Code: Select all
#Templates enable math operations against states/values to give us better data
template:
- sensor:
# calculate inverter efficiency % using the difference between power in and power out
- name: "inverter_efficiency"
unit_of_measurement: "%"
state: >
{% set power_out = states('sensor.inverter_power_out') | float(default=0) %}
{% set power_in = states('sensor.inverter_power_in') | float(default=0) %}
{% set efficiency = power_out / power_in * 100 if power_in > 0.0 else null %}
{% set efficiency = 100 if efficiency > 100 else efficiency %}
{{ efficiency | round(1) }}
# calculate cell imbalance as % using the difference between min and max cell voltage
- name: "battery_cell_imbalance"
unit_of_measurement: "%"
state: >
{% set cell_high = states('sensor.bms_cell_mv_high') | float(default=0) %}
{% set cell_low = states('sensor.bms_cell_mv_low') | float(default=0) %}
{% set imbalance = (cell_high-cell_low) / (cell_high + cell_low) * 200 if cell_low > 0.0 else 0.0 %}
{% set imbalance = 0.0 if cell_high < cell_low else imbalance %}
{{ imbalance | round(2) }}
# calculate the number of hours that the battery can power the current load for
- name: "battery_duration"
icon: "mdi:timer-play"
unit_of_measurement: "h"
state: >
{% set min_soc = 4 * 2.56 * 0.12 %}
{% set energy = states('sensor.bms_kwh_remaining') | float(default=0) %}
{% set power = states('sensor.load_power') | float(default=0) %}
{% set power = 0.1 if power < 0.1 else power %}
{% set hours = ((energy - min_soc) / power) | int %}
{% set hours = 24 if hours > 24 else hours %}
{% set hours = 0 if hours < 0 else hours %}
{{ hours }}
# calculate the amount of energy stored in the battery today
- name: "battery_backfill"
device_class: "energy"
unit_of_measurement: "kWh"
state: >
{{( states('sensor.pv_energy_daily')|float(default=0)
+ states('sensor.grid_daily')|float(default=0)
- states('sensor.load_daily')|float(default=0)
- states('sensor.feedin_daily')|float(default=0)
- states('sensor.losses_daily')|float(default=0)
) | round(3) }}
# calculate power flowing into inverter from solar, battery and grid
- name: "inverter_power_in"
device_class: "power"
unit_of_measurement: "kW"
state: >
{% set pv_power_in = states('sensor.pv_power_now') | float(default=0) %}
{% set rpower = states('sensor.RPower') | float(default=0) %}
{% set rpower_in = 0.0 if rpower > 0.0 else rpower * -1.0 %}
{% set bat_power = states('sensor.InvBatPower') | float(default=0) %}
{% set bat_power_in = 0.0 if bat_power < 0.0 else bat_power %}
{% set power_in = pv_power_in + rpower_in + bat_power_in %}
{{ power_in | round(3) }}
# calculate power flowing out of inverter
- name: "inverter_power_out"
device_class: "power"
unit_of_measurement: "kW"
state: >
{% set rpower = states('sensor.RPower') | float(default=0) %}
{% set rpower_out = 0 if rpower < 0.0 else rpower %}
{% set eps_power_out = states('sensor.EPS_RPower') | float(default=0) %}
{% set bat_power = states('sensor.InvBatPower') | float(default=0) %}
{% set bat_power_out = 0 if bat_power > 0.0 else bat_power * -1.0 %}
{% set power_out = rpower_out + eps_power_out + bat_power_out %}
{{ power_out | round(3) }}
# calculate grid balance - difference between grid power imported and exported
- name: "net_import_daily"
device_class: "power"
unit_of_measurement: "kWh"
state: >
{{( states('sensor.grid_daily') | float(default=0)
- states('sensor.feedin_daily') | float(default=0)
) | round(3) }}
# calculate grid dependency - difference between load power consumed and solar power generated
- name: "grid_dependency_daily"
device_class: "power"
unit_of_measurement: "kWh"
state: >
{{( states('sensor.load_daily') | float(default=0)
- states('sensor.pv_energy_daily') | float(default=0)
) | round(3) }}
# calculate sytem losses. Clip range between -1kw and +1kw to remove sampling errors and spikes
- name: "System Losses"
device_class: "power"
unit_of_measurement: "kW"
state: >
{% set power_in = states('sensor.inverter_power_in') | float(default=0) %}
{% set power_out = states('sensor.inverter_power_out') | float(default=0) %}
{% set losses = power_in - power_out %}
{% set losses = -1.0 if losses < -1.0 else losses %}
{% set losses = 1.0 if losses > 1.0 else losses %}
{{ losses | round(3) }}