Feature Request: Max Backup Option for Tesla Powerwall

[B-Hartley]

Hi,

Over the last month or so I've been having problems getting my powerwall to behave how I want it to.
Using Home Assistant Tesla Fleet integration.

Overnight on cheap rate, I want the battery to be charged to 100% (or 99% if that's what Tesla allow!)
It doesn't always seem to respond to the mode changes as I would expect.

I've noticed there is now a "max backup" option in the Tesla App that is activated if you ask it to go to a 100% Backup Reserve and confirm it's what you want.

This then activates a "max backup" mode with a timer that charges up to 100% from grid.

Can this mode be activated through this API ?
Could it be added?

Thanks,
Bruce.

[Bre77]

As far as I know there is no Fleet API option for this (https://developer.tesla.com/docs/fleet-api/endpoints/energy), however I need to do some reverse engineering to understand what the Tesla app is doing. The backup API endpoint should still allow 100%, however it will NOT allow 81-99% for whatever reason.

[B-Hartley]

what do you mean it won't allow 80-99% ?
I set operation mode to "backup" and reserve to "99" and it seems ok, or am i misunderstanding you ?

[Bre77]

When you set your operation mode to backup, that's similar to setting the backup reserve to 100%. When your operation mode is something else, I believe the backup reserve can only be set to 0-80 or 100%.

[B-Hartley]

Interesting. Thanks.