Home Assistant energy tariff with monthly fee

Hello folks,

maybe someone can help me with the tariffs for the Energy Dashboard.

My electricity provider charges me a monthly fee of EUR 15 for the electricity connection. A further EUR 0.20 will then be charged for each kW/h consumed (no peak times rates or similar).

Although I can enter the 0.20 EUR per kW/h as a static price in the Energy Dashboard, the 15 EUR basic fee is then missing. So I would have to create a tariff in Home Assistant that matches my specifications.

Maybe someone has a solution?