[ENH]: Charges and Fees correct

[drbacke]

Link to discussion and related issues

Fees are percentual, at the moment there is only one fix charge added, which is not correct. We should implement the single parts of fees ...

Proposed implementation

Strompreis (german)
+ Spotpreis / Börsenstrompreis
+ 19% MWSt
+ Netzentgelt + Messstellenbetrieb (lokal unterschiedlich) Durchschnitt ~ 11.53Cent
+ Konzessionsabgane (lokal unterschiedlich) ~ 1.8Cent
+ Stromsteuer 2,05 Cent / kWh
+ Offshore, EnWg usw.: 0,66 + 0,64 + 0,28 

[RenatusRo]

watching this from the sidelines:
even this is still too simplistic.
in other markets some of the fees depend on the day of the week or the hours of the day or even the season of the year.
[having seen all this stuff recently added to evcc, which now allows configuring a custom formula and more for tariffs
https://docs.evcc.io/docs/devices/tariffs
]

[sandboxcode]

Keep the following in mind - and it will be probably tedious to complete all data:

• time variable grid fees (german specific -> §14a EnWG) which are specific vor EVERY SINGLE distribution system operator (DSO)
• As these cost parts will greatly enable cost saving from Q2 or Q3 2025 we have to consider them
• Integration maybe via static or cost profile flag in config

As I am not fluent with the current config setup I am not able to suggest the best way of implementation. Still I wanted to mention it right here.

@RenatusRo This it also not yet implemented within the EVCC repo. Great tip to keep an eye on their codebase.
@drbacke I am open to help with all the regulatoric aspects and details as I deal with them on a near daily basis.

[drbacke]

Yes i know about §14a Module 3. But this should BE only an Array for Netzentgelte
It would be nice to have a API to get this Data automatically. But i could not find one.
And of course any Help is welcome😊

[sandboxcode]

@drbacke I will talk to some people that spezialized in exactly that market domain (those API providers earn a lot of money, because they operate the databases that EnWG "konforme" private customer electricity bills can be generated).
Based on that I want to gather the information to come up with an idea to gather the most pricing details as possible respecting pareto principle. 😄

@Lasall Should we have an exchange on that? Maybe we should start a free API service for that data haha?

[drbacke]

Before that we should Change simply the fix Fees with the single parts. As described in the issues @sandboxcode Plesse make a new issue for §14a