Calculating grid only charged energy costs

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1

I’m searching for the right way to calculate the grid only charged energy of my electric car to get electricity costs for a charging session.
I’m using go-eCharger wallbox, Shelly 3EM for grid meter and EVCC to control charging process correctly.
So, I can identify when grid power or solar power from my Huawei Sun2000 is used for charging.
How is it possible to save the grid only charged energy time deltas in a variable or somehow to have a live energy/cost sensor? I’m searching for the right approach…
I could use values from InfluxDB also.

2

Use a utility meter with two tariffs. One for solar, one for grid. Use an automation to switch the tariffs whenever the charging source changes.

3

Thanks for your quick response. Didnt think about that and sounds good. I will give it a try.

4

Okay. Im already using utility meters for monthly charged energy and costs, but how to get values for one charging session. Cycle have to be something like “session” or “custom” with a start and end time.

5

Do they have tariffs to differentiate the source of charge though?

6

Got it. Thanks! :smiley:

7

Implemented four tariffs with the four EVCC “charging modes”:

  • off
  • now
  • minpv
  • pv

“off” seems not to be a valid tariff for utility meter:

Error executing script. Unexpected error for call_service at pos 1: Option off not valid for goecharger_energy_yearly

Guess I have to implement a template to change “off” to “offmode”.

8

Put it in Quotes:

  tariffs:
    - 'off'
    - now
    - minpv
    - pv

off and on are booleans unless you quote them.