I recently set up a sensor to calculate my electricity costs based on a fixed rate, but now that the rate is changing, I need a more flexible solution. Here’s how I approached it:
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Understanding the Problem: My current setup uses a fixed rate (
0.3404 £/kWh) to calculate the yearly cost. However, with variable rates, this approach isn’t accurate anymore. -
Researching Solutions: I explored different methods to dynamically adjust the rate. One approach was to use a sensor that updates with the current rate. I considered integrating with an API that provides real-time electricity prices, but that seemed complex.
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Simplifying the Solution: Instead of real-time updates, I decided to manually update the rate when it changes. I created a new sensor for the current rate and linked it to my existing cost calculation.
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Implementation: I modified my calculation to use the dynamic rate sensor. Here’s the updated configuration:
yaml
sensor:
- platform: template
sensors:
yearly_electricity_cost:
value_template: “{{ (states(‘sensor.current_electricity_rate’)|float * states(‘sensor.yearly_inverter_energy’)|float)|round(2) }}”
unit_of_measurement: ‘£’
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Testing: I tested the setup by changing the rate in the
current_electricity_ratesensor. The cost sensor updated correctly, reflecting the new rate. -
Future Improvements: While this solution works for manual updates, I plan to explore automated rate updates using an API in the future.
This approach ensures my electricity cost calculations remain accurate even with changing rates. If anyone has suggestions for automating the rate updates, I’d love to hear them!