ha-energy

Create template sensors with device_class: energy, state_class: total_increasing, and unit_of_measurement: kWh. These attributes let Home Assistant generate statistics and list the sensors in the energy dashboard configuration.

Add a utility_meter entry in configuration.yaml with your energy sensor as the source, cycle set to monthly, and an offset aligned to your billing start day. The meter resets automatically at each cycle boundary.

Missing or incorrect state_class on sensors is the most common cause; cumulative meters need total_increasing. Also verify the sensors are included in the recorder configuration and wait several minutes after restart for statistics to generate.

Yes, use the Riemann sum integration with your power sensor as the source, unit_prefix: k, and unit_time: h. This integrates instantaneous power over time into an energy value suitable for the energy dashboard.

Self-consumption requires separate battery charge and discharge sensors, each with device_class: energy and state_class: total_increasing. Then assign both sensors in the battery section of the energy dashboard configuration.

Avoid it for general automations, device pairing, Lovelace dashboard UI design, or non-energy sensor configuration. It focuses specifically on energy sensors, utility meters, statistics, and energy dashboard troubleshooting.