Public AC charging in Germany isn't great, but DC/Fast charging is quite good. I traverse the entire country with a Kia Nero EV, and that's not really a problem using either EnBW, Tesla or Ionity chargers. Besides these networks there are enough others with mostly nation-wide coverage (but not as cheap as these).

(EnBW and Ionity for 39ct/kwh, tesla for a bit more or less, depending on time and location)