Internal server error due to "time_zone_not_found" about teslamate HOT 10 CLOSED

Adding TM_TZ will not help here. There is no code inside TeslaMate that looks at TM_TZ. If you remove TZ and replace it with TM_TZ then you haven't actually set the timezone.

The key problem here is that PL is not a valid TZ identifier.

Look at https://en.wikipedia.org/wiki/List_of_tz_database_time_zones I think the correct value is "Poland".

iex(4)> Timex.Timezone.get("PL")
{:error, :time_zone_not_found}
iex(5)> Timex.Timezone.get("Poland")
#<TimezoneInfo(Poland - CET (+01:00:00))>

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Well, it turns out I was wrong. I actually have 2 cars connected to Teslamate and by checking Grafana I've just found out that the one that my father drives was being charged when I was getting this error.

Now that both cars are not being charged, the website loads fine, so it seems that this is indeed related to the estimated completion time feature.

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Try adding TM_TZ, the timezone and keep TZ in the file as well. Restart the container and see what happens when you start charging.

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The key problem here is that PL is not a valid TZ identifier.

Look at https://en.wikipedia.org/wiki/List_of_tz_database_time_zones I think the correct value is "Poland".

It seems like this is the solution, I'll test it soon. I think the most appropriate value would be "Europe/Warsaw" but both should work.

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I can confirm that the invalid identifier was the problem. I've changed it to Europe/Warsaw and everything works now :)

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Are you charging at the time of the internal server error?

Does your Docker file contain the TZ environment variable?
https://docs.teslamate.org/docs/configuration/environment_variables

Release 1.28.3 introduced estimated completion time for charging and we are seeing errors while charging.

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Are you charging at the time of the internal server error?

I checked both while charging and not, it didn't change anything.

Does your Docker file contain the TZ environment variable? https://docs.teslamate.org/docs/configuration/environment_variables

Yes, it does. TZ=PL

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Try adding TM_TZ, the timezone and restart the container. Reference #3678

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Great catch @brianmay, thank you.

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Please note that when setting your TZ env you can't have it in quotes.
eg. In a Docker compose
- TZ="Australia/Brisbane"
Fails, but
- TZ=Australia/Brisbane
Works.

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