core: Sensor is missing reactive energy

The problem

Sensor has device class of reactive_power but it lacks its counterpart that would be reactive_energy measured in VArh, kVArh, etc.

Energy meters usually measure it and in some cases reactive energy consumption is also billed. I think it should be part of Home Assistant and I believe it would be easy change to do.

It looks to me like an accidental, instead of intended omission, that’s why I am reporting it as bug, not as feature request.

What version of Home Assistant Core has the issue?

2023.1.2

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

sensor

Link to integration documentation on our website

https://www.home-assistant.io/integrations/sensor#device-class

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Log Details (WARNING)


Logger: homeassistant.components.sensor
Source: components/sensor/__init__.py:980 
Integration: Sensor (documentation, issues) 
First occurred: 10:03:12 (14 occurrences) 
Last logged: 10:03:36

Entity sensor.l3_pobrana_energia_bierna (<class 'homeassistant.components.modbus.sensor.ModbusRegisterSensor'>) is using native unit of measurement 'kvarh' which is not a valid unit for the device class ('energy') it is using; Please update your configuration if your entity is manually configured, otherwise create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+modbus%22
Entity sensor.oddana_energia_bierna (<class 'homeassistant.components.modbus.sensor.ModbusRegisterSensor'>) is using native unit of measurement 'kvarh' which is not a valid unit for the device class ('energy') it is using; Please update your configuration if your entity is manually configured, otherwise create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+modbus%22
Entity sensor.l1_oddana_energia_bierna (<class 'homeassistant.components.modbus.sensor.ModbusRegisterSensor'>) is using native unit of measurement 'kvarh' which is not a valid unit for the device class ('energy') it is using; Please update your configuration if your entity is manually configured, otherwise create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+modbus%22
Entity sensor.l2_oddana_energia_bierna (<class 'homeassistant.components.modbus.sensor.ModbusRegisterSensor'>) is using native unit of measurement 'kvarh' which is not a valid unit for the device class ('energy') it is using; Please update your configuration if your entity is manually configured, otherwise create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+modbus%22
Entity sensor.l3_oddana_energia_bierna (<class 'homeassistant.components.modbus.sensor.ModbusRegisterSensor'>) is using native unit of measurement 'kvarh' which is not a valid unit for the device class ('energy') it is using; Please update your configuration if your entity is manually configured, otherwise create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+modbus%22

Additional information

No response