I’ve recently become fascinated with optimizing my home’s energy consumption and exploring the capabilities of Home Assistant in managing energy data. My goal is to calculate my home’s self-sufficiency (autarchy) and self-consumption in real-time using the available sensors and data points.
Here’s what I’ve been working with:
- Solar Production: sensor.solar_producing_w
- Grid Absorption: sensor.metering_power_absorbed
- Grid Supply: sensor.solar_to_grid
- Battery Discharge: sensor.battery_power_discharge_total
- Battery Charge: sensor.battery_power_charge_total
The challenge lies in determining the correct formula to derive autarchy and self-consumption from these values. For instance, autarchy could be calculated as the ratio of solar energy used directly by the home to the total energy consumed. Similarly, self-consumption might involve the sum of solar energy used by the home and stored in the battery, divided by total solar production.
I’d love to hear from others who have tackled similar projects. What formulas or methods have you found effective? Have you integrated these metrics into your dashboards or automations? Any tips or resources would be greatly appreciated!
Let’s collaborate to make our energy systems smarter and more efficient! 