Error: could not convert string to float: 'unknown'

[OneTwo3D]

Hi,
predbat is showing the status:
Error: Exception raised could not convert string to float: 'unknown', and the log is showing:
29617 | 2025-08-18 20:05:20.949615: Error: could not convert string to float: 'unknown'
29616 | 2025-08-18 20:05:20.949513: Info: record_status Error: Exception raised could not convert string to float: 'unknown'
29614 | ValueError: could not conve rt string to float: 'unknown'
29595 | 2025-08-18 20:05:20.932991: Error: Traceback (most recent call last):
29594 | 2025-08-18 20:05:20.930563: Error: Exception raised could not convert string to float: 'unknown'

Additionally on the apex charts page I'm getting the error entity not available: predbat.savings_total_predbat and entity not available: predbat_savings_total_pvbat

Predbat itself seems now to generate very weird charge/discharge plans, so something is wrong. But the log entries don't really help where the issue could be.

I was working fine for the last year, so not really sure what may have caused it.

[OneTwo3D]

Here a few more details from the log file:
2025-08-18 20:15:11.059384: Inverter 0 Disabled charge window while waiting for schedule (now 08-18 20:15:00 target set_window_minutes 30 charge start time 08-20 02:30:00)
2025-08-18 20:15:11.059480: Adjust idle time, charge 00:00:00-00:00:00 discharge 00:00:00-00:00:00
2025-08-18 20:15:11.059621: Adjust demand (idle) time computed is 19:55:00-23:59:00
2025-08-18 20:15:11.059710: Adjust idle time, charge 00:00:00-00:00:00 discharge 00:00:00-00:00:00
2025-08-18 20:15:11.059794: Adjust demand (idle) time computed is 19:55:00-23:59:00
2025-08-18 20:15:11.059844: Inverter 0 write_and_poll_value: No write needed for charge_start_time: 00:00:00 == 00:00:00 fuzzy 0
2025-08-18 20:15:11.059877: Inverter 0 write_and_poll_value: No write needed for charge_start_hour: 0 == 0.0 fuzzy 0
2025-08-18 20:15:11.059900: Inverter 0 write_and_poll_value: No write needed for charge_start_minute: 0 == 0.0 fuzzy 0
2025-08-18 20:15:11.059918: Inverter 0 write_and_poll_value: No write needed for charge_end_time: 00:00:00 == 00:00:00 fuzzy 0
2025-08-18 20:15:11.059941: Inverter 0 write_and_poll_value: No write needed for charge_end_hour: 0 == 0.0 fuzzy 0
2025-08-18 20:15:11.059962: Inverter 0 write_and_poll_value: No write needed for charge_end_minute: 0 == 0.0 fuzzy 0
2025-08-18 20:15:15.117314: Successfully pressed button button.solis_update_charge_discharge_times on Inverter 0
2025-08-18 20:15:15.117383: Inverter 0 Updated start and end charge window to 00:00:00 - 00:00:00 (old 00:00:00 - 00:00:00)
2025-08-18 20:15:19.130995: Switch sensor.predbat_GS_0_scheduled_charge_enable is now on
2025-08-18 20:15:19.131081: Inverter 0 Wrote scheduled_charge_enable to True successfully and got on
2025-08-18 20:15:19.131195: Error: Exception raised could not convert string to float: 'unknown'
2025-08-18 20:15:19.133861: Error: Traceback (most recent call last):
File "/config/predbat.py", line 1522, in run_time_loop
self.update_pred(scheduled=True)
File "/config/predbat.py", line 699, in update_pred
status, status_extra = self.execute_plan()
^^^^^^^^^^^^^^^^^^^
File "/config/execute.py", line 253, in execute_plan
inverter.disable_charge_window()
File "/config/inverter.py", line 2033, in disable_charge_window
self.adjust_charge_window(self.base.midnight_utc, self.base.midnight_utc, self.base.minutes_now)
File "/config/inverter.py", line 2369, in adjust_charge_window
self.enable_charge_discharge_with_time_current("charge", True)
File "/config/inverter.py", line 2106, in enable_charge_discharge_with_time_current
self.set_current_from_power(direction, power)
File "/config/inverter.py", line 2126, in set_current_from_power
self.write_and_poll_value(f"timed_{direction}current", self.base.get_arg(f"timed{direction}_current", indirect=False, index=self.id), new_current, fuzzy=1)
File "/config/inverter.py", line 1483, in write_and_poll_value
matched = abs(float(current_state) - new_value) <= fuzzy
^^^^^^^^^^^^^^^^^^^^
ValueError: could not convert string to float: 'unknown'

2025-08-18 20:15:19.151893: Info: record_status Error: Exception raised could not convert string to float: 'unknown'
2025-08-18 20:15:19.151989: Error: could not convert string to float: 'unknown'

[springfall2008]

Fix on main to catch this crash but it without debug yaml and logfiles it's hard to comment on the wider issue

[OneTwo3D]

Thanks @springfall2008: Here the debug.yaml and log file
predbat (2).log
predbat_debug.yaml

[OneTwo3D]

The update to 8.24.3 seems to have fixed the issue for now (no more errors or warnings at the moment).

[OneTwo3D]

It seems the latest update of the Solax plugin is causing the issues with "non float" data. After I started receiving app.yaml config errors for certain Solis sensors in Predbat on top of the issues described above I downgraded the Solax plugin and all errors have disappeared since.