should access the Solis Cloud API by following these
instructions.
Based on the values returned you will need to create a secrets.yaml - replace xxxx in the following example:
solis_key_id: "xxxx"
solis_key_secret: "xxxx"
solis_user_name: "xxxx"
solis_password: "xxxx"
solis_station_id: "xxxx"
On your inverter you will also need to enable Self Use mode and set Time of Use: Optimal Income to Run - see https://www.youtube.com/watch?v=h1A80cSOrhA
Put your secrets.yaml in the soliscontrol folder then edit main.yaml to suit - an example as follows:
battery_capacity: 7.1 # in kWh - nominal stored energy of battery at 100% SOC (eg 2 * Pylontech US3000C with Nominal Capacity of 3.55 kWh each)
battery_max_current: 74 # in amps (eg 2 * Pylontech US3000C with spec Recommend Charge Current of 37A each)
# Also see https://www.youtube.com/watch?v=h1A80cSOrhA to view battery Dis/Charging Current Limits
inverter_max_current: 62.5 # in amps - see inverter datasheet specs for 'Max. charge / discharge current' (eg 62.5A or 100A)
charge_period: # morning cheap period when energy can be imported from the grid at low rates
start: "02:05"
end: "04:55"
current: 50 # charge current setting in amps
discharge_period: # evening peak period when energy can be exported to the grid at high rates
start: "16:05"
end: "18:55"
current: 50 # discharge current setting in amps
#api_url: = 'https://www.soliscloud.com:13333' # default
Use the solis_control_req_mod.py module. The other modules in the package
(solis_control_req_class.py, solis_control_async_mod.py, solis_control_async_class.py)
are experimental. You should save your secrets.yaml in the same folder.
To get help:
python solis_control_req_mod.py -h
To get inverter status information:
python solis_control_req_mod.py
To set inverter charge and discharge times to one hour per day:
python solis_control_req_mod.py 60 60
The app sets inverter charge (and discharge) times daily just before the start of the Octopus Flux cheap and peak rate periods. It runs a defined number of minutes (cron_before) these periods. The duration of each charge or discharge episode takes into account the solar forecast and the current battery charge level.
You should work out the following values depending on your household usage:
-
morning_requirement is the target energy 'reserve' you want to have in place after your morning cheap rate. The 'reserve' consists of the predicted solar yield for the rest of the day and the battery energy stored after charging. Set this to zero if you don't want any charging to take place
-
evening_requirement is the target energy 'reserve' you want to have in place after your evening peak rate. The 'reserve' consists of the predicted solar yield for the rest of the day and the battery energy remaining after discharging. Set this to zero if you don't want any discharging to take place.
You should also monitor the accuracy of solar forecast values for your home (they can be adjusted using the forecast_uplift multiplication factor in the configuration below).
First install the Forecast.Solar integration.
Next copy solis_flux_times.py to the pyscript apps folder
and copy solis_common.py and solis_control_req_mod.py to the pyscript modules folder. Finally append
the contents of your secrets.yaml to the pyscript secrets.yaml.
Configuration is via the pyscript config.yaml - an example as follows:
allow_all_imports: true
hass_is_global: false
apps:
solis_flux_times:
forecast_remaining: 'energy_production_today_remaining' # entity id of solar forecast remaining energy today (kWh) - in 'sensor' domain
morning_requirement: 11 # target kWh level (solar predicted + battery stored) at morning charge period
# zero means morning charging will be actively turned off each day (use a negative number to disable any action in the morning)
evening_requirement: 4 # target kWh level (solar predicted + battery stored) at evening discharge period
# zero means evening discharging will be actively turned off each day (use a negative number to disable any action in the evening)
cron_before: 20 # minutes before start of periods below to set charging/discharging times
forecast_uplift: 1.0 # multiplication factor for forecast values if they prove to be pessimistic or optimistic
solis_control:
key_secret: !secret solis_key_secret
key_id: !secret solis_key_id
user_name: !secret solis_user_name
password: !secret solis_password
station_id: !secret solis_station_id
#api_url: = 'https://www.soliscloud.com:13333' # default
battery_capacity: 7.1 # in kWh - nominal stored energy of battery at 100% SOC (eg 2 * Pylontech US3000C with Nominal Capacity of 3.55 kWh each)
battery_max_current: 74 # in amps (eg 2 * Pylontech US3000C with Recommend Charge Current of 37A each)
# Also see https://www.youtube.com/watch?v=h1A80cSOrhA to view battery Dis/Charging Current Limits
inverter_max_current: 62.5 # in amps - see inverter datasheet specs for 'Max. charge / discharge current' (eg 62.5A or 100A)
charge_period: # Cheap period when energy can be imported from the grid at low rates
start: "02:05"
end: "04:55"
current: 50 # charge current setting in amps
discharge_period: # Peak period when energy can be exported to the grid at high rates
start: "16:05"
end: "18:55"
current: 50 # discharge current setting in amps
Look in the logs for entries tagged solis_flux_times. In the example the charge times will be set cron_before ie 20 mins before the start of the morning cheap rate period at 01:45 and the discharge times will be set cron_before ie 20 mins before the start of the peak evening rate period at 15:45.
There is also a test_solis pyscript service which allows you test different settings and view the results in the log (without taking any action).