Tesla Update has changed Powerwall behaviour so it no longer works

[Gerynant24]

Is there an existing issue for this?

• I have searched both the existing open issues & recently closed issues and did not find a duplicate of this issue.

Version of the Tesla component

3.25.5

Version of the Powerwall Gateway software

26.2.0.87adb89e

Model

2

Current Behavior

Prior to the update I could force my Powerwall to charge by setting the backup level to 100% and the mode to Timed. To stop it again, I could set the value to 0% and the mode back to Self-Powered.

After the update, when HA send the commands to set these modes, the Tesla app reflects the change, but the Powerwall seems to ignore it entirely. This means that when I get a signal for an Off-Peak rate from Octopus, I can no longer set the Powerwall to charge during the cheap rate period. The same seems to happen in the morning when cancelling the overnight 100% backup I set. The Tesla app shows the change, but the Powerwall keeps on charging. After the adjustment fails, even changing the settings on the Tesla app don't seem to work. I have resorted to going Off-Grid to get it to discharge.

Example, last night HA set the values to 100% at 23:30. However Powerwall did nothing until 3:30am. In fact it allowed the battery to drain completely despite being on the cheap rate.

I have tried various experiments from HA to make things happen immediately as they did prior to the update, but to no avail. Powerwall just seems to be completely ignoring the changes HA makes now.

Not sure if anyone else is seeing this yet, I think my PW was updated on Thursday last week,

Expected Behavior

What I expected to happen was when I set 100% the Powerwall charges and when I set 0% the Powerwall discharges,

I really hope there is another way to achieve control. Tesla seems to have introduced a new "Backup now" timed mode that requires confirmation when you select 100%. This may be contributing to the issue. You now cannot select a charge rate between 80% and 100% either.

Please let me know if I'm doing something wrong and there is a better way? This method of controlling the Backup percentage has worked flawlessly for almost 2 years, but now my automation is in tatters and my bills set to rise

home-assistant_tesla_custom_2026-02-10T19-47-19.461Z.log

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Debug logs

Log file is attached.

Anything else?

I don't know what logs will help as the Tesla app is showing what HA tells it to do, just the Powerwall is not responding, but happy to provide if you let me know what is required.

[skipishere]

I just checked mine and I'm still on v25 and it's still working as expected.
One thing I have noticed is you can now link up your tariff with the power wall (I just did it with mine) so interesting to see if we might see native Tesla automations soon?

[vger74656a]

Mine is also not working. I've uploaded a screenshot to assist. If you need anything else let me know.

[DiaryofaCatman]

So I believe I have the same problem, for the past two nights whilst the integration has set my backup charge to 100% and this seems to be set on my Powerwall - no charging takes place - despite the Grid charging setting also being active.
Previously my automations would charge the Powerwall, so I'm assuming a change on the Tesla side here.

One thing I've noticed is that in the Powerwall app there is now a confirmation dialogue when you request a 100% backup charge level, see below:

Is there a way that requests to charge to 100% could also validate this confirmation dialogue?

To add more details:
I have a Powerwall 2
Current Powerwall Firmware: 25.42.1 1d1ff4c6
Tesla Custom Integration Version 3.25.5

[skipishere]

@DiaryofaCatman that popup has been in the app for a while now (think I noticed late last year) and from my previous testing doesn't seem to interfere with charging. If you can get it working for non-100% (or test again and see if it was a one off blip) might be worth raising as a separate issue?

[Gerynant24]

Tesla support has stated that 26.2 now puts a delay on the backup reserve command. If you are in timed mode and you make a change to the backup setting, apparently this setting is now not changed until the cheap rate schedule kicks in. So if you change the setting at say 3pm, on Octopus Intelligent the change won’t actually happen until 11:30pm when the OffPeak schedule starts. Apparently this was added to prevent accidental charging on peak. I’ve tested this manually with the Tesla app and if you set Self powered first, you can force the charge. The downside is that you can only charge at 3.5kW.
My problem is that whenever I try to make a change using HA, it seems to mess up the app operation as well and I have to wait for hours before I can use the app again. I’m hoping that the integration can find a way as otherwise my only way forward is using HA to create an alert and then setting the PW manually via the Tesla app. Not ideal :-(

[DiaryofaCatman]

I think for me - it might have been that I had recently used the function to link your energy supplier function in the Powerwall app.

This afternoon I removed that data by setting a custom rate plan with 0p for all times on both import and export.

I can now force a backup to 100% and it starts a Grid Charge, so I will check to see if my automations work tonight in the off peak window.

Thanks everyone for the suggestions.

[davidb187]

hmm.. tried the 0p for inport and export rates all times and 100% in backup mode and time based mode with no luck

I now can't make the powerwall charge either through the app - via time based control or self-powered and setting backup to 100%. will see if it just resets itself after a few hours.

[bonkersbrains]

Mine still works just fine. I am on version 3.25.5
To force charge I set the backup reserve to 100 in home assistant.
I do not have mine linked to my octopus tariff but I have entered the prices manually in the teska app.
I leave it on time based control with grid charging set to yes.
Changing the backup number is all that is needed to force the charge even if it is at a peak rate according to the tesla tariff setting.
I only actually force the charge of octupus is reporting cheap rate though (e.g. The car is being charged by octupus during the day).

Using a powerwall 2.
Same firmware as the previous person that posted.

[Gerynant24]

Tesla support have stated in v26.2.0.x that changes have been made apparently that prevent instant charging during peak rate in Timed mode, so watch for the update.
My problem is that since the update, if I try to use HA at all, the whole system stops working, including the app.
It all went wrong after the update.

[DiaryofaCatman]

I think for me - it might have been that I had recently used the function to link your energy supplier function in the Powerwall app.

This afternoon I removed that data by setting a custom rate plan with 0p for all times on both import and export.

I can now force a backup to 100% and it starts a Grid Charge, so I will check to see if my automations work tonight in the off peak window.

Thanks everyone for the suggestions.

Well another night another failed overnight charge.
The charging works in the daytime - with the same commands to set the backup to 100% and enable grid charge.
The powerwall was set to 0p and 0p for import and export at all hours
But when the same commands were automated at 02:30 GMT - the parameters change but the Powerwall does not charge.

For my experiment tonight I've manually put in the my rates in again to see what happens

[axelthefatcat]

OK - So I have the issue where the Powerwall is not charging to 100% as it is only charging at 3.5kw. Everything else is working, all of my automations etc. for charging the Powerwall up. I have spoken to my installer today who has said that Tesla are trying to stop Powerwalls being constantly charged up to 100% so that they can extend the life of the batteries (I see this as dodging a warrenty claim personally). My installer has had many customer complain about this and with an email to Tesla support they can remove this block. My installer are going to email Tesla on my behalf to sort this for me.

[skipishere]

My powerwall finally got the new firmware version 26.2.0.87adb89e and is now doing the same behaviour as others have described. This seems like a mega Tesla screw up as now my powerwall basically does whatever the hell it likes (which at the moment is not using my power when I'm on Self Powered mode and taking from the grid even with a back up level at 20% and the battery is at 80%).

I recommend anyone else having problems report this to Tesla as it's most certainly not 'saving me money' and I should be able to change settings in the Tesla app and expect them to happen mostly straight away (or at least tell me why it won't apply)

[axelthefatcat]

Yes - Agreed - They should have added a button in the App to enable or Disable this "Battery Saving" feature