Tesla Powerwall / Teslemetry configuration for predbat

[adrianrobertson1234-commits]

Firstly I am not a coder, I have attached my yaml and log. I am following instructions of edhull.co.uk guide. On the dashboard I get "Error: Exception raised 'NoneType' object has no attribute 'split'

Predbat v1.2.9. v8.25.6

AR_yaml.rtf

predbat-40.log

• Tesla 2x Powerwall 3
• Rasp Pi 5

[gcoan]

I'm not familiar with the edhull config of Predbat (and would have been useful if he'd contributed a PR to include it in the predbat documentation, but if we get yours working, I can do that)

It looks like you have mirrored his apps.yaml with the key bits. His has some bad yaml indentation which might cause problems, yours looks OK.

So can't see anything obviously wrong.

Have you tried in a HA script setting your battery to start and stop charging using the commands in the apps.yaml to confirm that you have that bit of the config and Tesla integration working?

BTW you want to set Predbat to 'control charge only' mode as you've not defined any export/discharge services

[springfall2008]

Try adding

has_ge_inverter_mode: False

To the inverter config

[Slee2112]

Thanks @springfall2008 that does the trick, it now works in charge only mode!

Side note on the topic of Telsa, and happy to open a feature request for this but is there a way to get the discharge to work too?
The idea being you inject the plan from predbat into tesla as a tarrif setting?

Really want to use predbat, but it doesnt export currently :(

[gcoan]

Side note on the topic of Telsa, and happy to open a feature request for this but is there a way to get the discharge to work too?

Glad you have got predbat charging your tesla powerwall OK now

The edhull configuration https://edhull.co.uk/blog/2025-08-24/predbat-docker-tesla only sets up battery charging

Battery exporting is entirely possible from predbat but you'd need to work out what the Tesla integration command options are to set discharge mode, etc.

You'd extend the configuration in apps.yaml with discharge_start_service and discharge_stop_service https://springfall2008.github.io/batpred/inverter-setup/#i-want-to-add-an-unsupported-inverter-to-predbat

You'll need to experiment and work out what these commands are as we don't have a Powerwall.

[Slee2112]

Thanks @gcoan

exporting with Powerwall is tricky, as there is no built in button as such to do it. you have to trick it with its tariff options.
I've made my own export button, that will trigger an export.
The discharge_start_service and discharge_stop_service, can these just call function in home assistant.

for example?
discharge_start_service:
service: button.press
entity_id: "my home assistant script"

[Slee2112]

Got it.... i think, just doing some testing. but its looking promising.

The below should work, but you do have to fudge the tarrif at the same time. hence the rest command to rest_command.powerwall_force_export_now

Below are the additions to the apps.YAML

discharge_start_service:
- service: rest_command.powerwall_force_export_now
- service: switch.turn_on
entity_id: switch.my_home_allow_charging_from_grid
- service: select.select_option
entity_id: "select.my_home_allow_export"
option: "battery_ok"
- service: select.select_option
entity_id: select.my_home_operation_mode
option: "autonomous"
discharge_stop_service:
- service: rest_command.powerwall_api_set_iog_custom_tariff
- service: select.select_option
entity_id: select.my_home_operation_mode
option: "self_consumption"
- service: select.select_option
entity_id: "select.my_home_allow_export"
option: "never"

And below is the rest_command.powerwall_force_export_now
rest_command:
powerwall_force_export_now:
url: "https://owner-api.teslamotors.com/api/1/energy_sites/123456789123456789/time_of_use_settings"
method: POST
headers:
Authorization: !secret tesla_auth_token
Content-Type: application/json
payload: >
{% set now = now() %}
{% set minute = now.minute %}
{% set start = now.replace(minute=0) if minute < 60 else now.replace(minute=60) %}
{% set end = start + timedelta(minutes=60) %}
{
"tou_settings": {
"tariff_content_v2": {
"version": 1,
"utility": "Octopus Energy",
"code": "OCTO-IOG-CUSTOM",
"name": "Octopus IOG (Force Export Now)",
"currency": "GBP",
"monthly_minimum_bill": 0,
"min_applicable_demand": 0,
"max_applicable_demand": 0,
"monthly_charges": 0,
"daily_charges": [
{ "name": "Charge", "amount": 0 }
],
"daily_demand_charges": {},
"demand_charges": {
"ALL": { "rates": { "ALL": 0 } },
"AllYear": { "rates": {} }
},
"energy_charges": {
"ALL": { "rates": { "ALL": 0 } },
"AllYear": {
"rates": {
"SUPER_OFF_PEAK": 0.07,
"ON_PEAK": 0.31
}
}
},
"seasons": {
"AllYear": {
"fromMonth": 1,
"fromDay": 1,
"toMonth": 12,
"toDay": 31,
"tou_periods": {
"SUPER_OFF_PEAK": {
"periods": [
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": 0, "fromMinute": 0, "toHour": {{ start.hour }}, "toMinute": {{ start.minute }} },
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": {{ end.hour }}, "fromMinute": {{ end.minute }}, "toHour": 0, "toMinute": 0 }
]
},
"ON_PEAK": {
"periods": [
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": {{ start.hour }}, "fromMinute": {{ start.minute }}, "toHour": {{ end.hour }}, "toMinute": {{ end.minute }} }
]
}
}
}
},
"sell_tariff": {
"min_applicable_demand": 0,
"max_applicable_demand": 0,
"monthly_minimum_bill": 0,
"monthly_charges": 0,
"utility": "Octopus Energy",
"daily_charges": [
{ "name": "Charge", "amount": 0 }
],
"demand_charges": {
"ALL": { "rates": { "ALL": 0 } },
"AllYear": { "rates": {} }
},
"energy_charges": {
"ALL": { "rates": { "ALL": 0 } },
"AllYear": {
"rates": {
"SUPER_OFF_PEAK": 0.07,
"ON_PEAK": 0.30
}
}
},
"seasons": {
"AllYear": {
"fromMonth": 1,
"fromDay": 1,
"toMonth": 12,
"toDay": 31,
"tou_periods": {
"SUPER_OFF_PEAK": {
"periods": [
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": 0, "fromMinute": 0, "toHour": {{ start.hour }}, "toMinute": {{ start.minute }} },
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": {{ end.hour }}, "fromMinute": {{ end.minute }}, "toHour": 0, "toMinute": 0 }
]
},
"ON_PEAK": {
"periods": [
{ "fromDayOfWeek": 0, "toDayOfWeek": 6, "fromHour": {{ start.hour }}, "fromMinute": {{ start.minute }}, "toHour": {{ end.hour }}, "toMinute": {{ end.minute }} }
]
}
}
}
}
}
}
}
}

[gcoan]

great, sounds promising, yes predbat should be able to invoke any HA service function as you have found

when you're happy with the solution, can you repost the apps.yaml and rest setup (presumably in configuration.yaml) with the code preceded and followed by three backwards quotes ``` so the formatting stays good

I assume there is also a rest_command.powerwall_api_set_iog_custom_tariff to set the tariff back to normal?

the /123456789123456789/ in the URL is your unique powerwall serial number (or similar)?

and tesla_auth_token needs to be defined in secrets.yaml?

[Slee2112]

Largely its working.
Few quirks, not sure if its intended, but it looks like it calls a stop charging command before issue a start discharging commands, and depending on the sequence these come in, it can cause the "wrong" thing to happen. Looks like a similar setup to the sigenstore where it just toggles between the modes. If you leave it to sort itself out, if it did initally select the wrong one, it does sort itself within a few minutes .

Is it meant to turn one off to enable the other? If it is, ill have to make sure they dont clash

the configs ill paste into a separate message after this one.

For now there are the 2 rest commands, the important one to trick it into exporting, and then the otherone to set it back to normal.
I do have a powershell script that gets the current value, saves it and can then revert to it, but couldnt get that working inside HA just yet. so for now i just statically set back to IOG

The /123456789123456789/ refers to your tesla Site ID, and is unique to each persons account.

And yes the tesla auth token is in secrets.yaml.

Ill try and put some basic steps together incase people want to try and follow along.