Calculate feedin tariff

[wardwygaerts]

I have a dynamic tariff. These prices are available via the entso-e integration. The feedin is based on these prices, so I would like to calculate them to show them in the webinterface. Can this be done directly in evcc?

[VolkerK62]

you can use the flexible tariff also in the feedin section

[wardwygaerts]

you can use the flexible tariff also in the feedin section

Correct, but my energy supplier calculates the feedin prices, based on the day ahead prices. And they don't publish them somewhere

The calculation: 0,08 X BELPEX - 2,167

[VolkerK62]

So you get the day-ahead-prices from entso-e?
Idea is, to use charges and tax for the calculation

To make clear the calculation
let´s say, day-ahead-price = 20ct

you will get: 0,08 * 20ct - 2,167ct = -0,567ct
So you have to pay for feedin??

[wardwygaerts]

you will get: 0,08 * 20ct - 2,167ct = -0,567ct
So you have to pay for feedin??

The belpex price is in €/MWh, so when the index is 20ct/kWh = 200 €/MWh => 0,08 * 200 - 2,167 = 13,833ct/kWh.
But if the price lowers below 27 €/MWh, I will need to pay to feedin indeed.
The formula alsof changes almost every month...

[VolkerK62]

got it

  feedin:
    type: custom
    price:
      source: http
      uri: http://localhost:7070/api/state
      jq: (.result.tariffGrid / (1 + 0.2) - 0.1) * 10 * 0.08 - 0.02167

the actual grid price is recalculated to the price without tax and charges
(.result.tariffGrid / (1 + 0.2) - 0.1) (where 0.2 is tax and 0.1 is charges)

and then the feedin price is calculated

[wardwygaerts]

Thanks! That did the trick!

small related question: the index prices I get from Entso-E always have more decimals. eg, 116,50 €/MWh, but in EVCC this becomes 11,7ct and not 11,65ct. Just a small thing, but can this be configured?

[VolkerK62]

Just a small thing, but can this be configured?

It is hardcoded. So it must be done in the code.

[RenatusRo]

@wardwygaerts
how did you put the marge_procentueel in your grid tariff formula?

(current_price * marge_procentueel) + marge_per_kwh + bijz_accijns + energiebijdrage + kost_gsc + kost_wkk + afnametarief) * tax)

[wardwygaerts]

I didn't changed anything for my grid tariff. So I only check the price which I get from entso-e.
You don't have control of the extra taxes etc, so just looking at the price seems fine for me.