Document the Fronius Modbus setpoint fallback - #47915
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🟡 Changes recommended
The new text needs small but important wording and UI-instruction edits for clarity and to match Home Assistant documentation style/tone.
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Pull request overview
This PR updates the Fronius integration documentation to explain the new option Revert the AC power limit if Home Assistant stops, including how the inverter behaves when Home Assistant is unavailable.
Changes:
- Added a new subsection describing how Modbus
AC power limitsetpoints persist and how the new revert option provides a timeout-based fallback. - Documented that the revert behavior applies only to
AC power limit, and that Fronius does not document a timeout for battery setpoints.
File summaries
| File | Description |
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| source/_integrations/fronius.markdown | Adds documentation for the Modbus setpoint fallback option and clarifies scope/limitations. |
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- Comments generated: 2
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| #### Falling back to the inverter's own settings | ||
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| A setpoint stays on the inverter until it is changed, including while Home Assistant is shut down or unreachable. To have the inverter recover on its own instead, turn on **Revert the AC power limit if Home Assistant stops**: go to **Settings** > **Devices & services**, select the Fronius integration, and choose **Configure**. |
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| A setpoint stays on the inverter until it is changed, including while Home Assistant is shut down or unreachable. To have the inverter recover on its own instead, turn on **Revert the AC power limit if Home Assistant stops**: go to **Settings** > **Devices & services**, select the Fronius integration, and choose **Configure**. | ||
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| The inverter then drops the `AC power limit` an hour after it last received it, and hands control back to its own priority list. Home Assistant sends the limit again every 15 minutes, so the hour only ever runs out once Home Assistant has really stopped - a restart or a short outage has plenty of room. An inverter held at `30 %` runs unrestricted an hour after the Home Assistant host dies. |
Proposed change
Documents the new Fronius option Revert the AC power limit if Home Assistant stops.
Setpoints written over Modbus stay on the inverter until they are changed - including while Home Assistant is shut down or unreachable. The option lets the inverter recover on its own: it drops the
AC power limitan hour after it last received it, while Home Assistant sends the limit again every 15 minutes so the hour only runs out once Home Assistant has really stopped.It also covers the case the option matters most for: removing the integration leaves the last limit in force with nothing left to take it back.
The new subsection also says what the option does not cover: Fronius documents no timeout for the battery setpoints, so those keep their value whatever happens to Home Assistant.
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