There are 50K public chargers in Denmark. 7K of which are fast chargers. There's no shortage of public chargers and more are deployed as demand is increasing. Also, Denmark is a small country. Most return trips inside the country would be doable on a single charge if you have one of the newer longer range vehicles. Copenhagen to Aarhus is only 300km or so. You could do that without charging in a new BMW. Mostly people charge at home or at one of those tens of thousands of roadside chargers in their neighborhood.

And of course Denmark pioneered a lot of wind technology. The country is running on cheap wind power at this point and you can get really favorable rates off peak hours.