I have a Navian NPE-240 hot water heater, with a cumulative gas use sensor measured in m:
sensor.ch1_unit1_cumulative_gas_use:
state_class: total_increasing
unit_of_measurement: m³
device_class: gas
friendly_name: CH1_UNIT1 Cumulative Gas Use
However it won't let me add it as a device to the Energy Dashboard (does not appear in list). I tried creating a template sensor using kcal (m³ * 8837), but it also won't let me add it to dashboard. According to https://www.home-assistant.io/docs/energy/faq/#troubleshooting-missing-entities, the sensor should meat all the criteria for being able to add it. What am I doing wrong here?
The funny thing is it will let me add it as as Gas Source, but not a Device.