Hello. I'm new here. I've been using HA for a couple of months and have learnt lots. I'm trying to track the money I am saving from using solar energy, rather than purchasing from the grid. Everything is working pretty well, but I'm having a problem with the way my daily values are summing using utility meters. I have various template sensors, including one called Daily Solar Savings defined in template.yaml, which calculates the baseline cost of the energy generated and not exported:
- sensor:
- name: "Daily Solar Savings"
unique_id: daily_solar_savings
unit_of_measurement: "£"
state_class: total
device_class: monetary
state: >
{% set std = state_attr('sensor.flux_import_rates', 'standard') | float(0) %}
{% set solar = states('sensor.daily_solar_kwh') | float(0) %}
{% set export = (
states('sensor.daily_export_off_peak_kwh') | float(0) +
states('sensor.daily_export_standard_kwh') | float(0) +
states('sensor.daily_export_peak_kwh') | float(0)
) %}
{% set self = [solar - export, 0] | max %}
{{ (self * std) | round(2) }}
I then have 2 Utility Meters in configuration.yaml, created from the template sensor, to track daily and all-time accumulated savings:
utility_meter:
daily_solar_savings:
source: sensor.daily_solar_savings
cycle: daily
all_time_solar_savings:
source: sensor.daily_solar_savings
The problem is that I am getting small glitches and down-ward movements in my daily savings template (some unexplained, some when I restart HA). These make minimal impact to my daily readings, but they causing significant jumps in my accumulative utilty meter readings.
I can't work out how to fix this. I've tried setting state_class to measurement, rather than total, but that didn't help. Any pointers would be really appreciated.