Teslemetry users with a Tesla Powerwall get faster readings in Home Assistant 2026.11. Pull request #184808 by Brett Adams, merged on 15 October 2026, makes Home Assistant read a paired Powerwall's live values directly over the local network every 5 seconds, and its configuration every 30 seconds. The matching documentation change went into the next branch of the docs, the one prepared for the coming release, on 16 October.
What changes
In 2026.10, the Teslemetry documentation describes energy sites as cloud-polled: live status and site information every 30 seconds, energy history every 60 seconds. Local pairing already existed, but only for commands. Home Assistant sent them straight to the Powerwall and fell back to the cloud when that failed.
From 2026.11, a paired site also reads data from the gateway. The local live values (every 5 s) and the backup reserve and operation mode (every 30 s) are merged over the cloud values. When the gateway can't be reached, Home Assistant uses the cloud values instead. The 2026.11 documentation also says that live status, site information, tariffs and energy history now arrive through the Teslemetry data stream.
One detail matters for automations that change settings. After a successful command on a paired site, the new value is held until its source reports again. For settings the gateway owns, such as the backup reserve, that is the next successful gateway poll; for everything else, the next cloud update. A poll in between, or a failed one, can no longer flash the old value for a moment.
Not fully local
The cloud stays in the loop. Entity availability still follows the Teslemetry data stream, so faster local reads do not make the integration independent of Teslemetry's connection. The local readings are layered on top of the cloud data, and the cloud covers any gap when the gateway does not answer.
Pairing
Pairing is unchanged. It works with a Powerwall 2 or Powerwall 3 that is reachable on the local network:
- In Settings > Devices & services, open the Teslemetry integration and select Add local energy site.
- Choose the site with the Powerwall.
- Approve the local access key by switching the On/Off switch on the primary Powerwall off and back on. You only do this once.
- Confirm the discovered address and enter the Powerwall's Wi-Fi password. Only the last 5 characters are needed. They are on the QR label behind the front cover of a Powerwall 3, or behind the Backup Gateway door on a Powerwall 2.
Removing the integration does not revoke the access key from the Powerwall, so other apps that use the same key keep working.
A further pull request, #186730, would add local grid and site binary sensors. It was still open at the time of writing.