aiopowerwall

An async Tesla Powerwall 3 client built on aiohttp, written for Home Assistant and any other asyncio code.

This library speaks the Powerwall's TEDAPI v1r protocol — RSA-signed protobuf messages over the wired LAN to 192.168.91.1. It is intentionally scoped to:

• Powerwall 3 only
• Local LAN access only (no cloud telemetry)
• Read + control commands (status, config, firmware, components, max-backup)

The RSA key pair used for v1r authentication must be registered with the gateway out-of-band, typically via the Tesla Fleet API. This library consumes an already-paired private key — it does not implement registration.

Install

pip install aiopowerwall

Quick start

import asyncio
from pathlib import Path
from aiopowerwall import PowerwallClient

async def main() -> None:
    pem = Path("tedapi_rsa_private.pem").read_bytes()
    async with PowerwallClient(
        host="192.168.91.1",
        gateway_password="<gateway-password>",
        rsa_private_key_pem=pem,
    ) as pw:
        await pw.connect()
        print("DIN:", pw.din)
        print("Battery SoC:", await pw.get_battery_soe(), "%")
        print("Grid:", await pw.get_grid_status())
        print("Power:", await pw.current_power())

asyncio.run(main())

API surface

Method	Returns
connect()	DIN string
get_din()	DIN string
get_config()	config.json (dict)
get_status()	DeviceController query (narrow)
get_device_controller()	DeviceController query (extended)
get_components()	Powerwall 3 component data
get_firmware_version(details=...)	Version string or details dict
get_meters_aggregates()	/api/meters/aggregates
get_battery_soe()	Battery SoC percentage
get_grid_status()	Grid status string
battery_level()	SoC computed from status payload
current_power(location=...)	Real power per meter aggregate
backup_time_remaining()	Hours of backup at current load
write_config(updates)	Patch config.json (dotted paths)
schedule_max_backup(seconds)	Schedule manual backup event
cancel_max_backup()	Cancel manual backup event
get_backup_events()	Active and scheduled backup events

All read methods cache responses with a configurable TTL (cache_status_ttl, cache_config_ttl); pass force=True to refresh.

Exceptions

All errors are subclasses of PowerwallError:

• PowerwallConnectionError — transport failure / timeout
• PowerwallAuthenticationError — bad password or unregistered RSA key
• PowerwallRateLimitError — gateway returned 429/503
• PowerwallFaultError — signed-message fault (key inactive, expired, etc.)
• PowerwallProtocolError — malformed response

Acknowledgements

This project builds on the protocol research and reference implementation in pypowerwall by Jason Cox, distributed under the MIT License. Huge thanks to Jason and the pypowerwall contributors for reverse-engineering and documenting the TEDAPI protocol.

License

MIT (see LICENSE). Original pypowerwall copyright and license notice are retained in LICENSE.