Calculate/Display cost savings from self consumed solar energy

Feature Requests
1

Would it be possible to add the calculated cost savings from the self consumed solar energy in the energy view like you display cost from sold energy?

2

Would love to see this implemented! They have the data so I don’t see why it shouldn’t be possible!

3

Same here, having the savings calculated is really something I miss.

4

This is how I’m calculating this here, which variable buy/ sell pricing.

1 Like
5

Would also like to have this feature.

3 Likes
6

I would also like to have this feature.

I mean ok, every year you can compute it yourself to estimate when ROI will be reached.
But why not just add it to the energy dashboard…

There is a duplicate feature request from January 2022:

7

How have you written the sensors for things like:
“Solar to grid”,“Solar to battery”,“grid to battery” etc?

It seems like this data ought to be readily available out of the energy data in HA but i can’t find reference to them.

8

I calculate the actual power flow for each component using these templates:

Then use powercalc to calculate the energy flow for each component. (or you could use rheinman integration)

Which visualises very nicely on the energy dashboard:

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and the Sankey card:

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9

@markpurcell

As I understand correctly, I need to have the Tesla Powerwall integration to create the base sensors like:

# grid sensor must be negative when importing and positive when exporting
    - name: APF Grid Entity
      device_class: power
      state_class: measurement
      unit_of_measurement: W
      state: "{{ (0 - states('sensor.powerwall_site_now')|float(0)*1000)|int(0) }}"

# sensor must always be 0 or positive (i think they always are)
    - name: APF House Entity
      device_class: power
      state_class: measurement
      unit_of_measurement: W
      state: "{{ (states('sensor.powerwall_load_now')|float(0)*1000)|int(0) }}"

# sensor must always be 0 or positive (i think they always are)
    - name: APF Generation Entity
      device_class: power
      state_class: measurement
      unit_of_measurement: W
      state: "{{ (states('sensor.powerwall_solar_now')|float(0)*1000)|int(0) }}"

# battery sensor must be positive when charging and negative when discharging
    - name: APF Battery Entity
      device_class: power
      state_class: measurement
      unit_of_measurement: W
      state: "{{ (0 - states('sensor.powerwall_battery_now')|float(0)*1000)|int(0) }}"

But what to do if I dont have the Tesla Powerwall and want to create these 4 base entities,

10

You need to identify the equivalent for your household setup for the four key variables; solar, site, house and battery power flow.

11

I thought so, but how do I create a sensor for the house? How do I calculate this.
I have entities for grid import and export, battery charge and discharge and solar production.
The problem is how to calculate what the house is using, I can see this in the standard energy dashboard, but there is still no entity available for.

Thanks,
Rien

12

You can make a template sensors (apf house entity) to calculate your house consumption:

House Consumption = solar + gridImport - GridExport + BatteryDischarge - BatteryCharge

13

Thanks,

I think it’s working. Will let it run for a couple of days

1 Like