I would like to share my approach to the question "How many electric charging stations are there in Germany"?

1. demand per day / 2. met demand per charging station per day / 3. percentage lost to domestic charging.

1.1. #Electric cars+hybrid cars / 1.2. after how many days a car has to refuel on average

1.1. #electric cars = #number of cars x %electric/hybrid cars = population / number of people per household x %electric/hybrid cars 80 mio / 2 x 2% (based on the observation that on average there is 1 car per household and in a large car park near me every 50th car is approx. an electric car) = 800,000

1.2. after how many days a car has to refuel on average: average driving distance of an e-car / average consumption per day = 350km / 50km = refuel every 7 days

1 = 800,000 / 8 => 115,000 electric cars refuel per day

2. covered demand per charging station per day = 1 charge takes approx. 6h, then approx. 2 charges can be completed per day, as hardly anyone takes their car away for charging between 23.00 - 08.00, therefore on average 2 cars can be served per day

3. 50% of the charging takes place at home: Observation through charging behaviour of our e-car

=> 115,000 / 2 x 0.5 = approx. 28,500 charging stations

I look forward to feedback!