Fronius: Entities disappeared after HA Core 2026.1 Update | Home Assistant | Page 1

feral ferry Jan 24, 2026, 10:00 AM

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Hi,
I am using 2 Symo Gen 24 Inverters in my Setup, and am using the official Fronius integration for Home Assistant. This worked well until I updated HA Core to 2026.1, at which point some entities of one of the Inverters disappeared from Home Assistant. Inverter 1 has 2 strings, inverter 2 has 1 string. For inverter 2, the "Energy" and "Power" entities have disappeared, see screenshots. The missing entities' values are included in the diagnostics, though (also attached).
Reloading the integration and restarting the HA Host have not solved the issue, I have not yet tried to delete and re-add the affected inverter (I don't want to lose the history)
How can I fix this?

📎 fronius_1.json 📎 fronius_2.json

unborn token Jan 25, 2026, 11:38 AM

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Hi! The Fronius API responses sometimes don't include values that are 0. The HA integration only adds entities when their value is included in the API response. So you may need to just wait until there's some sun shining on the PV panels.

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Other than that, there have not been any changes to Fronius integration for a long time, so I don't think it could be related to the update of HA.

feral ferry Jan 25, 2026, 2:38 PM

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Hi! The issue first appeared about 2 weeks ago, no changes since 🙁

unborn token Jan 25, 2026, 2:40 PM

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What exactly are you missing? "Total energy" seems to be there. "AC Power" too.

feral ferry Jan 25, 2026, 3:09 PM

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"energy" and "power" of the individual strings

unborn token Jan 25, 2026, 4:28 PM

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You said one has only one string. The other picture shows 2 strings.

feral ferry Jan 25, 2026, 4:32 PM

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correct. the one with just one string still showed string power and energy up until the update.

unborn token Jan 25, 2026, 4:53 PM

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Hm... maybe a Fronius firmware update changed something.

feral ferry Jan 25, 2026, 4:58 PM

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both inverters are running version 'ROW 1.38.7-1', which was released September 24, 2025

unborn token Jan 25, 2026, 5:31 PM

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I don't know... isn't string power the same as total when there's only one string?

unborn token Jan 26, 2026, 2:15 PM

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feral ferry correct. the one with just one string still showed string power and energy up un...

So, I had a look: Inverters show DC current and DC Voltage for up to 4 strings. For power and energy there was always only 1 common entity. Did you use a template or something to calculate those?

feral ferry Jan 27, 2026, 6:33 PM

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ooooh you are right! I calculated power and energy from DC current and voltage! 🤦‍♂️

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now to find out why this specific template stopped working...

feral ferry Jan 27, 2026, 6:51 PM

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it seems the entity IDs of the inverter changed

unborn token Jan 27, 2026, 7:11 PM

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Awkward... did you at any point remove the config entry and re-add it?

feral ferry Jan 27, 2026, 7:46 PM

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hm. that may have been on me. I regerenated entity IDs, but only a few days after the issue first appeared. going through the logs rn...

feral ferry Feb 1, 2026, 12:26 PM

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I restored an older backup of my HA VM and I may have found the issue. The affected inverter was replaces at one point by a higher power one (3 kWp is just not enough for a 4.5kWp string 😄 ). I have created the template for power and the integral sensor for energy before the swap, but they were still "attached" (for lack of a better word) to the old inverter. altough the old was disabled, these still provided values I was using, because I updated the templates at some point

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old inverter at the bottom

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with the 2026.1 these sensors seem to have been disabled as well, causing my issue.

tawdry flint Mar 19, 2026, 4:30 PM

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@feral ferry I'm considering to get a Fronius PV system. Would you be OK with me sending you a DM? I'm interested in your general experience - it's not relevant to this thread

#Fronius: Entities disappeared after HA Core 2026.1 Update