Homeassistant error: non-finite value: 'nan'

[kumy]

Hi @mathieucarbou

happy new year 🥳

I just discovered these home assistant error logs.
May you have a look please 🙏

Looks like [at least] the grid_frequency metric is reporting nan which is a non numeric value.

Logger: homeassistant.components.mqtt.models
Source: components/mqtt/models.py:368
integration: MQTT ([documentation](https://www.home-assistant.io/integrations/mqtt), [issues](https://github.com/home-assistant/core/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+mqtt%22))
First occurred: January 7, 2026 at 9:03:35 PM (8 occurrences)
Last logged: 2:03:59 AM

Value error while updating state of sensor.yasolr_pro_d3e458_grid_frequency, topic: 'yasolr_d3e458/grid/frequency' with payload: b'nan': Sensor sensor.yasolr_pro_d3e458_grid_frequency has device class 'frequency', state class 'measurement' unit 'Hz' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-finite value: 'nan'
Value error while updating state of sensor.yasolr_pro_d3e458_grid_power, topic: 'yasolr_d3e458/grid/power' with payload: b'nan': Sensor sensor.yasolr_pro_d3e458_grid_power has device class 'power', state class 'measurement' unit 'W' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-finite value: 'nan'
Value error while updating state of sensor.yasolr_pro_d3e458_grid_power_factor, topic: 'yasolr_d3e458/grid/power_factor' with payload: b'nan': Sensor sensor.yasolr_pro_d3e458_grid_power_factor has device class 'power_factor', state class 'measurement' unit 'None' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-finite value: 'nan'
Value error while updating state of sensor.yasolr_pro_d3e458_grid_voltage, topic: 'yasolr_d3e458/grid/voltage' with payload: b'nan': Sensor sensor.yasolr_pro_d3e458_grid_voltage has device class 'voltage', state class 'measurement' unit 'V' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-finite value: 'nan'

Thanks

[mathieucarbou]

Hi,
Yes I am not filtering when they become unknown. Sad that HA does not treat nan as unavailable. I will update the code and issue a fix.

[mathieucarbou]

@kumy : I've just launched a rc71 (https://github.com/mathieucarbou/YaSolR/releases/tag/v1.0.0-rc71). Should be good now.

[kumy]

Installed, thanks!

[kumy]

not seen in the logs since rc71 was installed, thanks